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Publication numberUS2820281 A
Publication typeGrant
Publication date21 Jan 1958
Filing date30 Nov 1956
Priority date30 Nov 1956
Publication numberUS 2820281 A, US 2820281A, US-A-2820281, US2820281 A, US2820281A
InventorsAmsen Alfred W
Original AssigneeRed Devil Tools
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Abrasive article
US 2820281 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Jan. 21, 1958 A. w. AMSEN ABRASIVE ARTICLE Filed Nov. 50, 1956 j M/KWSQ BY 7* ATTORNEYS- United States Patentv O ABRASIVE ARTICLE Alfred W. Amsen, New Paltz, N. Y., assignmto Red Devil Tools, Union, N. J., a corporation Application November 30, 1956, Serial No. 625,383 1 Claim. (Cl. 29-78) This invention relates to improvements in abrasive devices.

The novel features of the invention are directed to the provision of a metallic, relatively thin, sheet-like, device having an abrasive face adapted to function in the manner of sandpaper and other similar materials having abrasive particles of various types secured to the face thereof.

The device of the invention, while being equal for all purposes and function to that of sandpaper and the like, not only has many advantages thereover but also is superior thereto in many important respects.

Sandpaper and similar materials soon become unserviceable through use. They tear and are easily ruptured, the abrasive particles thereof become loosened, and the abrasive surfaces thereof become worn and clogged. The result is that these prior art abrasive sheets have a relatively short life, and the paper or similar backing becomes limp from moisture so as to be unfit for use.

According to one novel feature hereof, the abrasive sheet is flexible so that it may conform to supporting blocks or to tools or devices with which sandpaper and the like is ordinarily used.

The abrasive device hereof may be readily cut or shaped by shears, as in the case of sandpaper and the like, and it is possible to provide a plurality of different grades or degrees of coarseness, as is the case with sandpaper and similar materials.

According to this invention, a thin sheet of flexible and bendable metal is provided on one side thereof with rows of relatively spaced groups of points or prejections which form the abrasive face. Such points or projections are formed by punching apertures or openings in the sheet, or by displacing the metal of the sheet at a multiplicity of places from one side or face thereof in such a manner that groups of upset portions or points are projected around the holes so as to form the abrasive surface.

According to a special feature of the invention, the groups of points are related in an important novel manner. They are spaced in rows which are non-straight. The rows extend transversely and longitudinally of the sheet so that the holes or groups of points of a row are not in alignment or in a straight row. In other words, a hole and its group of related points is offset to some extent relative to another hole adjacent thereto.

The novel arrangement of the points is such that, as the abrasive surface of the device is drawn across a piece of work, the work will not be objectionably scored or scratched as would be the case were the points in alignment or in a straight line.

To attain the desired relationship of the groups of points and thereby to avoid scoring and scratching, the rows of the groups of points are wavy. That is, successive groups of points of a row thereof wave back and forth along the length of the row, thereby to insure that adjacent groups of points are relatively offset or out of alignment as to each other.

The abrasive surface is superior to that of sandpaper in that it has a much longer useful life. Additionally, the device is not unfavorably affected by moisture.

The abrasive surface may be readily cleaned out when clogged as by brushing or by a liquid, and this is not possible with prior art abrasive sheets, such as sandpaper.

As an important feature of the invention, the metal from which the sheet is formed, while being relatively bendable and flexible so that it may be readily conformed to a support, such as a block or the like, is such that it will retain its shape. That is, edge portions of the sheet may be bent around or clenched over a flange, lip or edge of a holding tool whereby the sheet will maintain its form and grip. This is to be distinguished from the backing of sandpaper and similar materials where the backing entirely lacks shape-retaining characteristics.

The novel features of the invention will be described in connection with the preferred form thereof.

In the drawings:

Fig. 1 is a plan view of a portion of the non-abrasive face or side of an abrasive sheet or device embodying the novel features of the invention;

Fig. 2 is an enlarged partial plan view of the abrasive face of the sheet shown in Fig. 1;

Fig. 3 is a sectional view on the line 33 of Fig. 2;

Fig. 4 is an enlarged partial plan view of the abrasive face of the sheet to explain certain features of the invention;

Fig. 5 is a sectional view on the line 55 of Fig. 4;

Fig. 6 is a plan view of one form of a tool or holder with the abrasive device associated therewith; and

Fig. 7 is a sectional view on the line 7-7 of Fig. 6.

