US1340194A - Printing-press impression-cylinder - Google Patents

Description

J. J. WALSER. PRINTING PRESS IMPRESSION CYLINDERV APPLICATION man sarmzo, 1911. RENEWED JAN. 8. 1919.

Patented May 18, 1920. v2 SHEETS-SHEET l.

Jg W INVENTOR A RNEY J. J. WALSER.

PRINTING PRESS IMPRESSION CYLINDER,- APPLICATION FILED SEPT-20, 191?. RENEWED m. a, 1919.

1 ,340, 1 94;, Patented May 18, 1920.

2 SHEETS-SHEET 2.

2;? MENTOR ATTORNEY UNITED STATES PATENT OFFICE.

JOSEPH J. WALSER, OF CHICAGO, ILLINOIS, ASSIGNOR TO GOSS PRINTING PRESS COMPANY, A CORPORATION OF ILLINOIS.

PRINTING-PRESS IMPRESSION-CYLINDER.

Specification of Letters Patent.

Original application filed July 11, 1917, Serial No. 179,830. Divided and this application filed September 20, 1917, Serial No. 192,275. Renewed. January 8, 1919. Serial No. 270,249.

To all whom it may concern:

Be it known that I, JOSEPH J. WVALSER, a

citizen of theUnited States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Printing-Press lmpression-Cylinders, of which the following is a specification.

The invention relates to impression cylinders for printing presses and more especially to a cylinder designed to cooperate with plate or form cylinders which are adapted to carry varying numbers of plates circumferentially about the cylinder.

The particular objects and advantages of the invention will be pointed out in part in connection with the description of the present embodiment, and in part they will be obvious herefrom or may be learned by practice with the invention.

The invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

This application is a division of my application Ser. No. 179,830, filed July 11, 1917.

The accompanying drawings, referred to herein and constituting a part hereof, illustrate one embodiment of the invention, and together with the description serve to explain the principles thereof.

Of the drawings Figure l is an end elevation of the impression cylinder arranged for four or eight plates around on the form cylinder; and Fig. 2 is a similar view showing the impression cylinder arranged for five plates around on the form cylinder.

Certain kinds of printing presses are adapted and constructed to print upon sheets or webs difierent sizes of pages, or pages arranged either along or across the web, either with pages of the same size or of varying sizes as just described. In such presses, the form or plate cylinder is adapted to take diiferent numbers of plates consideredcircumferentially about the cylinder, and one ob ect of the present invention is to provide an impression cylinder adapted to cooperate with such a form cylinder.

As embodied and as illustrated by way of example in the accompanying drawings, the impression cylinder is adapted to cooperate with such a form cylinder carrying alternatively or interchangeably four, five or eight plates, considered circumferentia-lly about the form cylinder.

Referring more particularly to the illus trated embodiment, the impression cylinder is shown with its cylindrical surface divided longitudinally into a plurality of sections, marked respectively 1, 2, 3, 4L, 5 and 6, there being between each two adjacent sections a gap or opening extending longitudinally along the cylinder, said gaps being primarily for the purpose of permitting the passage or ingress and egress of the blankets, packing sheets, or other surfacing material for the impression cylin der, the holding and stretching mechanism being contained within the cylinder.

Along the side or disposed along each of the gaps, are means for detachably holding blocks or rails adapted to close the gaps, such blocks or rails having their outer sur face curved to form a continuation of the cylindrical surface, so that when a gapclosing block 1s in position at a particular gap, the gap is entirely closed and the sur-v face of the cylinder is unbroken and uniform past the gap. In conjunction with the foregoing, and in accordance with one feature of the invention, narrower blocks or rails are provided, which are interchangeable with the gap closing blocks or rails, but the narrower blocks are proportioned and dimensioned to leave the gap open to accommodate the blanket, packing sheet or other surface coverings of the impression cylinder Referring more in detail to the structures and mechanism just outlined, in the various recesses are shown, more or less diagrammatically the reels 7, upon Which the pack-- ing sheets, blankets or the like are wound. The illustrated form of fastening device for the other end of the impression cylinder covering comprisespins 8 set in the face of Patented May 18, 1920.

detachable and interchangeable blocks or bars 9 constituting part of the surface of the impression cylinder. Clamps 10 are mounted upon shafts 11, and press the cover sheets down over the pins 8 in a well known manner.

The blocks or bars 9 are seated in longitudinally disposed recesses 12 formed in the impression cylinder, the bars 9 being held in position by suitable means such as countersunk screws 13. The bars 9 are of such width that a gap is left between the bar and the opposite side of the recess in the impression cylinder, as is shown at a, b and d in Fig. 1. Through this gap the covering sheet for the segments of the impression cylinder pass from the fastening means to the reeling and stretching means in the next recess in the impression cylinder.

Interchangeable with the blocks or bars 9 are similar blocks or bars 1%, the blocks or bars 14:, however, being of sufficient width to entirely close the longitudinally disposed gaps in the impression cylinder. By interchanging the blocks or bars 9 and 14L, the size and arrangement of the continuous surface sectors or sections of the impression cylinder may be changed or varied, to correspond with changes in the size and position of the plates on the cooperating form cylinder. Thus, in the arrangement of the blocks or bars 9 and 1% shown in Fig. 1, the packing or blankets on the impression cylinder will extend from a to 7), from Z) to c, from 0 to (Z and from (Z to a, ma ring four equal sections in the surface of the impression cylinder, each such section being adapted to cooperate with one or two printing plates upon the form cylinder, and actually cooperating with two plates when there are eight plates around the form cylinder. r

By interchanging the block 14 at f with the block9 at a, and interchanging block 14 at 0, with block 9 at (Z, as shown in Fi 2, we would then have three sectors or sections in the surface of the impression cylinder, one extending from section 6 to section 7, another such sector or section extending from f to c, and the other from 0 to 6, thus two of the sections would be twice as large as the remaining one. The two larger sections would be adapted to cooperate with two plates upon the form cylinder and the small section with one such plate, that is, there would be five plates around the form cylinder.

