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Manufacture ware diamond tool, made of superhard materials

Manufacture ware diamond tool, made of superhard materials

An abrasive is a material, often a mineral , that is used to shape or finish a workpiece through rubbing [1] which leads to part of the workpiece being worn away by friction. While finishing a material often means polishing it to gain a smooth, reflective surface, the process can also involve roughening as in satin, matte or beaded finishes. In short, the ceramics which are used to cut, grind and polish other softer materials are known as abrasives. Abrasives are extremely commonplace and are used very extensively in a wide variety of industrial, domestic, and technological applications.

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Content:

Modification of Resin and its Application to Resin-Bonded Diamond Wire Saw Manufacture

VIDEO ON THE TOPIC: Diamond tool pcd pcbn tools manufacturer

This is a division of U. The present invention relates to an improvement of cutting tool such as end mill and reamer having a twisted edge in the blade part, and more particularly to a cutting tool comprising a sintered compact of high hardness and high wear resistance buried and affixed in the blade part along the twisted edge, the sintered compact, such as polycrystalline diamond sinter and cubic boron nitride sinter, being higher in hardness and wear-resistance than its base material, and the manufacturing method of the cutting tool.

Hitherto, in order to meet the demands for enhancing cutting efficiency and prolonging tool life, cutting tools such as end mill and reamer having a sintered compact of diamond or cubic boron nitride in the blade part, the sintered compact being very high in hardness and excellent in wear resistance, have been developed and employed.

The sintered compact of high hardness and high wear resistance used in such conventional cutting tools is in a chip form shaped by sintering fine powder of diamond or cubic boron nitride at high temperature and high pressure. Besides, to facilitate bonding to the base material of the blade part such as cemented carbide and steel, the material powder of diamond or cubic boron nitride is not sintered alone, but it is sintered and formed on a substrate made of cemented carbide or the like.

Thus formed sintered chip is about 0. A straight edge end mill 1 in FIG. In the blade 2, moreover, two sintered chips 5 of high hardness and high wear resistance in semicircular plate form are buried and affixed by soldering so as to form part of the edges 4a, 4b at positions where much load is applied while machining, in particular.

A straight edge end mill 1a shown in FIG. Thus, in all conventional cutting tools, a high hardness sintered chip such as diamond sinter and cubic boron nitride sinter is buried and affixed so as to form part of the straight edge, and the other part of this straight edge is made of its base material itself.

Besides, such cutting tools composed of the sintered chips of high hardness and high were resistance buried therein are almost limited to straight edge type, and can not have twisted edge such as end mill and reamer.

This is because such a sintered chip is formed by sintering material particles at high temperature and superhigh pressure, and as a matter of course thus formed sintered chip is limited in its shape and size, and can not be in a twisted shape or be buried to form part of the twisted edge.

Moreover, when burying and affixing the sintered chip of diamond or cubic boron nitride to the base material of the blade by soldering, the chip is heated to a considerably high temperature, and the adverse effect by the heat cannot be ignored. In particular, in the case of a diamond sintered chip, heating may cause to form a graphite layer on the sintered chip surface and to burn the chip, so a sufficient caution is needed during work.

Yet, whether in diamond or in cubic boron nitride, soldering of the sintered chip and the base material may be peeled off by the heat during the process of machining.

On the other hand, cutting tools having a twisted edge on the flank of the blade part, for example, spiral end mills, are known to be more excellent in the cutting performance and the dimensional precision after cutting than the straight edge end mills. It is hence a primary object of the invention to present a cutting tool and its manufacturing method characterized by a sintered compact of diamond, cubic boron nitride and the like buried and affixed along its twisted edge, the sintered compact being higher in hardness and wear resistance than the base material of the blade part, and also characterized by excellent cutting performance, cutting efficiency, dimentional precision after cutting and long life thereof.

It is other object of the invention to present a cutting tool and its manufacturing method wherein the sintered compact of high hardness and high wear resistance of diamond and the like may be easily and securely buried and affixed to the base material and free from risk of peeling of the sintered compact during machining. To achieve the above objects, the invention presents a cutting tool possessing a twisted edge in the blade part, wherein.

