US1527299A - Printing press - Google Patents

Description

Feb. 24, 1925. I I 1,527,299

H. W. HACKER PRINTING PRESS Filed May 5, 1.924

Patented Feb. 24, 1925.

pairs srares HORACE W. HACKER, CHICAGG, ILLINOIS, ASSIGNOR 'IO HACKER MANUFACTURING (30., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PRINTING PRESS.

Application filed May 5, 1924. Serial No. 711,057.

To all 4.0710122 it may, concern:

Be it known that I, Honnon 1V. HACKER, a citizen of the United States, residing at Cl 'cago, in the county of Cool; and the State of Illinois. have invented a certain new and useful Improvement in Printing Presses, of which the following is a full, clear, concise, and exact description.

My invention relates to printing presses that are employed in color printing and which are provided with normally station ary registering pins in their plate supporting beds which serve, in conjunction with movable pins, to locate each plate of a series successively in exactly the same loca tion. These normally stationary pins are, in recent forms of presses, shit-table from place to place. Pincers have been employed to grip the projecting printing plate engaging ends of these pins for this purpose. with the result that the pins would become marred and rendered incapable of exactly position- .ing the plates. To obviate this undesirable result, the body portion of the noru'ially stationary pin has a reduced portion near and larger than the projection portion for the re ception of a removing tool. The pin receiving hole in the bed is laterally extended where the pin projects to afford access for the tool.

It sometimes happens that the projecting portion of the pin is not exactly coaxial with the body portion. I provide registering or complen ental indices upon the pin and the bed at the various holes which may receive the pin, so that the projecting portion of the pin may be easily brought to similar locations in the various holes.

The invention will be more fully eX- plained in connection. with the accompanying drawing in which Fig. 1. is a plan view of a portion of press having a plate supporting bed therein that carries plate positioning pins;

Fig. 2 is a sectional view on line 22 of Fig. 1;

Fig. 3 is a plan view, 011 a larger scale, of a part of the bed;

Fig. 4 is a view, on a larger scale, of a part of the structure as it appears in Fig. 2; and

Fig. :3 illustrates the method of dislodging the normally stationary pin.

The plate supporting bed 1 may be fastened upon the reciprocating member 2 of the press by any suitable means, such as the bolts 3.

The bed is formed with a number of holes l, one ot these holes being selected for the location of a pin 5 that is permanent tor a given series of impositions of printing plates 6. The bed is formed with a long groove which receives a block 8 that carries a pin 9. This block is adjustable in the groove so that after the fixedly placed pin 5 is snugly received in a selected hole 45 in the bed, the other pin 9 may be easily adjusted to enter another hole in the plate. whereby the plate is exactly held on the bed. Each pin has a larger body portion 10 intended to be coaxial with the reduced portion, but sometimes being out of true. it the pin. that is out of true is not located similarly in each of the holes .4: in the bed designed to snugly receive the body portion, the plates may be thrown out of register. I therefore form the bed at the pin receiving holes and the pin with registering or complement-a1 indices 11, 12.

The pin body portion is formed with one or more annular grooves 13 adjacent the reduced projecting end of the pin 5 and the pin receiving holes l are laterally extended where the pin projects as indicated at 14-, whereby adislodging tool 15 may be employed as indicated in Fig. 5.

Having thus described my claim 1. The combination with. a printing press bed,- of an upright pin having a body por tion slidably received in holes that are formed in the bed and a reduced portion projecting above the bed, the body protion having a reduced portion near and larger than the projecting portion for the reception of a removing toolf 2. The combination with a printing press bed; of an upright pin having a body portion slidably received in holes that are formed in the bed and a reduced portion projecting above the bed, the body portion having a groove adjacent the projecting portion to provide a tool engaging portion.

3. The combination with a printing press bed; of an upright pin having a body portion slidably received in holes that are formed in the bed and a reduced portion projecting above the bed, the body portion having a reduced portion near and larger than the projecting portion for the recepinvention, I

tion of n removing tool; the pin receivinp; holes in the bed being laterally extended where the pin projects to afford access "for the tool.

l. The combination with a printing press bed; of an upright pin having a body portion slidahly received in holes that are formed in the bed and a reduced portion projecting above the bed the body portion having it groove adjacent the projecting 10 portion to provide a tool engaging portion; the pin receiving holes in the bed being laterally extended Where the pin projects to afford access for the tool.

In Witness whereof, I hereunto sub- 15 scribe my name.

HORACE W. HACKER.

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