US597048A - Paper-fastening for sander-cylinders - Google Patents

Description

2 Sheets8heet 1.

(No Model.)

M A BECK PAPER FASTENING FOR SANDER CYLINDERS.

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No. 597,048. Patented Jan. 11, 1898.

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1n: warm mm co. mom-Limo" WASHINGVON n r UNITED STATES PATENT FFlEE MATTHIAS A. BECK, OF lllILlVAUKEE, VISCOFSIN, ASSIGNOR TO THE MILYVAUKEE SANDER MANUFACTURING COMPANY, OF GREEN BAY, \VISGONSIN.

PAPER-FASTENING FOR SANDER-CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 597,048, dated January 11, 1898.

Application filed July 6, 1897. Serial No- 643,552. (No model.)

T0 all whom. it may concern:

Be it known that I, MA'rTHIAs A. BECK, of Milwaukee, in the county of Milwaukee and State of \Visconsimhave invented certain new and useful. Improvements in Paper-Fastenings for Sander-Cylinders; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The main object of my invention is to produce effective, reliable, and easily-manipulated means for fastening the ends of sandpaper to polishing-cylinders.

It consists, essentially, of a grooved bar or abutment and a tongued clam pin g-bar loosely fitted in a parallel groove or recess opposite said bar or abutment and provided at one end with a creasing-roller and also of certain novel details hereinafter particularly described, and pointed out in the claims.

In the accompanying drawings like letters designate the same parts in the several figures.

Figure l is a partial end elevation and partial vertical cross-section of a portion of a polishing drum or cylinder of a sanding-machine to which my improved papenfastenings are applied, the fastenings being cut transversely by the section in a plane indicated by the line 1 1, Fig. 2. Fig. 2 is a plan view of the clamping-bar constituting a part of each fastening, a portion. of the bar being broken away in order to show it in condensed space. Fig. 3 is a cross-section on the line 3 3, Fig. 2, showing the creasing-roller and its relation to the clamping-bar; and Fig. l is an end view of a part of the cylinder or drum to which the paper-fastenings are applied, the clamping-bars being removed.

For the purpose of illustration I have shown myimproved fastening in Figs. 1 and 4 as applied to a polishing drum or cylindeigwhich is provided with an automatic device for taking up slack in the paper and preventing folds or ridges therein when the machine is in operation; but I do not wish to be understood as limiting myself in the application of the fastening to this particular kind of a cylinder, as it is also applicable to others, al-

though it is particularly suitable and advantageous for use in connection with an automatic takeup of the general character shown in Fig. 1.

Referring to Figs. 1 and 2, A designates a portion of a polishing drum or cylinder of a sandpapering or polishing machine. It is formed or provided in one side of its periphery with a longitudinal slot a, through which the ends of the sandpaper, which is wrapped around the cylinder, are inserted. In a radhlly-disposed wall of the cylinder on one side of the opening ais formed a groove or recess a, opposite which is a grooved abutment or bar B.

Referring to Fig. 2, G is a clamping-barfitted in said groove or recess a, as shown in Fig. l, and formed on one side or edge with a tongue 0, which corresponds in shape and position with the groove in the bar B, but is made somewhat smaller or narrower than said groove to allow for the thickness of the paper to be pressed bysaid tongue into said groove without cutting or tearing the paper. In a recess formed in or near one end of said clamping-bar is journaled or pivoted a creasing-roller D, the periphery of which is shaped to correspond with and preferably projects slightly in advance of the tongue 0.

E E are springs for forcing the clam ping-bar with a yielding pressure toward the grooved bar or abutment B. These springs may be attached, as shown, to the clamping-bar or to the cylinder in the groove or recess in which the clamping-bar is inserted. The clamping bar may be made slightly tapering, as shown in Fig. 2, to facilitate its insertion into place and to insure its holding the paper securely at the end opposite the creasing-roller; but it may be made straight or of uniform width without material effect upon its operation. At the opposite end from the creasing-roller itis formed with a hole 0, in which a hook or other instrument for thrusting it into and withdrawing it from the cylinder may be inserted.

