US925942A - Sandpapering and polishing machine - Google Patents

Description

F. A. OEHM.

SANDPAPERING AND POLISHING MACHINE.

APPLICATION IILED SBPT.2. 1908.

Patented June 22, 1909.

2 SHEETS-SHEET 1.

AZORNEY r. A. OEHM. SANDPAPERING AND POLISHING MACHINE.

APPLICATION FILED SEPT. 2. 1908.

925,942, 7 Patented June 22, 1909.

2 SHEETS-SHEET 2.-

WITNESSES UNITED sTA Es PATENT OFFICE.

FRANKLIN A. OEHM, OF SAN FRANCISCO, CALIFORNIA.

SANDPAPERING AND POLISHING MACHINE.

To all whom it may concern:

Be it known that I, FRANKLIN A. OEHM, a c tlzen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Sand apering and Polishlng Machines, of whicfl the following is a specification.

My invention relates to a machine for sandpapering and polishing surfaces which require such finish, and pertains es ecially to a machine for giving a surface finish to moldrugs and like irregular surfaces.

The object of the invention is to provide a simple, practical machine which can be manufactured at a comparatively small cost, and which will operate on moldings and the like more efficiently than the machines now commonly in use, in that with my machine I am able to work into all the corners and angles of the surface to be polished, instead of rounding off these angles or failing to get into the rentrant angles as is now the case with the machines in use; also to render the machine readily adaptable for moldings of any width or thickness.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a side elevation of my machine. Fig. 2 is a front end View of same. Fig. 3 is an enlarged view of one end of the pressure shoe. Fig. 4 is a section on line XX of Fig. 3.

A. represents a frame of any suitable size, shape and material, supporting the working parts of the machine.

The polishing devices comprise a series of sections or blocks 2 suitably mounted on a suitable endless carrier 3 runnin over pulleys 4 whichlatter are appropriately mounted Specification of Letters Patent.

Application filed September 2, 1908.

Patented June 22, 1909.

Serial No. 451,408.

These polishing blocks may be attached to the carrier in any suitable way. Preferably they are secured to the outer surface of the belt by means of metal plates 6 which are secured to the belt, and which lates have their ends bent outwardl from t e belt and over the sides of the b ocks with the extremities of the plates 6 bent inwardly to provide flanges 7 which engage in corres onding lateral grooves 8 in the blocks.

he back of each block is provided with a transverse groove 9 in which suitable locking means, as the screws 10 passing through the belt and through a plate 6, engage. The plates 6 with their flanges 7 allow the blocks to be readily inserted in position on the belt before the belt is ut on to the machine, by simply bending tfie belt back and slipping the block on over the flanges 7; then by screwing in the screws 10 so as to engage in the grooves 9, any lengthwise dis lacement ofthe blocks after being assemb ed is prevented. This removability of the blocks is necessary, because after a certain amount of use the surface of a block becomes worn smooth so that the block has to be taken out and resurfaced with sandpaper or other abrasive material. Meanwhile, other blocks can be placed on the same belt and the machine continue its 0 erations. This method of attaching the b ocks to a flexible belt provides for the necessar articulation of the locks in passing aroun the pulleys 4.

The material or molding represented at 11, and which is to be olished, is supported on a suitable table or B through the machine in a contrary direction to the travel, and in the plane, of the pohshing members 2. The feed of the material is accomplished by an appropriate means, as the coacting feed ro lers 1314 at the head end of the machine. The lower feed roller is provided with a corrugated feeding surface and is adjustably mounted in the frame below the bedlate, as shownin Fig. 1. The upper feed ro ler 14 which is desi lied to bear on the irregular surface of the mo dlng 1s preferabl of soft rubber or other suitable compositlon which will adapt itself readily to tho elevations and depressionsof the molding. This feed roller 14 is adaptable to different thicknesses of material, by reason of the fact that it is journaled in a bracket 15 carried on the weighted arm 16 which latter issuitably fulcrumed, as represented at 16.

Appropriate motion is given to the feed two pulleys 1819. A belt 20 connects pulley 18 with another pulley 21, the'shaft of which latter has a sprocket around which runs a chain 22. his chain 22 passes around a sprocket on the shaft of the roller- 13 and thence around an idle sprocket 23. The shaft of sprocket 23 has a gear 24, Fig. meshing with gear 25 on the shaft of the roller 14. The result is that the contiguous surfaces of the feed rollers 1314 travel in the same direction. The shaft of roller 14 carries a sprocket 26 around which passes a chain 27 which runs back to a rear roller 28 of rubber or the like, by which the finished molding strip is discharged from the machine. The polishing carrier 3 is driven from the pulley 19 on shaft 17 by suitable connections, as the belt 29; it being understood that the blocks 2 in polishing contact with the molding travel toward the front of the machine, while the molding is .moving toward the rear.

The molding in passing through the machine is laterally supported between the guides 30,-31, one of which, as 31, is made adjustable by appropriate means, as the screws 32. The carrier 3 carrying the polishing blocks is adjusted to bear with the right pressure on the molding by appropriate means, as the shoe 33 which bears on top of the lower plane of the carrier, and which is adjustable up and down on'the frame by appropriate means, as the set screws 34 engaging in the slots 35 of the brackets 36 which carry the shoe. This shoe 33 has the downwardly projecting lateral guides 37'.38 one of which, as 38, is adjustable by means of the screw 39 to adapt the shoe to carriers and blocks of different widths.

It is understood that for different moldin 's a diflerent carrier and different type of po ishing block are required. Also, as moldings are of different thicknesses, I have designed this machine so as to adapt it to all practical purposes. Consequently, by raising or lowering the shoe 33 the machineis adapted to moldings and blocks of different thicknesses, and by moving the adjustable guide late 38 on' the shoe, and likewise adjusting t e guide 31 on the bed-plate, the ap aratus is ada ted to blocks and moldings 0' different wi ths.

Any appropriate form of belt-tightening means (not necessary here to be shown) may be employed in conjunction with one or other of the pulleys 4 to secure the right tension on the carrier 3, according to the adjustments up or down of the shoe 33.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a polishing machine, the combination of an endless traveling belt, a series of blocks having polishing surfaces corresponding in cross-section to the surface of the material to .be polished, said belt and blocks having co-acting flanges and grooves, a work support, and means for feeding the work. in a direction opposite to the travel of the belt.

2. In a polishing machine, the combination of .an endless carrier and a series of separable, independently removable polishing sections or'blocks, said belt and blocks having co-acting side flanges and grooves.

3. In a polishing machine, an endless belt provided with plates havin inturnedflanges, polishing sections or blocks having lateral grooves to fit the flanges, and locking means carried by the belt engaging transverse grooves in the sections.

4. In a polishing machine an endless belt provided with plates havin inturned flanges, polishing sections or bloc s having lateral grooves to fit the flanges, locking means. carried by the belt engaging transverse grooves in the sections, a work-supporting table with means for guiding and feeding the work to be polished to the sections, and a vertically adjustable shoe acting on the belt to press the sections on to the work.

5. In a polishing machine, an endless belt provided with plates havin inturned flanges, polishing sections or bloc s having lateral grooves to fit the flanges, locking means carried by the belt enga ing transverse grooves in the sections, a wor -supporting table with lateral guides engaging the sides of the sec- .tions, and means between the guides to accommodate the shoe or, varying the distance to different widths of belt and sections.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

FRANKLIN A. OEHM. Witnesses:

ENGELHARD OEHM. J. D. HEISE.

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