Referring now to the drawings more in detail, the novel features of the invention will be fully described.

The abrasive device of the invention consists of a sheet 2 of relatively thin bendable and flexible metal which is provided with rows of holes, such as 4.

The holes 4 may be formed by punching or piercing the sheet by such a tool or tools as will displace spaced portions of the sheet from the upper face thereof and form a plurality of groups of projections or points such as 6, to form an abrasive face. There will be a group of points related to each said hole.

In all cases, the upper or non-abrasive face of the sheet will preferably be relatively flat and smooth.

The metal from which the sheet is formed will be sufficiently bendable and flexible so that with the smooth side superposed on a support such as a block, the sheet may be conformed thereto. It is customary with sandpaper and similar abrasive materials to wrap a sheet or a portion thereof entirely or partly around a supporting block. The abrasive sheet of the invention may be similarly employed. Also, the sheet may be secured in or clamped by devices which are commonly used for holding sandpaper and the like.

While the metal from which the sheet is formed will have the desired flexibility and bendability for conforming to a support or holder, it will have shape-retaining characteristics, as distinguished from the backing of sandpaper and similar material. Where a portion of the sheet or an edge thereof is bent or folded over or around an edge, lip, flange or other part of a tool or holder so as to secure the sheet thereto, the bend or fold will be retained so as to hold the sheet against separation from the tool or holder. While the backing of sandpaper, and the like, may be bent or folded, the characteristics thereof are not such that the bend or fold is easily retained.

Sheets may be formed from metal of various thick- 'nesses and characteristics which will provide the desired flexibility of-sheet and stiffness of the projections or points.

It has been found, however, that sheet steel a few thousandths of an inch in thickness is particularly suitable for the practice of the invention.

The metal sheet will be displaced in such a manner as to provide the desired number of points in the groups thereof around the holes. The number of points, may be varied and it may be desirable to provide a greater or less number of points in groups around some of the holes than in the groups around other of the holes.

In all cases, the points will be short enough to with stand pressure and bending and they may have various degrees of sharpness. Such will depend on the charac teristics of the'tool or tools used in punching the holes or displacing portions of the sheet to form the points.

According to one important feature of the invention, the holes, and therefor the groups of points, are not in alignment so as to avoid scratching and scoring of the work as the abrasiveface is drawn thereacross. That is, a hole and its group of points is offset to some extent relative to an adjacent hole and its points.

This is accomplished, in one way, by arrangingthe holes in longitudinal and transverse rows which are nonstraight. Preferably said rows are Wavy, so that throughout their length the rows of holes wave back and forth and up and down, in a substantially definite pattern.

The coarseness ofthe abrasive face of the sheet may be varied by varying the number of points in a group and/or by providing points of different length and different degrees of sharpness.

The abrasive sheet may be readily and easily cut or shaped as may be desired and used on a block or secured or clamped in a holding device, as is the case with sandpaper and similar materials.

By arranging points in non-aligned relation, the likelihood of scratching or scoring work is obviated. The abrasive sheet'has a much longer life than that of sandpaper and similar materials, there being no backing likely to be unfavorably affected by moisture or to be otherwise ruptured and there being no abrasive particles which may be loosened from the backing. The abrasive face may be cleaned and restored to a useful condition merely by brushing or by application of a suitable liquid, all of which is not possible with sandpaper and like materials.

In Pigs. 2"and 3, the abrasive points 6 are shown'as being substantially straight. Such an arrangementwill be desirable for some purposes, and the extremities may have the desired degree of -sharpness. The points have relatively converging elongated'opposite side edges,as shown.

Gtherwise, as in Figs. 4* and'S, the points 6' around the holes 4 are non-straight and curving or curled foran abrasive function somewhat different than that of the abrasive faces of Figs. 2 and 3.

The curved or curled points 6 of a particular group are curved or curled away from each other as in Fig. 4.

in all cases, the points are such as to function similarly to the abrasive particles of sandpaper and the like. The points function with an abrasive action as distinguished from-a scarving'action as would be the case were there straight parallel cutting edges.

Various results may be obtained with metals of various thicknesses and characteristics, points of different lengths and stiffness, and with variousnumbers of' points in the groups thereof, all within the spirit and scope of the invention.

Excellent results have been obtained with cold-rolled, half-hard, low carbon steel about six-thousandths of an inch in thickness. The holes or perforations being formed with a piercing cit-punching tool or needle having five sides to provide a group of five points around the holes. lietal of other characteristics and having more or less points around the holes will come within the spirit and scopeof theimvention.