F designates the automatic take-up, which is formed with a groove or recess a. and provided opposite said recess with a grooved bar or abutment B, like or similar to those here- IGO of the take-up and, with the opposing bar or:

abutment B, constitutes the other or movable paper-fastening. The grooves or recesses a are openat oneor both'ends of the cylinder, as shown in Fig. i, to receive the clamping- .bars,which are .thrust'into them or withdrawn therefrom endwise, the ends with the creasing-rollers D being inserted first. The cylin der is provided with means, such as cams, (indicated by the dotted lines inFigs. 1 and 4,)

,to force the take-up F against the tension of i springs G away from the fixed paper-fastening for the purpose of inserting and securing the'otherend of the paper therein, one end of the paperbeing rfirst secured in the fixed fastening.

My improved fastening operates as follows:

The edge of the paper is thrust through the,

slot a in the cylinder between the recess a and the grooved barB, and the clamping-bar C is then thrust endwise into saidrecesswith the creasing-roller D in advance. This roller forms a crease or groove in the paper, pressing it into the groove in the opposing bar 13, and the tongue 0, following said creasingroller in the crease or groove formed thereby, securely binds the paper in the groove of said bar 13 from end to end. After securing one end of the paper in the fixed fastening it is wrapped around the cylinder and secured in like manner in the movable fastening applied to the take-up, which is held for the purpose away from the fixed fastening, as shown in Fig. 1, by the cams hereinbefore mentioned or other suitable means. When the paper is fastened iiierein, the take-up is released, as shown in Fig. 4, and pressed by the springs G toward the fixed fastening, thereby stretching the paper taut around the periphery of the roller and automatically taking up slack in the paper as it is produced by the operaation of the machine.

The fastenings heretofore employed in this class of machines in which the clamping-bars, moved longitudinally by screws, are forced by inclines laterally against opposing bars or abutments have been found uncertain and unsatisfactory in operation. lengthwise with great force by the operatingscrews they will clamp the paper securely only for a short portion of the length of the bar. My improved fastening effectually overcomes this difiiculty, and it requires only a moderate force to thrust the clamping-bar with the creasing-roller into place.

By the term sandpaper, as used herein,

Even when drawn I intend to include its obvious equivalents, cloth or paper having a surface provided with sand, emery, or other abrading material.

I claim.-' I

1. In a fastening for securing sandpaper to a polishing-cylinder, the combination with a grooved bar orabutment arranged lengthwise of the cylinder within its periphery, of a clamping-bar loosely fitted in a groove or recess opposite and parallel with'said grooved bar or abutment and provided at one end with acreasing-roller, substantially as and for the purposes set forth.

2. In a fastening for securing sandpaper to a polishing-cylinder, the combination with a grooved bar orabutment, of a clamping-bar loosely fitted in a groove or recess in the cylinder' parallel with said grooved bar or abutment, and formed with a tongue adapted to enter the groove in the opposing bar, a creasing-roller pivoted to said clamping-bar at or near one end thereof and having its periphery shaped to correspond with said tongue beyond which it projects slightly, and means for yieldingly pressing said clamping-bar toward said grooved bar or abutment, substantially as and for the purposes set forth.

3. The combination with a polishing-cylinder having a longitudinal slot in its periphcry, a grooved baror abutment and a groove or recess adjacent to and parallel with said slot, of a clamping-bar fitted to slide freely endwise in said groove or recess and having one edge or side fitted to enter the groove in the opposing bar or abutment, a creasing roller pivoted to said clamping bar inarecess therein at or near one end thereof, the periphery of said roller correspondingin shape and position with the working side or edge of said clamping-bar, and one or more springs arranged to press said clamping-bar toward the opposing bar or abutment, substantially as and for the purposes set forth.

4. The combination with a polishing-cylinder having a longitudinal slot in its periphery, and a yielding take-up device arranged adjacent to and parallel with said slot and movable transversely thereto, of fastening devices applied one to said take-up and the other to the cylinder opposite the take-up and each consisting of a grooved bar or abut ment, a clamping-bar provided at or near one end with a creasing-roller, the periphery of which is adapted to traverse the groove in the opposing bar or abutment when the clampingbar is thrust endwise into the cylinder, and one or more springs arranged to press the clamping-bar toward the opposing bar or abutment, substantially as and for the purposes set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

MATTHIAS A. BECK.

Witnesses:

OHAs. L. Goss, D. A. KELLEY.

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