The sintered compact of high hardness and high wear resistance is preferably formed of polycrystalline diamond sinter or cubic boron nitride sinter, and the base material of the blade part is preferably made of cemented carbide. The manufacturing method of the cutting tool of the present invention having a twisted edge in the blade part comprises:. Before the fifth step it may be also possible to include a step of bonding a shank member to one end of the base sinter body to which the sintered compact of high hardness and high wear resistance has been affixed.

Meanwhile, the fifth step should preferably include a step of machining a twisted flute by grinding the outer circumference of the base sintered body, and a step of machining the twisted edge by discharge cutting or electrolytic polishing of the sintered compact of high hardness and high wear resistance.

As a result of constructing in this way, the base material of the blade part is formed of a sinter, and the material of high hardness and high wear resistance, being buried in the twisted groove formed on the outer circumference of the base material and being higher in hardness and wear resistance than the base material, or the base sinter body, is also formed of a sinter.

Besides, the base sintered body and the sintered compact of high hardness and high wear resistance are affixed to each other by sintering, so that both of them are bonded at very high strength. Therefore, risk of peeling of the sintered compact of high hardness and high wear resistance from the base sintered body during machining will be eliminated.

Moreover, since the twisted edge is formed on the sintered compact of high hardness and high wear resistance buried in the twisted groove of the base sintered body, the cutting performance, cutting efficiency and dimensional precision after cutting are superior to those of the cutting tool having a straight edge, and the tool life is very long at the same time.

Still more, since the sintered compact of high hardness and high wear resistance is buried in the twisted groove formed on the outer circumference of the base sintered body and is affixed with the base sintered body by sintering, the sintered compact of high hardness and high wear resistance may be buried and affixed in the base sintered body easily and securely. Referring now to the drawings, one of the embodiments of the invention is described in detail below.

The spiral end mill 10 comprises a cemented carbide blade part 11 possessing four spiral twisted edges 15 and four straight front edges 17, and a steel shank 12 bonded to the base part of the blade part On the flank of the blade part 11 are provided four spiral twisted flutes 13 and lands 14, and the four twisted edges 15 are formed on and along each cutting side edge of the lands The front edges 17 are formed at the front end of the blade part 11, and individually extend and connect to the twisted edges At the ends of the twisted edge 15 side of the land 14, individually, a spiral twisted groove 14a is formed along the twisted edge 15, and the twisted groove 14a is solidly filled with a sintered compact 16 of high hardness and high wear resistance, higher in hardness and wear resistance than the cemented carbide forming the base part of the blade part The twisted edge 15 is formed on the sintered compact 16 of high hardness and high wear resistance.

As clear from the drawings, the twisted groove 14a reaches up to a front end surface of the blade part 11, and part of the sintered compact 16 of high hardness and high wear resistance is exposed on the front end surface.

Accordingly, only the outer end portion of the front edge 17 is formed of the sintered compact 16 of high hardness and high wear resistance, and the other portion thereof is made of the cemented carbide of the base material.

As the sintered compact 16 of high hardness and high wear resistance, any known sinter may be used as far as it is higher in hardness and more excellent in ware resistance than the base sintered body, and in particular a sintered compact formed of powder of polycrystalline diamond or cubic boron nitride sintered at high temperature and superhigh temperature is preferable.

The sintered compact 16 of high hardness and high wear resistance is formed, in this embodiment, as a thin layer with a thickness length in the radial direction of about 0. Also the twisted groove 14a is formed almost in the overall length of the twisted edge 15, and therefore the sintered compact 16 of high hardness and high wear resistance is also buried almost in the overall length of the twisted edge Since the sintered compact 16 of high hardness and high wear resistance is very expensive, in order to reduce its consumption, it may be formed only in the part near the front end of the twisted edge 15 or it may be also preferable to be buried as a thin layer in the area close to the twisted edge 15 of the land Referring next to FIG.

Material powder of cemented carbide to become the base material of the blade part 11 is presintered to form a columnar base material 20 as shown in FIG. Four spiral twisted grooves 14a are formed on the outer surface of thus presintered base material As a result, the shape of the presintered base material 20 becomes as shown in FIG.

