US2382129A - Attachment for paper-cutting machines - Google Patents

Description

Aug. 14,1945.

J. R. BROUGHE R I ATTACHMENT FOR PAPER CUTTING MACHINES Filed Aug. 30, 1944 INVENTOR.

Patented Aug. 14, 1945 MACHINES {ATTACHMENT roR PAPER-CUTTING ".Jo hn RnBrougher, Calvert, Tex.

- f Application August so, 1944, Serial No. 551,872 :f lClaim. (o1. 164--94) This invention relates to an attachment for a paper cutting machine whereby a machine of that type can be utilized for performing various op-- erations for which separate machines heretofore have been necessary. For example, it -becomeS possible to convert :a paper cutting machine quickly through paper, for rounding the corners of sheets,

etc. Y

A further object of the inventionis to provide an attachment which can be quickly and securely placed in position for the purpose of converting the paper cutting machine to a paper punch or the like.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel steps in the method and certain details of construction and combinations of parts hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the method disclosed and in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

In the accompanying drawingthe preferred form of the invention has been shown.

In said drawing:

Figure 1 is a perspective view partly in section showing the present improvements combined with a portion of a paper cutting machine of the Diamond type such as manufactured by Barnhart Brothers and Spindler, and in general use in printing establishments.

Figure 2 is an enlarged view of the present improvements, partly in section and partly in elevation.

In paper cutting machines of the type mentioned there is provided, in connection with the bed of the machine, an adjustable back gauge, a side gauge, a clamping bar, and a cutter bar. The cutter bar cooperates with a cutter stick which is removably mounted in a groove formed in the bed of the machine. In the cutting operation the stack of paper to be cut is placed against the side and back gauges after they have been properly adjusted, after which the clampin bar is lowered on' to the paper. The cutter bar is then set in motion and moves downwardly through the paper to the cutter'stick, thereby severing the paper.

Heretofore the foregoing operation is the only one which has been performed by a. paper cutting machine and whenever it has been desired to punch holes in paper, to round the corners, to drill paper or perform other like operations, it

into a machine for-punching holes.

has been necessaryto invest considerable money for the purpose'of purchasing: machines designed:

to perform these particular operations. This has been prohibitive in small printing establishments and, consequently, the operations of such establishments have been limited.

As before indicated the present inventionis designed to enable the owner of apaper cutting machine to convert it so'that it'can be usedfor other purposes, such as punching holes, rounding corners, etc. ment to be placed in the cutter stick groove after the cutter stick has'ibeen removedjso that the attachment is in position for actuation by the paper clamp ordinarily found on the machine. In the drawing a portion of the bed of the machine has been indicated at A. A back gauge is adjustably mounted on the bed and a portion thereof has been indicated at B. The paper clamp remains unchanged and is operated in the usual way. A portion of the clamp, which is suspended above the cutter stick groove C, has been indicated at D. r

In the present case the attachment includes a block I proportioned to fit snugly but movably within the groove C and having a slot 2 extended thereinto with its bottom wall flush with the top of bed A, this slot being sufficiently high to receive the work to be cut or punched. Those sides of the block nearest the walls of groove C are recessed, as at 3, to receive clamping jaws or plates 4 mounted on the respective ends of an adjusting screw 5, the middle portion of which is rotatably mounted in a forked ear 6 extended from one wall of the block I and located in groove Cbelow the level of slot 2. A collar 1 is secured to the screw and is located in the forked ear 6, and this collar can be provided with one or more recesses 8 adapted to receive a pin or the like used for rotating the screw. The threads at one end of the screw are pitched oppositely to the threads of the other end of the screw and the two jaws are engaged by the respective ends .of this screw. Thus when thefscrew is rotated in one direction, the jaws will be moved apart and can be forced into clamping or frictional engagement with the opposed walls of the groove C, Whereas by reversing the rotation of the screw, the jaws can be drawn toward each other.

The upper portion of the block carries the element or elements to be used in punching or cut-- ting the paper. In the present case a punch 9 is slidably mounted in the block and is held normally above the groove 2 by coiled spring Ill. Any suitable means can be employed for limiting The invention includes an attachthe upward movement of the punch. For example, and as shown, the lower portion of the punch of operation to be performed. If a single hole is to be punched through a stack of paper, the attachment will be provided with a "single punch 10 in the slot;

as shown. If two holes or more are to be punched, two or more of the yieldingly supported elements) 9 can be used in the block. If the attachment is to be employed for rounding corners; there'cipro-" cating element could be in the form of a curved" 15* connected could be used for supporting anyknife mounted for sliding movement inthe block.

Thus, the owner of a paper cutting machine can be equipped with several attaclmients: each adapted to perform a particular operation.

gauges and with a portion in the'slot 2. The clamp D is then lowered in the usual way and will descend upon the upper end of the punch 9, forcing it downwardly through the material. By

6 raising the clamp the punch will be lifted by its spring andthe operation then can be repeated. By the term punch it is to be understood that reference is made to any kind of cutting or paper processing tool mounted. for reciprocation Furthermore, while one expansible attachment only has been, shown in position within the '"gr'oove C, it is to be understood that two or more of these exp'ansible clamping devices suitably selected type of paper processing'element.

' What is claimed is:

-' The: combination with the bed and movable paper clamps of a paper cutting machine, there When it is desired to use one of the attachmenta io bifiga cutter-stick groove in the bed beneath the jaws 4 are drawn;towardceach-other by rotatmgg. screw 5: inone direction. The attachment, iSi then placed inthe: groove 0 after the cutter stick-1 has been, removed and-is; at that theaclampsof an attachmentiremovably seated in the groove andl including: a block having a slot forzthereception of material tocbecut, jaws movablyimounted'at the: sidesaof.= the;block :and withtime directly beneaththe' clamp'Diordi naril-yused. 25 in the groove, means carried bysthe-block-for ad:

on a paper cutting machine; The-attachment is not fastened-inplacexuntilwafter it. has been properly; located qwith. respect to: the guides.- After it has been correctly positioned, theattachjustably connecting the jawsltolthe block, said jaws being; mounted forimovement, away from each other to. frietionallyengaggethenwalls of the groove, and a yieldingly supported paper cutting ment ,is secured by rotating screw 5; so; as to 30 element carried-by t e block and p ti ned for forcethejaws 4-outwardly against the walls ot the groove Thereafter the mate-rialto be perforated is placed ,onlzthe bed against the actuation bytheaclampa.

Images