As has been pointed out, the abrasive device or sheet will be formed from metal which is flexible and bendable but which is adapted to retain bends or formations. In this way, the sheet may be applied to various tools or holding devices for use.

As an illustration, one form of holder or tool is represented by Tin Fig 6. Such a holder has lips or flanges 10 and a sheet of the abrasive material is cut to the size andshape for the holder. With the smooth side of the sheet on the tool, the marginal edge portions 12 thereof are bent or folded around and over the flange or lip. The retaining characteristics of the metal of the sheet are such that bent or folded. portions retain their shape and the abrasive sheet remains secure on the holder. Theedges or portions of the sheet may be bent or folded over onto, or around lips, beads, flanges of various tools or holders and other objects for securing the sheet thereto, to facilitate use thereof.

Various changes and modifications may be made in the form of abrasive device, without departing from the spirit and scope of the invention, and therefor it is desired to be limited, if at all, by the accompanying claim, rather than the foregoing disclosure.

What I desire to claim and secure by Letters Patent of the United States is as follows:

Anabrasive article having an abrasive surface on one face thereof comprising, a sheet of relatively thin and flexible'metal having relatively spaced groups of elongated point portions displaced upwardly relative to said one face providing holes within the points of the groups thereof, said point portions of the groups thereof curling upwardly and radially outwardly away from the sides of their respective holes in different directions and being disposed to lie over and spaced above and along portions of.saidone face around and outwardly of said holes, said point. portions being provided with opposite elongated'edges relatively converging outwardlyand away from the sides of their respective.holescooperating to form-said abrasive surface, said groups of point portions being arranged in non-straight horizontal and vertical rows whereby adjacent groups of points and their respective holes are misaligned horizontallyand vertically.

References Cited in the file of this patent UNITED STATES PATENTS 259,887 McCobb June 20, 1882 1,453,197 snyder. Apr. 24, 1923 2,103,499 Seifried-etal. Dec. 28, 1937 FOREIGN PATENTS 53,118 Switzerland Nov. 30, 1910