The twisted grooves 14a are set at the positions where the twisted edges 15 are formed, corresponding to the number and lead of the twisted edges 15, and usually the width and depth of the twisted grooves are preferably both about 1 mm. A proper sintering aid is mixed to material powder of polycrystalline diamond or cubic boron nitride to become the sintered compact 16 of high hardness and high wear resistance, and thus mixed powder is filled in the twisted grooves 14a of the presintered base material As a result, the entire form becomes nearly a perfect cylindrical form.

In secession, the presintered base material 20 having the twisted groove filled with the powder is put into a heating and pressurizing apparatus 21 shown in FIG. Consequently, the presintered base material 20 is completely sintered to become a base sintered body, and the mixed material powder of sinter of high hardness and high wear resistance filled in the twisted grooves 14a is sintered to become sinter compacts 16 in the twisted grooves 14a. At the same time, the sintered compacts 16 of high hardness and high wear resistance are firmly affixed to the base sintered body 20 to be united in one body.

Thus is manufactured, as shown in FIG. The columnar sintered body is used as the blade part 11 of the spiral end mill The heating and pressurizing apparatus 21 schematically shown in FIG. Therefore, different from the conventional apparatus capable of manufacturing only a flat sinter, a sinter of a solid shape as mentioned above may be also manufactured.

At one end of the base sintered body 20 of which twisted grooves 14a are filled solidly with the sintered compacts 16 of high hardness and high wear resistance, a shank member 23 is bonded by soldering, and then a semifinished product 24 of the spiral end mill 10 as shown in FIG.

In succession, twisted flutes 13 and twisted edge 15 are processed on the outer surface of the base sintered body 20 of the semifinished product 24 shown in FIG. First, the semifinished product 24 is set in a grinder or the like, and four twisted flutes 13 and lands 14 are machined by grinding on the outer surface of the base sintered body 20 of the semifinished products 24 by using diamond wheel, so that a finishing allowance may be left over on each sinter 16 of high hardness and high wear resistance.

Since the base sintered body 20 is made of cemented carbide, machining of the twisted flutes 13 and the lands 14 may be same as that of conventional cutting tools made of cemented carbide. After completion of machining of twisted flutes 13 and lands 14, the sintered compacts 16 of high hardness and high wear resistance are finished precisely and accurately by discharge cutting, electrolytic polishing or the like, and twisted edges 15 and front edges 17 are formed, thereby the spiral end mill 10 shown in FIG.

Using this spiral end mill 10, machining is preformed in the same manner as in the conventional spiral end mill, by means of the twisted edges 15 entirely formed of the sintered compacts 16 of high hardness and high wear resistance, and by means of the front edges 17 partially formed of the sintered compacts 16 of high hardness and high wear resistance.

In the foregoing embodiment, the material powder to become the base material is discribed as being presintered in the first step, however, it may be also completely sintered at this step. Also, in the foregoing embodiment, only the spiral end mill is described, but, needless to say, the invention may be similarly applied to other cutting tools than the end mill as far as one has a twisted edge.

As described herein, the cutting tool of the invention is manufactured by forming twisted grooves on the outer circumference of the presintered or the sintered base material of the blade part, burying material powder of sinter of high hardness and high wear resistance in the twisted grooves, affixing the material powder to the base material by sintering, the material powder becoming a sintered compact higher in hardness and wear resistance than the sintered base material, or the base sintered body, and disposing twisted edges on the sintered compact of high hardness and high wear resistance.

Therefore, as compared with the cutting tool having straight edges, the cutting tool of the present invention excels in the cutting performance, cutting efficiency and dimensional precision after cutting, and what is more, unlike the conventional cutting tool, there is no risk of peeling of the sinter compact due to heat during cutting operation, and a stable performance is exhibited for a long period, and the service life is very long.

Besides, in the manufacturing method of the cutting tool of the invention, after the twisted grooves formed on the outer circumference of the presintered base material being filled with material powder of sinter of high hardness and high wear resistance, the presintered base material is completed sintered to form a base sintered body, and at the same time the material powder fo sinter of high hardness and high wear resistance is sintered to form a sintered compact and affixed to the base sintered body, so that burying and affixing of the sintered compact of high hardness and high wear resistance to the base sintered body may be executed easily and securely.

Also, the same effect will be brought about when the material powder of sinter of high hardness and high wear resistance is filled in the twisted grooves of the sintered base material, or the base sintered body, and then sintered to be affixed to the base sintered body.

