US1766807A - Cutting cushion for folding cylinders - Google Patents

Description

June 24, 1930. H. A. w. wooD CUTTING CUSHION FOR FOLDING CYLINDERS Filed Sept. 27, 1928 Patented June 24, 1930 STATES -UNETE HENRY A. WISE Woon, or NEW Yoan, N. Y.. 'Assis-Noa rro Woon NEWSPAPER Mln4 CEINEEY con-roEAfrIoN, or NEW YORK, N. Y., A CORPORATION or vvrnarNre CUTTING CSHION FOR FQLDI'ENGCYLINDERS Application filed September 27,1928. Serial No. 308,686.

This invention relates to the cushion usually formed of rubberl mounted on the folding cylinder of a folding couple for receiving the cutting blade on the cutting cylinder.

The principal objects of the invention are to provide for backing up the cutting cushion or rubber so as to make cutting easier; to provide a backing device Which can be turned easily so as to present a large number of surfaces to the knife as grooves are cut in it thereby; and to provide automatic means for continuously closing up the cut produced in the rubber. h

@ther objects and advantages of the nr vention Will appear hereinafter.

Reference is to be had to the accompanying drawing in Whichi Fig. l' is a sectional vievv of a folding couple showing the present invention and its operation;

Fig. 2 is a side view of the folding cylinder, and

F ig. 3 is a view similar to Fig. 1 showing a modification.

rdinarily the cushion or cutting rubber with which the folding cylinder of a folding couple is provided to receive the thrust of the blade of the cutting cylinder has such dimensions as to permit the knife to pass through a series of Webs and into the rubber repeatedly ivithout leaving an unduly large groove therein, but with the best that can be done the groove grows larger and larger and finally becomes too large to offer the proper resistance to the paper while being cut und it has tobe removed. While this groove is being Worn larger and larger there is a time when an irregular cut is obtained before the rubber is actually replaced. This irregular cut causes considerable trouble in the folder. With this invention these disadvantages are avoided.

Referring to Figs. 1 and 2, the folding cylinder 10 is shown as having the usual impaling pins l1. The usual cutting cylinder 12 is shown, and the usual cutting blade 13.. The cutting cushion 14 of soft rubber is located in a holder 15 having `projections `16 for holding the rubber. Behind the rubber is located a solid hacker. 17,' shovvnvin this case as a rod or cylinder of Wood or other material of a semi-hard nature which Will' not dull the cutting knife as most kinds of metal Would. Thisfills the space'betvveen the holder 15 and backs up the cutting. rubberfvvithvvhich it is in contact at two points y as indicated. l l

The introduction of this semi-hard'backer imparts considerable stiffness to the rubber=v lt in the ldirection of the cut. rThis condition is most desirable. It holds the rubberV up to its proper position in the cylinder and prevents its displacement inwardly. By having the rod 17 round it can be turned and Will present a'large number of surfaces r`to the knife as grooves become cut inthe rod; thus it lasts a long time. .y

.Of course the rubber becomes cut anyway and the groove Would have a tendency to grow Wider, but I have provided means-'for continuously closing in the groove left by. the frequent insertionl of the knife. This consists of a bar 20 pivoted onl a stud 21l and located circumferentially beyond the cutting rubber. y It has a projecting surface 22 Which takes the place of one side of the holder 15.

By meansl of a plunger 23 and a yspringQl l this bar is constantly forced inwardlyy and thus the rubber is moved inwardly slight# ly to. compensate for the groove cut in it.v In` this Way the advantages of vthe semihard'rubber, which issometimes employed to secure the desired stiffness, are retained and yet y the disadvantage of this hard rubber, A,Which lies in its stiffness and brittleness and results in. its early destructiomis avoided.` I secure a greater resistance to the cut than has been obtained heretofore with soft rubber, and. at the. same time the life of the rubber is" lengthened since the groove cut therein is continually and continuously being closed up.

In the form shown in F ig. 3, the backing piece of Wood 27 is made square and thus the advantages above mentioned are all secured, except that of being able to present different surfaces of the Wood to the knife. This .backing piece has to be replaced much more frequently than a cylindrical one does.

Although I have illustrated and described only tWo forms of the invention I am aware of the fact that other changes can be made therein by any person skilled in the art Without departing from the scope of the invention as expressed in the claims. Therefore I do not Wish to be limited to the exact form shown, but What I do claim l. The combination With a cutting blade, of a cushion for receiving the blade a carrier` or support for the cushion, and solid means behind the cushion for backing it up, capable of being turned to present different surfaces to the blade.

2. The combination with a cutting blade, of a soft rubber cushion for receiving the edge of the blade, a carrier or support for the cushion, and a semi-hard backer behind the cushion capable of being turned to present different surfaces to the blade.

3. The combination With a cutting blade, of a cushion to receive the blade, a carrier or support for said cushion, and a cylindrical backing rod located in the carrier behind` the cushion for backing it up and imparting stiffness to it.

4. rI`he combination with a cutting blade, of a soft rubber cushion to receive the blade, a carrier or support for said cushion, and a backing rod located inV the folding cylinder behind the rubber, capable of being turned to present different surfaces to the blade.

5. The combination Witha cutting blade, of a cushion, a carrier or support for the cushion, a solid backing piece behind the rubber for imparting stiffness thereto, and yielding means for pressing one side of the rubber toward the other and thus closingv the cut formed in the rubber.

6. The combination with a cutting blade, of a rubber to receive said blade, a carrier or support for the rubber, and yielding means for pressingone side of the rubber toward the other and thus always ytending to close the `cut formed in the rubber.

r. The combination With a cutting blade, of a cushion for receiving-the edge of the blade, a carrier or support for the cushion, the cushion being heldin fixed position on Olne Side@ riveted member engaging the opposite surface of the cushion, and means for forcing said member toward the cushion t0. tend to Close up'thevut farmed therein- S- The Combination with ,a Cutting blade afixed my signature.

HENRY A. Wise Woon.

Images