US3073084A

US3073084A - Sandpaper holders

Info

Publication number: US3073084A
Application number: US167051A
Authority: US
Inventors: Joel A Howard
Original assignee: Howard Hardware Products Inc
Current assignee: Howard Hardware Products Inc
Priority date: 1962-01-18
Filing date: 1962-01-18
Publication date: 1963-01-15
Anticipated expiration: 1980-01-15

Description

Jan. 15, 1963 J. A. HOWARD 3,073,084

SANDPAPER HOLDERS Filed Jan. 18, 1962 FIGA INVENTOR, JOEL A. HOWARD,

ATTORN EY.

United States atent flfice 3.-?3,84 Patented Jan. 15, 1953 3,073,084 SANDPAPER HOLDERS Joel A. Howard, Clitfside Park, N.J., assignor to Howard Hardware Products, Inc., Newark, N.J., a corporation of New Jersey Filed Jan. 18, 1962, Ser. No. 167,051 6 Claims. ((31. 51--187) The present invention relates to sandpaper holders commonly known as sanding blocks.

\An object of this invention is to provide a novel and improved article of the class mentioned, in which there is a flat backing member for the sandpaper and a top member offering a deformable handle of resilient nature, which is releasably attachable to the backing member; the feature being that the sand paper which is bent around the front and rear edges of the backing member is neither bent or cut into by the top member, because the sandpaper is not pushed into any channel structure, but its sole holding means is afforded by having the corner regions of the top member, press the sandpaper tight against the upper surface of the backing member. Also of importance, is that the leading part of the sandpaper on the work being sanded, is not an edge of the sandpaper.

Another object is to provide a novel and improved sandpaper holder of the kind described, which is simple in construction, reasonably cheap to manufacture, easy to use and efiicient in carrying out the purposes for which it is designed.

Other objects and advantages will become apparent as this disclosure proceeds.

For one practice of this invention, I provide an oblong sheetmetal backing plate having a right angle flange extending upwardly from both its shorter edges which shall constitute the front and rear ends of the device. Along each side edge, there is a channel whose ends are spaced some distance from said flanges; the longitudinal openings of said channels being directly opposite each other. The top member, initially a flat piece of sheetmetal of some resilient quality, is bent into omega-form to provide a lengthwise handle with coplanar, laterally extending plate portions below such handle. The top member thus formed, presents a rectangular two-part base of a little less in length than the distance between said flanges and of a little more in width than the distance the bottoms of said opposite channels. The remote side edges of said top member fit snugly in said channels respectively, upon assembly and the base of said top member contacts the top surface or does nearly so.

I will now give a detailed description of a preferred form of sandpaper holder embodying the teachings of this invention, by referring to the accompanying drawing, a part of this specification in which similar characters of reference indicate corresponding parts in all the views.

FIG. 1 is a perspective view showing that part of the sanding block which serves as the backing for the sandpaper.

FIG. 2 is a perspective view of the top part which is adapted to engage the backing part and at its corner regions, it holds the sandpaper pressed down tightly against the upper surface of said backing plate. This top member also provided a handle for the device along its length.

FIG. 3 is a fragmentary perspective view of a modified construction offering pressing tabs to hold the sandpaper clamped to the backing plate.

FIG. 4 is a lengthwise elevational block in assembled use condition.

FIG. 5 is a section taken at line 5-5 in FIG. 4.

In the preferred embodiment shown in the drawing, the numeral indicates generally a sandpaper holder comprising a one-piece oblong-shaped bottom member denoted view of the sanding generally by the numeral 16, offering a flat backing part 17 for the sandpaper sheet 18 whose end portions are held pressed down onto the upper surface of said backing part by the corner portions of a one-piece upper member designated generally by the numeral 19. Both said members are made of sheet metal, but the top member19 needs some resilient quality to effect its engagement and separation. The shorter ends of the bottom member each have an upward flange, and serve as the front and rear ends of the holder 15. These

flanges

20, 21 are preferably vertical or slightly upwards divergent in relation to the flat backing part 17 when the latter is horizontal. Each of the side edges of the bottom member 16 has a lengthwise channel whose open ends are at a suitable distance from said flanges. These

side channels

22, 23 have their longitudinal openings opposite each other and are enterable by sliding towards them on the top surface of the flat part 17. The upper piece 19 is made of a rectangular blank bent into omega-form to provide a split tubular handle lengthwise of the bottom member 16 when the side edges of the

coplanar feet

24, 25 are respectively entered into said channels. When so entered, the handle part 26 is deformed to a slightly smaller diameter and hence stressed.