Year of fee payment : 4. Year of fee payment : 8. Year of fee payment : The invention relates to a cutting tool having twisted edge in a blade part, having a sintered compact with higher hardness and higher wear resistance than a base sintered body buried and affixed along the twisted edge, and its manufacturing method.

The blade part of the cutting tool comprises the base sintered body having a twisted groove in the position of forming the twisted edge on the outer circumference, and the sintered compact of high hardness and high wear resistance applied and buried in the twisted groove and affixed to the base sintered body by sintering, and the twisted edge is formed on the sintered compact of high hardness and high wear resistance.

Its manufacturing method comprises a step of forming a presintered or a sintered base material of the blade part with material powder, a step of forming a twisted groove on the outer circumferenced of the base material, a step of filling the twisted groove with material powder of sinter of high hardness and high wear resistance, a step of heating and pressurizing the base material with the material powder, and sintering and affixing the material powder to the base material, and a step of machining thus sintered and united base material to form a twisted edge on the sintered compact of high hardness and high wear resistance.

Field of the Invention The present invention relates to an improvement of cutting tool such as end mill and reamer having a twisted edge in the blade part, and more particularly to a cutting tool comprising a sintered compact of high hardness and high wear resistance buried and affixed in the blade part along the twisted edge, the sintered compact, such as polycrystalline diamond sinter and cubic boron nitride sinter, being higher in hardness and wear-resistance than its base material, and the manufacturing method of the cutting tool.

Description of the Prior Art Hitherto, in order to meet the demands for enhancing cutting efficiency and prolonging tool life, cutting tools such as end mill and reamer having a sintered compact of diamond or cubic boron nitride in the blade part, the sintered compact being very high in hardness and excellent in wear resistance, have been developed and employed.

Examples of such conventional cutting tools are shown in FIG. Such structure is quite the same in other cutting tools. SUMMARY OF THE INVENTION It is hence a primary object of the invention to present a cutting tool and its manufacturing method characterized by a sintered compact of diamond, cubic boron nitride and the like buried and affixed along its twisted edge, the sintered compact being higher in hardness and wear resistance than the base material of the blade part, and also characterized by excellent cutting performance, cutting efficiency, dimentional precision after cutting and long life thereof.

To achieve the above objects, the invention presents a cutting tool possessing a twisted edge in the blade part, wherein the blade part comprises a base sintered body having a twisted groove in the position of forming the twisted edge on the outer circumference, and a sintered compact of high hardness and high wear resistance, higher in hardness and wear resistance than the base sintered body, being applied and buried in the twisted groove and affixed to the base sintered body by sintering, and the twisted edge is formed on the sintered compact of high hardness and high wear resistance.

Numeral 18 is a junction of the blade part 11 and a shank First step Material powder of cemented carbide to become the base material of the blade part 11 is presintered to form a columnar base material 20 as shown in FIG. Second step Four spiral twisted grooves 14a are formed on the outer surface of thus presintered base material Third step A proper sintering aid is mixed to material powder of polycrystalline diamond or cubic boron nitride to become the sintered compact 16 of high hardness and high wear resistance, and thus mixed powder is filled in the twisted grooves 14a of the presintered base material Fourth step In secession, the presintered base material 20 having the twisted groove filled with the powder is put into a heating and pressurizing apparatus 21 shown in FIG.

Fifth step At one end of the base sintered body 20 of which twisted grooves 14a are filled solidly with the sintered compacts 16 of high hardness and high wear resistance, a shank member 23 is bonded by soldering, and then a semifinished product 24 of the spiral end mill 10 as shown in FIG.

Sixth step In succession, twisted flutes 13 and twisted edge 15 are processed on the outer surface of the base sintered body 20 of the semifinished product 24 shown in FIG. What is claimed is: 1. A manufacturing method of a cutting tool having twisted edge in its blade part, comprising: a first step of forming a presintered base material of the blade part by presintering material powder,. A manufacturing method of a cutting tool having twisted edge in its blade part, comprising: a first step of forming a base sintered body of the blade part by sintering material powder,.

A manufacturing method according to claim 1, wherein a step of bonding a shank member to one end of the base sintered body affixed with the sintered compact of high hardness and high wear resistance is included before the fifth step.