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US259887 *24 Apr 188220 Jun 1882 Heney mocobb
US1453197 *2 Sep 192124 Apr 1923Snyder Charles FFacing or cutting tool
US2103499 *11 Jul 193528 Dec 1937Ries FerdinandFile and rasp
CH53118A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3174363 *8 Nov 196123 Mar 1965Millers Falls CoMethod of forming cutting tools
US3375181 *21 Apr 196426 Mar 1968Gunther KoechMethod of forming an abrasive surface including grinding and chemically dressing
US3389447 *26 May 196725 Jun 1968Theobald ElwinOmnidirectional cutting tool
US3583107 *17 Jun 19698 Jun 1971Isak BenisFlexible sheet metal speed file
US4028781 *21 Jul 197614 Jun 1977Konrad Joseph DSurfacing tool
US4340162 *2 Sep 198020 Jul 1982The Nivison-Weiskopf Co.Roll dispenser carton
US4346829 *2 Sep 198031 Aug 1982The Nivison-Weiskopf Co.Roll dispenser carton
US4872452 *9 Jan 198910 Oct 1989Minnesota Mining And Manufacturing CompanyBone rasp
US5683292 *31 Jul 19964 Nov 1997Young; WayneAbrasive plate
US5772094 *24 Oct 199530 Jun 1998Allen-Reed Company, Inc.Cutting blade
US5947360 *9 Apr 19977 Sep 1999Metal Edge International, Inc.Cutting blade for cutting sheet materials
US5971840 *5 Mar 199726 Oct 1999Young; WayneAbrasive plate
US5984158 *9 Dec 199716 Nov 1999Metal Edge International, Inc.Cutting blade for cutting sheet materials
US755330715 Oct 200530 Jun 2009Baxano, Inc.Devices and methods for tissue modification
US755534315 Oct 200530 Jun 2009Baxano, Inc.Devices and methods for selective surgical removal of tissue
US757881913 Jul 200625 Aug 2009Baxano, Inc.Spinal access and neural localization
US773896815 Oct 200515 Jun 2010Baxano, Inc.Devices and methods for selective surgical removal of tissue
US773896921 Jan 200915 Jun 2010Baxano, Inc.Devices and methods for selective surgical removal of tissue
US774063115 Oct 200522 Jun 2010Baxano, Inc.Devices and methods for tissue modification
US785781329 Aug 200628 Dec 2010Baxano, Inc.Tissue access guidewire system and method
US788753813 Mar 200615 Feb 2011Baxano, Inc.Methods and apparatus for tissue modification
US791884915 Oct 20055 Apr 2011Baxano, Inc.Devices and methods for tissue access
US793883017 Apr 200610 May 2011Baxano, Inc.Powered tissue modification devices and methods
US795957731 Mar 200814 Jun 2011Baxano, Inc.Method, system, and apparatus for neural localization
US796391515 Oct 200521 Jun 2011Baxano, Inc.Devices and methods for tissue access
US80480804 May 20061 Nov 2011Baxano, Inc.Flexible tissue rasp
US806229816 Mar 200722 Nov 2011Baxano, Inc.Flexible tissue removal devices and methods
US806230016 Mar 200722 Nov 2011Baxano, Inc.Tissue removal with at least partially flexible devices
US809245613 Jan 200910 Jan 2012Baxano, Inc.Multiple pathways for spinal nerve root decompression from a single access point
US819243515 Oct 20055 Jun 2012Baxano, Inc.Devices and methods for tissue modification
US819243626 Nov 20085 Jun 2012Baxano, Inc.Tissue modification devices
US822139722 Apr 200917 Jul 2012Baxano, Inc.Devices and methods for tissue modification
US825735627 May 20084 Sep 2012Baxano, Inc.Guidewire exchange systems to treat spinal stenosis
US830351620 Apr 20116 Nov 2012Baxano, Inc.Method, system and apparatus for neural localization
US83667126 Dec 20115 Feb 2013Baxano, Inc.Multiple pathways for spinal nerve root decompression from a single access point
US839410225 Jun 201012 Mar 2013Baxano, Inc.Surgical tools for treatment of spinal stenosis
US839864127 Dec 201119 Mar 2013Baxano, Inc.Tissue modification devices and methods
US84092064 May 20102 Apr 2013Baxano, Inc.Tissue modification devices and methods
US841965316 Jul 200916 Apr 2013Baxano, Inc.Spinal access and neural localization
US843088117 Apr 200630 Apr 2013Baxano, Inc.Mechanical tissue modification devices and methods
US85510971 Nov 20108 Oct 2013Baxano Surgical, Inc.Tissue access guidewire system and method
US856841617 Aug 201229 Oct 2013Baxano Surgical, Inc.Access and tissue modification systems and methods
US857990226 Mar 201212 Nov 2013Baxano Signal, Inc.Devices and methods for tissue modification
US85857046 Oct 201119 Nov 2013Baxano Surgical, Inc.Flexible tissue removal devices and methods
US861374520 May 201124 Dec 2013Baxano Surgical, Inc.Methods, systems and devices for carpal tunnel release
US861716320 May 201131 Dec 2013Baxano Surgical, Inc.Methods, systems and devices for carpal tunnel release
US864734631 May 201211 Feb 2014Baxano Surgical, Inc.Devices and methods for tissue modification
US865213823 Sep 201118 Feb 2014Baxano Surgical, Inc.Flexible tissue rasp
US866322814 Sep 20114 Mar 2014Baxano Surgical, Inc.Tissue modification devices
US880162629 Dec 201112 Aug 2014Baxano Surgical, Inc.Flexible neural localization devices and methods