Thus, by shifting the interchangeable blocks, the requisite variations may be made in the extent and location of the continuous bearing surfaces for cooperating with the plates as variously arranged, or as varying in number, on the cooperating form cylinder, and at the same time, and preferably by the same means, the blanket holding and stretching means are shifted and modified to suit.

It will be understood that changes may be made from the structures shown and described without departing from the principles of the invention and without sacrificing its chief advantages. I

lVhat I claim as my invention and desire to secure by Letters Patent is 1. A printing press impression cylinder including in combination the cylinder body having a plurality of gaps extending longitudinally along its cylindrical exterior and blocks adapted to close said gaps so as to present an unbroken cylindrical surface, and means for holding the blocks in the recesses, the blocks being shiftable from one gap to another.

2. printing press impression cylinder including in combination the cylinder body having a plurality of gaps extending longitudinally along its cylindrical exterior and blocks adapted to close said gaps so as to present an unbroken cylindrical surface, and means, including counter-sunk screws, for holding the blocks in the recesses, the blocks being shiftable from one gap to another 3. A printing press impression cylinder including in combination the cylinder body having a plurality of gaps extending longitudinally along its cylindrical exterior, a plurality of recesses formed in the cylinder along the edges of said gaps, and a plurality of blocks of different width adapted to be interchangeably seated in said recesses, some of the blocks being sufficient in width to close said gaps, and some of the blocks being of lesser width.

4. A printing press impression cylinder including in combination the cylinder body having a plurality of gaps extending longitudinally along its cylindrical exterior, a plurality of recesses formed in the cylinder along the edges of said gaps, and a plurality of blocks of difierent width adapted to be interchangeably seated in said recesses, some of the blocks being sufiicient in width to close said gaps, and some of the blocks being of lesser width, and means engagin the blocks and the recess to hold the blocks in position in the recess.

5. A printing press impression cylinder including in combination the cylinder body having a plurality of gaps extending longitudinally along its cylindrical exterior, a plurality of recesses formed in the cylinder along the edges of said gaps, and a plurality of blocks of different width adapted to be interchangeably seated in said recesses, some of the blocks being sufficient in width to close said gaps, and some of the blocks being of lesser width and means, including counter-sunk screws, engaging the blocks and the recess to hold the blocks in position in the recesses.

6. A printing press impression cylinder including in combination the cylinder body having a plurality of gaps extending longitudinally along the cylindrical exterior, a plurality of recesses formed in the cylinder along the edges of said gaps, and a plurality of blocks of different width adapted to be interchangeably seated in said recesses, some of the blocks being suflicient in width to close said gaps, and some of the blocks being of lesser width, and blanket holding devices carried by the narrower blocks.

7. A printing press impression cylinder including in combination the cylinder body having a plurality of gaps extending longi tudinally along the cylindrical exterior, a plurality of recesses formed in the cylinder along the edges of said gaps, and a plurality of blocks of different width adapted to be interchangeably seated in said recesses, some of the blocks being suflicient in width to close said gaps, and some of the blocks being of lesser width, and blanket stretching means within said gaps.

8. A printing press impression cylinder including in combination the cylinder body having a plurality of gaps extending longitudinally along the cylindrical exterior a plurality of recesses formed in the cylinc er along the edges of said gaps, and a plurality of blocks of different width adapted to be interchangeably seated in said recesses, some of the blocks being sufficient in width to close said gaps, and some of the blocks being of lesser width, and blanket stretching means within said gaps and including blanket holding means carried by the narrower blocks.

9. A printing press impression cylinder divided into sections and having a plurality of means for stretching packing over the surface of the cylinder, and means for varying the circumferential extent of the sections over which the packing is stretched.

10. A printing press impression cylinder divided into sections each section acting as an impression surface,.and means for changing the number of said sections from even to odd and vice versa.

11. A printing press impression cylinder divided into sections each section acting as an impression surface, and means for changing the number of said sections from even to odd and vice versa, and means for stretching packing over the Various sections whether even or odd in number.

12. A printing press impression cylinder having means for stretching packing over the surface of the cylinder and through a recess in the cylinder, and a block completely filling said recess peripherally in the cylinder when the packing stretching means is not in use.

13. A printing press impression cylinder adapted to cooperate with a form cylinder taking either an even or odd number of plates about its circumference, and means for stretching packing over the surface of the impression cylinder for distances varying in conformity to the number of plates on the form cylinder.

14. A printing press having a cylindrical printing couple comprising impression cylinder equipped with a plurality of means for stretching packing over its surface, said means being so located that the circumferential length of the sections of packing can be fixed to cooperate with the plates on the form cylinder when carrying either an even or an odd number of plates around its circumference.

15. A printing press impression cylinder equipped with a plurality of means for stretching packing over its surface, said means being so located that the packing can be put on in one or more sections, the one section extending all around the cylinder and the plurality of sections extending only partially around the cylinder.

16. A printing press impression cylinder equipped with a plurality of means for stretching packing over its surface, each of said. means including a stretching device within a recess in the cylinder and a block which can be inset into said recess in the circumference of the cylinder to make the circumference of the cylinder continuous over said means when not in use.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOSEPH J. WVALSER. lVitnesses J. F. KAEHLER, E. A. GRAHAM.

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