A manufacturing method according to claim 2, wherein a step of bonding a shank member to one end of the base sintered body affixed with the sintered compact of high hardness and high wear resistance is included before the fifth step. A manufacturing method according to claim 1, wherein the fifth step comprises a step of machining twisted flute by griding on the outer circumference of the base sintered body, and a step of machining the twisted edge by discharge processing or electrolytic polishing of the sintered compact of high hardness and high wear resistance.

A manufacturing method according to claim 2, wherein the fifth step comprises a step of machining twisted flute by griding on the outer circumference of the base sintered body, and a step of machining the twisted edge by discharge processing or electrolytic polishing of the sintered compact of high hardness and high wear resistance.

A manufacturing method according to claim 3, wherein the fifth step comprises a step of machining twisted flute by griding on the outer circumference of the base sintered body, and a step of machining the twisted edge by discharge processing or electrolytic polishing of the sintered compact of high hardness and high wear resistance. A manufacturing method according to claim 4, wherein the fifth step comprises a step of machining twisted flute by griding on the outer circumference of the base sintered body, and a step of machining the twisted edge by discharge processing or electrolytic polishing of the sintered compact of high hardness and high wear resistance.

USA en. Cutter for shaping metal has tungsten carbide body with opposed polycrystalline cutting plates. USB2 en. Milling cutter with sintered carbide inserts - has end cutting inserts replaceable independently of side flute inserts. Truncated-cone roller with abrasive surface for smoothing tool with radial truncated-cone roller.

With strong tenacity and persistent determination, we endeavor to mark our prominence in supplying and exporting an impeccable range of PCD Cutting Tools Being one of the leading manufacturers and suppliers, we are providing a remarkable range of PCD Round Tool. These tools are used in automotive, electrical

Effective date : Year of fee payment : 4. Year of fee payment : 8. Year of fee payment : A method of making a cutting insert includes: i forming a blank having a substrate and superhard material, the substrate having more than 4 pockets, the superhard material disposed within the pockets; ii removing cutting tips from the blank by cutting the blank along cutting lines; iii providing a cutting insert body having a plurality of cavities for receiving a corresponding number of cutting tips; iv inserting a cutting tip into each of the plurality of cavities; and v brazing the cutting tips to the cutting insert body.

US20070051355A1 - Brazed diamond tools and methods for making the same - Google Patents

Patent No. SlO to S30 ; also suitable roughing operation without deformation maximum chip thickness greater than 0. A hard cutting tool member according to any preceding claim, the protective layer comprises a metal carbide, a metal from the group comprising Mo, W, Nb, Ta, V, T1, Cr, Zr, Hf and Si groups selected. The superhard cutting tool element according to claim 1, comprising a superhard structure substantially uniform layer thickness of the PCD material, the average thickness of at least 10 microns, at most micrometers. A method for processing segments or cutting a workpiece, the insert, the tool or the blade, said element comprising a superhard cutting tool according to any of the preceding claims. The segment according to claim 13, insert a blade or tool, or cutting a body containing composite flooring material.

diamond glass polishing tool

JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. At the core of your business are the tools and equipment that you could scarcely do without. These tools include diamond bridge saw blades , diamond angle grinder blades and diamond core drills. They are the essentials that keep your business running and a huge part of maintaining their effectiveness is keeping them in cut-ready condition! Before we talk too much about diamond sharpening blocks, let's start at the beginning. Right at the beginning.

In the world of technical ceramics, there are two materials which are only surpassed by diamond in terms of hardness — and both are used by Precision Ceramics as a base material for a wide range of technical components in an equally wide field of applications. Boron Carbide, for instance, is currently the hardest material produced in tonnage quantities and is the third hardest material known to man after diamond and cubic boron nitride.

A wide variety of diamond glass polishing tool options are available to you. You can also submit buying request for the abs sensor and specify your requirement on okchem. There are a lot off suppliers providing diamond glass polishing tool on okchem. Products through national and provincial quality inspection bodies of detection and identification, by the majority of praise and trust of customers home and abroad. Excellent product quality and stability, rare earth polishing superhard abrasive grinding and polishing the stone in the rapid and high gloss coating, its overall performance in the industry is leading. China Diamond Tool. If you are very urgent to get the price, please call us or tell us in your email so that we will regard your inquiry priority. Can you customize the products according to samples or drawing design9 -Yes.

