|Publication number||US2864208 A|
|Publication date||Dec 16, 1958|
|Filing date||Apr 15, 1957|
|Priority date||Apr 15, 1957|
|Publication number||US 2864208 A, US 2864208A, US-A-2864208, US2864208 A, US2864208A|
|Inventors||Wilbur Ringer Floyd|
|Original Assignee||Wilbur Ringer Floyd|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (4), Classifications (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Dec.'16, 1958 F. w. RINGER ALUMINUM BLOCK SANDPAFER HOLDER Filed April 15, 1957 INi/ENTOR in er BY 1M ATTORNEYS uuuuumu uuuuuu u United States Patent 2,864,208 ALUMINUM BLOCK SANDPAPER HOLDER Floyd Wilbur Ringer, Salina, Kans. Application April 15, 1957, Serial No. 652,918 1 Claim. (Cl. 51-487) The present invention relates to aluminum block sand paper holders, and more particularly to such devices used in the preparation of film for splicing.
The primary object of the invention is to provide an aluminum block sandpaper holder which, being nonmagnetic, will be free from the magnetic particles removed from film having magnetically recorded sound carried thereon.
A further object of the invention is to provide an aluminum block sandpaper holder having a size somewhat smaller than the width of- 35 mm. film for convenience in using, storing, and seeing the end of the film as the sanding operation is conducted.
A further object of the invention is to provide an aluminum block sandpaper holder which is adapted to hold a plurality of sandpaper sheets for successive use, and which is inexpensive to manufacture, simple to use, and completely effective in accomplishing the above objects.
()ther objects and advantages will become apparent in the following specification when considered in the light of the attached drawings, in which:
Figure 1 is a top plan view of the invention.
Figure 2 is a fragmentary plan view of a strip of 35 mm. film from which the emulsion has been removed by the invention.
Figure 3 is an enlarged side elevation of the invention.
Figure 4 is a vertical cross-section taken substantially along the line 4-4 of Figure 3, looking in the di rection of the arrows.
Figure 5 is abottom plan view of the thumb screw portion of the invention.
Figure 6 is a perspective view of one of the sandpaper sheets shown folded into position for attachment to the invention.
Referring now to the drawings in detail wherein like reference characters indicate like parts throughout the several figures, the reference numeral 10 indicates generally an aluminum block sandpaper holder constructed in accordance with the invention.
In the splicing of motion picture film strips, the production of a strong joint is absolutely necessary if the film is to serve without future failure. Satisfactory splices demand careful scraping with complete removal of the emulsion and binder coatings from the film base.
On some types of color film, the coatings are on both sides of the film so that scraping of both surfaces to be joined is required. In all cases, the surfaces to be joined must be thoroughly cleaned, hence, if the back surface contains only a slight film of oil some difficulty may be encountered in obtaining successful splices.
Sometimes this factor is overlooked and poor splices are mistakenly attributed to the particular cement used, the splicing equipment, or to the film base itself. If the film base is roughened on both the back surface and front surface following the removal of the emulsion and hinder, the adhesive qualities, of the cement used will be materially improved and the finished joint will have exceptional strength.
In the instant invention, the aluminum sanding block 10 is utilized to remove the emulsion and binder from the area 11 of a film strip 12 across one end thereof so as'to prepare the film strip 12 for the splicing action.
The aluminum block sandpaper holder 10 comprises a generally rectangular block 13 having spaced parallel side walls 14, 15, spaced parallel end walls 16, 17, a bottom wall 18, and a top wall 19. A threaded bore 20 extends through the center of the top wall 19 downwardly through the bottom wall 18, as best seen in Figure 4.
A thumb screw, generally indicated at 21, includes a threaded shank 22 adapted for threaded engagement in the threaded bore 20. A disc 23 is integrally formed on the upper end of the threaded shank 22 in axial alignment therewith and extending perpendicularly thereto. A transverse handle 24 extends upwardly from the disc 23, as best seen in Figure 3, and has the opposite side surfaces thereof roughened as at 25 to provide a secure finger grip. The opposite sides of the handle 24 are provided with reinforcing blocks 26 which extend to the disc 23 to assist in securing the handle 24 thereto.
The lower face of the disc 23 is provided with a downwardly offset annular flange 27 to form one jaw with the top surface 19 of the block 13 forming the other jaw between which is clamped the opposite ends 28 of a strip of sandpaper 29.
A plurality of sandpaper strips 29 may be superposed and clamped between the flange 27 and block 13, simultaneously and successively torn loose as they become worn.
Having thus described the preferred embodiment of the invention, it should be understood that numerous structural modifications and adaptation may be resorted to without departing from the scope of the appended claim.
What is claimed is:
An aluminum block sandpaper holder comprising a rectangular body having spaced parallel side walls, spaced parallel end walls arranged perpendicularly to said side walls, a top wall, and a bottom wall arranged in spaced parallel relation to said top wall with said top and bottom walls perpendicular to said side and end walls, said body having a threaded bore extending centrally through said top wall, said body and centrally through said bottom wall, a thumb screw including an elongated threaded shank detachably engaged in said threaded bore, a disc integrally mounted axially on one end of said threaded shank and extending perpendicularly thereto, a handle integrally carried by said disc and extending therefrom oppositely from said threaded shank, and an integral annular flange depending from said disc adjacent the peripheral edge thereof oppositely of said handle, said flange and the top wall of said body cooperating to clamp therebetween the opposite ends of a sandpaper strip wrapped around said body.
References Cited in the file of this patent UNITED STATES PATENTS 1,520,642 Giroux Dec. 23, 1924 1,722,183 Thomas July 23, 1929 2,036,107 Thomas Mar. 31, 1936 2,417,680 Decker Mar. 18, 1947
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1520642 *||Oct 5, 1923||Dec 23, 1924||August Giroux Gilbert||Sandpaper holder|
|US1722183 *||Apr 29, 1927||Jul 23, 1929||Thomas John R||Handgrip or holder|
|US2036107 *||May 15, 1935||Mar 31, 1936||Thomas Mary D||Holder|
|US2417680 *||Apr 28, 1944||Mar 18, 1947||Black & Decker Mfg Co||Sanding pad|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3129541 *||Oct 29, 1962||Apr 21, 1964||Albert Field||Abrasive tools|
|US5140778 *||Feb 14, 1990||Aug 25, 1992||Louis Carruth||Support and stop for hand held sander to control depth and angle of cut|
|US6626747 *||Aug 2, 2000||Sep 30, 2003||Duraline Abrasives, Inc.||Abrasive pad|
|US20150306741 *||Oct 2, 2014||Oct 29, 2015||Simtastec||Systems, devices, and methods for sanding a surface using a sanding sleeve|
|U.S. Classification||451/521, 451/524|