US884563711 Sep 201330 Sep 2014Baxano Surgical, Inc.Tissue access guidewire system and method
US884563914 Jan 201130 Sep 2014Baxano Surgical, Inc.Tissue modification devices
US910138625 Oct 201011 Aug 2015Amendia, Inc.Devices and methods for treating tissue
US91256821 Feb 20138 Sep 2015Amendia, Inc.Multiple pathways for spinal nerve root decompression from a single access point
US92479524 Jan 20112 Feb 2016Amendia, Inc.Devices and methods for tissue access
US93142531 Feb 201319 Apr 2016Amendia, Inc.Tissue modification devices and methods
US932061825 Oct 201326 Apr 2016Amendia, Inc.Access and tissue modification systems and methods
US934549113 Feb 201424 May 2016Amendia, Inc.Flexible tissue rasp
US935174115 Nov 201331 May 2016Amendia, Inc.Flexible tissue removal devices and methods
US945682910 Jun 20134 Oct 2016Amendia, Inc.Powered tissue modification devices and methods
US94630293 Mar 201411 Oct 2016Amendia, Inc.Tissue modification devices
US946304115 Dec 201511 Oct 2016Amendia, Inc.Devices and methods for tissue access
US94921513 Aug 201515 Nov 2016Amendia, Inc.Multiple pathways for spinal nerve root decompression from a single access point
US20060089609 *15 Oct 200527 Apr 2006Baxano, Inc.Devices and methods for tissue modification
US20060089633 *15 Oct 200527 Apr 2006Baxano, Inc.Devices and methods for tissue access
US20060089640 *15 Oct 200527 Apr 2006Baxano, Inc.Devices and methods for tissue modification
US20060094976 *15 Oct 20054 May 2006Baxano, Inc.Devices and methods for selective surgical removal of tissue
US20060100651 *15 Oct 200511 May 2006Baxano, Inc.Devices and methods for tissue access
US20060122458 *15 Oct 20058 Jun 2006Baxano, Inc.Devices and methods for tissue access
US20060169112 *30 Jan 20063 Aug 2006Frank Armin CCutting blade for cutting sheet material
US20060258951 *13 Jul 200616 Nov 2006Baxano, Inc.Spinal Access and Neural Localization
US20070123888 *4 May 200631 May 2007Baxano, Inc.Flexible tissue rasp
US20070213735 *17 Apr 200613 Sep 2007Vahid SaadatPowered tissue modification devices and methods
US20070260252 *16 Mar 20078 Nov 2007Baxano, Inc.Tissue Removal with at Least Partially Flexible Devices
US20080086034 *29 Aug 200610 Apr 2008Baxano, Inc.Tissue Access Guidewire System and Method
US20080091227 *22 Aug 200717 Apr 2008Baxano, Inc.Surgical probe and method of making
US20080147084 *7 Dec 200719 Jun 2008Baxano, Inc.Tissue removal devices and methods
US20080161809 *3 Oct 20063 Jul 2008Baxano, Inc.Articulating Tissue Cutting Device
US20080242204 *12 Jun 20082 Oct 2008Grace Christopher Rmetal sanding devices
US20080275458 *27 May 20086 Nov 2008Bleich Jeffery LGuidewire exchange systems to treat spinal stenosis
US20080312660 *16 Jun 200818 Dec 2008Baxano, Inc.Devices and methods for measuring the space around a nerve root
US20090018507 *9 Jul 200815 Jan 2009Baxano, Inc.Spinal access system and method
US20090125036 *21 Jan 200914 May 2009Bleich Jeffery LDevices and methods for selective surgical removal of tissue
US20090129873 *12 Jul 200521 May 2009Grace Christopher RMetal sanding devices
US20090149865 *26 Nov 200811 Jun 2009Schmitz Gregory PTissue modification devices
US20090171381 *12 Jan 20092 Jul 2009Schmitz Gregory PDevices, methods and systems for neural localization
US20090177241 *13 Jan 20099 Jul 2009Bleich Jeffery LMultiple pathways for spinal nerve root decompression from a single access point
US20090204119 *22 Apr 200913 Aug 2009Bleich Jeffery LDevices and methods for tissue modification
US20100010334 *16 Jul 200914 Jan 2010Bleich Jeffery LSpinal access and neural localization
US20100321426 *17 Oct 200823 Dec 2010Kazuki SuzukiImage forming apparatus
US20100331883 *16 Jun 201030 Dec 2010Schmitz Gregory PAccess and tissue modification systems and methods
US20100331900 *25 Jun 201030 Dec 2010Baxano, Inc.Surgical tools for treatment of spinal stenosis
US20110046613 *1 Nov 201024 Feb 2011Gregory SchmitzTissue access guidewire system and method
US20110098708 *17 Apr 200628 Apr 2011Vahid SaadatPowered tissue modification devices and methods
US20110112539 *14 Jan 201112 May 2011Wallace Michael PTissue modification devices
US20110130758 *4 May 20062 Jun 2011Baxano, Inc.Flexible tissue rasp
US20110160731 *4 Jan 201130 Jun 2011Bleich Jeffery LDevices and methods for tissue access
US20110224709 *20 May 201115 Sep 2011Bleich Jeffery LMethods, systems and devices for carpal tunnel release
US20110224710 *20 May 201115 Sep 2011Bleich Jeffery LMethods, systems and devices for carpal tunnel release
Classifications
U.S. Classification407/29.11, 225/91, 76/116, 99/623
International ClassificationB24D15/00, B24D15/02
Cooperative ClassificationB24D15/02
European ClassificationB24D15/02