To make the assembly for use, the sandpaper strip 18 is set smooth side against the bottom surface of the member 16 and its length is just suiiicient to have its end portions bent around the top edges and inner surfaces of the front and rear flanges 2t 21 and onto the top surface of the backing part 17 to end before the channel ends. The top member 19 is then held in hand and its handle 26 squeezed whereupon it is set between the covered flanges and released so that the longitudinal edges of the

feet

24, 25 are entered into the

channels

22 and 23 respectively. The length of the upper member should be such that it slide fits between the sandpaper-covered flanges of the bottom member so as not to cut into the sandpaper. The fit into the channels shall be such that the corners of the

feet

24, 25 tightly press the sandpapers end portions onto the top surface of the fiat backing 17. It is practical to make the dimension A about one-half an inch and the length of the sandpaper sheet about an inch and a half longer than the length of the bottom member 16 when the height of each

flange

20, 21 is three-sixteenths of an inch. These dimensions are mere suggestions.

The sandpaper strip or other abrasive sheeting used, is of course stretched taut when applied on the holder and for better hold therefor, the top member 19 may have elongated notches in each corner region between the handle and the side edges as at 27, so that each tab formed may be bent down a little, to afford greater pressing action, for such tabs will act as gripping fingers in the assembly.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the embodiments herein shall be deemed merely illustrative and not restrictive and that the patent shall cover all patentable novelty herein set forth; reference being had to the following claims rather than to the specific description herein to indicate the scope of this invention.

I claim: I

1. In an article of the character described, a flat, substantially rectangular bottom member having an upward flange along its front and rear edges respectively and a channel along an intermediate part'of each of its side edges above the bottom surface of said flat bottom member; the longitudinal openings of said channels being directly opposite each other and said flanges being in a nonconvergent relation upwardly from said flat bottom member; an abrasive strip in stretched condition being positioned against the bottom surface of said fiat bottom member and'each end portion of said strip being around and againstthe surfaces of said flanges respectively and so that thetop member is enterable between said flanges and channels; the side edges of said feet beting entered into said channels respectively and the corners of said feet pressing the end portions of said abrasive strip tightly against the top surfaceof said fiat bottom member; said top member being in loose fit between the abrasive material on the flanges and its feet being in snug lit in said channels.

2. An article as defined in claim 1, wherein each channel is formed by anupward flange along each side edge of the bottom member; such last mentioned flanges being in upwardly converging relation.

3. An article as defined in claim 1, wherein the top .member is of substantiallyrectangular shape as determined by its perimeter; said member being made of a flat blank bent into omega form. I

4. An article as defined in claim 1, wherein each member is made of a one-piece blank.

5. An article as defined in claim 1, wherein the top member is provided in each corner region with an elongated notch whereby a tab is formed at each such region.

6. An article as defined in claim 5 wherein each of said tabs is bent downwardly a bit so that they are stressed upon assembly of said members.

References Cited in the file o f this patent UNITED STATES PATENTS v Williams a Jan. 8, 1907 840,982 2,454,668 Nissenbaum Nov. 23, 1948 2,680,334- Howard June 8, 1954 FOREIGN PATENTS 835,002 Great Britain May 18, 19-60

Claims

1. IN AN ARTICLE OF THE CHARACTER DESCRIBED, A FLAT, SUBSTANTIALLY RECTANGULAR BOTTOM MEMBER HAVING AN UPWARD FLANGE ALONG ITS FRONT AND REAR EDGES RESPECTIVELY AND A CHANNEL ALONG AN INTERMEDIATE PART OF EACH OF ITS SIDE EDGES ABOVE THE BOTTOM SURFACE OF SAID FLAT BOTTOM MEMBER; THE LONGITUDINAL OPENINGS OF SAID CHANNELS BEING DIRECTLY OPPOSITE EACH OTHER AND SAID FLANGES BEING IN A NONCONVERGENT RELATION UPWARDLY FROM SAID FLAT BOTTOM MEMBER; AN ABRASIVE STRIP IN STRETCHED CONDITION BEING POSITIONED AGAINST THE BOTTOM SURFACE OF SAID FLAT BOTTOM MEMBER AND EACH END PORTION OF SAID STRIP BEING AROUND AND AGAINST THE SURFACES OF SAID FLANGES RESPECTIVELY AND EXTENDING SHORT OF THE ENDS OF SAID CHANNELS RESPECTIVELY, AGAINST THE TOP SURFACE OF SAID BOTTOM FLAT MEMBER AND A TOP MEMBER COMPRISING TWO SPACED COPLANAR FOOT ELEMENTS CONNECTED BY A CENTRALLY POSITIONED HANDLE ELEMENT HAVING SOME RESILIENT QUALITY TO BE DEFORMED TO REDUCE THE DISTANCE BETWEEN THE REMOTE SIDE EDGES OF SAID FEET SO THAT THE TOP MEMBER IS ENTERABLE BETWEEN SAID FLANGES AND CHANNELS; THE SIDE EDGES OF SAID FEET BETING ENTERED INTO SAID CHANNELS RESPECTIVELY AND THE CORNERS OF SAID FEET PRESSING THE END PORTIONS OF SAID ABRASIVE STRIP TIGHTLY AGAINST THE TOP SURFACE OF SAID FLAT BOTTOM MEMBER; SAID TOP MEMBER BEING IN LOOSE FIT BETWEEN THE ABRASIVE MATERIAL ON THE FLANGES AND ITS FEET BEING IN SNUG FIT IN SAID CHANNELS.