Super Hard Ceramics – They don’t get much tougher

This application is a continuation-in-part of U. The present invention relates to tools having diamond particles chemically bonded to a matrix support material, and arranged in a predetermined pattern. More particularly, the diamond particles are chemically bonded to the matrix material by a braze compound that wets diamond.

This is a division of U. The present invention relates to an improvement of cutting tool such as end mill and reamer having a twisted edge in the blade part, and more particularly to a cutting tool comprising a sintered compact of high hardness and high wear resistance buried and affixed in the blade part along the twisted edge, the sintered compact, such as polycrystalline diamond sinter and cubic boron nitride sinter, being higher in hardness and wear-resistance than its base material, and the manufacturing method of the cutting tool. Hitherto, in order to meet the demands for enhancing cutting efficiency and prolonging tool life, cutting tools such as end mill and reamer having a sintered compact of diamond or cubic boron nitride in the blade part, the sintered compact being very high in hardness and excellent in wear resistance, have been developed and employed.

The purpose of this paper is to modify the resin binder for developing resin-bonded diamond wire saw. The optimization of components with different ratios in the resin binder was investigated using orthogonal design experiments. Besides, the resin-bonded diamond wire saw was developed using the piano wire the diameter is 0. Good surface quality and slicing performance were obtained when slicing silicon crystal using the resin-bonded diamond wire saw we made in the experiments. Request Permissions. Hardin, J. Qu, A. Shih: Mater. Processes Vol. Ge: Diam. Enomoto, Y.

diamond glass polishing tool, Wholesale Various High Quality diamond glass polishing tool Products from Global Sodium Glass raw materials Strontium Carbonate powder with CAS Made in China carbide polishing diamond glass tools Abrasive grinding wheel hard ware tools for polishing stone.

Poyang County Hongyu Diamond Tools Co., Ltd.

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US3594141A - Method for making a metal bonded diamond abrasive tool - Google Patents

Multi-layered superabrasive tools and methods for the making thereof are disclosed and described. In one aspect, superabrasive particles are chemically bonded to a matrix support material according to a predetermined pattern by a braze alloy. The brazing alloy may be provided as a powder, thin sheet, or sheet of amorphous alloy. A template having a plurality of apertures arranged in a predetermined pattern may be used to place the superabrasive particles on a given substrate or matrix support material. This application is also a continuation-in-part of U. The present invention relates generally to tools having diamond particles chemically bonded to a matrix support material, or a substrate, and arranged in a predetermined pattern. Accordingly, the present invention involves the fields of chemistry, metallurgy, and materials science. Abrasive tools have long been used in numerous applications, including cutting, drilling, sawing, grinding, lapping and polishing of materials. Because diamond is the hardest abrasive material currently known, it is widely used as a superabrasive on saws, drills, and other devices, which utilize the abrasive to cut, form, or polish other hard materials. Diamond tools are particularly indispensable for applications where other tools lack the hardness and durability to be commercially practical.

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Bevelling flat glass using synthetic diamond tools

Effective date : Polycrystalline diamond PCD carbide composites of this invention have a microstructure comprising a plurality of granules formed from PCD, polycrystalline cubic boron nitride, or mixture thereof, that are distributed within a substantially continuous second matrix region that substantially surrounds the granules and that is formed from a cermet material.

CN102427901B - Superhard cutter element - Google Patents

This is a continuation-in-part of U. For the machining of several non-ferrous alloys like brass and magnesium, diamond is the best tool material, whereas cubic boron nitride cBN is very well suited for machining hardened steel, chilled cast iron, and cast iron at elevated speeds. The cutting inserts used in such machining operations are either so-called PCD polycrystalline diamond compact or PcBN polycrystalline cubic boron nitride compact inserts, comprising a cemented carbide body with a diamond or cBN layer applied at such high temperature and pressure where the diamond or cBN is the stable phase or the inserts are provided with diamond or cBN bodies in at least one corner or along an edge generally fastened by brazing. The method of manufacturing such inserts has been described in, e.

Houston and Reginald C. Fisk, West Boylston, Mass.

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