US1696770A

US1696770A - Printing press

Info

Publication number: US1696770A
Application number: US194777A
Authority: US
Inventors: Charles F Lang
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-05-27
Filing date: 1927-05-27
Publication date: 1928-12-25
Anticipated expiration: 1945-12-25

Description

C. F. LANG PRINTING PRESS Filed May 27, 1927 ATTORN EY Patented Dec. 25, 1928.

UNITED STATES (mam F. LANG,-F CHICAGO, ILLINOIS.

rnm'rme ranss.

Application filed May 1927. Serial No. 194,777.

This invention relates to certain novel improvements in printing presses and more particularly to a device adapted'to be used in connection with the so-called feed roller.

In printing, presses of the prior art, the feed roller, which is the roller that carries the ink to the ink plate, has been carried on swinging arms and has been caused to rotate by frictional engagement with a member over which it is adapted to move. In the past, this memberhas been covered with a material such as leather, and oil, ink, and other foreign matter collected on this member and reduced the efficiency thereof to such a oint that the member ceased to function. ince the frictional engagement between this member and the roller is adapted to be such that the roller will rotate when passed over this member, it is apparent that if this member becomes slippery, such action will not take place.

It is therefore the salient object of my invention to provide a member with which the feed roller is adapted to have frictional engagement that will embody an arrangement whereby adegree of friction may be mamtained that will cause the feed roller to rotate under all conditions. r I

A further object of the invention is to sub- 30 stitute in place of the usual leather, a material which will be impervious to oil, ink, and other foreign matter.

Other objects will appear herelnafter.

The invention consists in the novel combination and arrangement of parts to be hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings, showing the preferred form of construction and in which:

Fig. 1 is a fragmental front elevational view of a printin press showing the feed roller and its relation to the ink plate;

Fig. 2 is a side view, partly in elevation and partly in section, of the parts of the device shown in Fig. 1; and v Fig. 3 is a perspective view of the preferred embodiment of my improvement.

In the drawings wherein the preferred embodiment of my invention is illustrated, it-

vided. This plate 12 reciprocates from the end of the press at whichthe impression plates are carried to the end of the press depicted in the drawings. In order to carry the ink from the fountain roller 11 to the plate 12 the feed roller 13 is provided. Sup

porting arms 14 are pivotally mounted at 15 a and are adapted to move the roller 13 from the full line position in Fig. 2 to the dotted line position in this figure. r

l/Vhen the ink plate12'is occupying the 2 full line position in Fig. 2 the feed roller and its supporting arms are occupying the full line position in this figure. As the plate 12 moves toward the fountain rollerll the arms 14 move the roller 13- up to the dotted line position and when occupying this posi- 4 tion the roller 13 willbe in engagement with the upper surface of the plate 12. Since the feed roller 13 engages the fountain roller 11 it is apparent that a film of ink will bepresent on the feed, roller and thereforewhen this roller contacts with the plate 12 a film oi. ink will be placed on the plate. As the plate 12 moves rearwardly it passes under a plurality of so-called distributing rollers 16 which tend to spread the ink evenly over the surface of the plate 12 so that the ink will be supplied to all points on the impression plates evenly.

It is necessary that different points on the feed roller 13 engage the fountain roller 11 and the plate 13 during the various phases of operation. If this does not take'place the feed roller 13 does not properly convey the ink to the plate 12, since the film of ink on this roller will be broken up very thoroughly at the same point. In order that the feed roller will contact with these members at difierent points, it is necessary that this roller be rotated during its upward movement. In order to accomplish this, a strip such as 17 is provided. As can be seen by referring to Fig. 1 the feed roller 13 is mounted on a shaft 18 and the portion 19 of this shaft which pro trudes beyond the feed. roller 13 engages the strip 17. Preferably the strip 17 is made of brake lining material although this is not necessary.

One end of the strip 17 is rigidly secured to the bracket 20 which embodies a foot portion 21 over which the strip 17 is directed. At the other end of the strip 17 a securing element 22 is provided and rigidly fastened to this securing element is the downwardly protruding rod 23 that extends through a portion 241 of the bracket 20. A spring'25 is provided between the portion 24 and securing element 22 that is adapted to be compressed when the securing element 22 moves downwardly. At the lower end of the rod 23 a nut 2'? provided and a spring 26 extends between this nut and the portion 24, said spring 26 acting in opposition to the spring 25. In order to insure contact between the portion 19 of the shaft 18 and the strip 17, a plurality of leaf springs 28 are provided between the strip 17 and the foot portion 21 of the bracket 20. These-deaf springs are held in posit-ion by the securing elements which secure the strip .17 to the bracket 20. As the shaft 18 moves upwardly the portion 19 will engage the strip 17 that is forced outwardly by the leaf springs 28 and therefore since the degree of friction between these members is high, good contact is issued and therefore the feed roller 18 will be caused to rotate for the purpose brought forth heretofore. Due to the resilient mounting of the strip 17 it is apparent that the leaf springs 28 will be able to function in a proper manner.

It is apparent from the foregoing that I have provided a device which will insure rotation of the feed roller 13 during each operation thereof and therefore ink will be supplied to the plate 12 in proper amounts.

WVhile I have illustrated and described the reoavvo preferred form of construction for carrying my invention into efiect, this is capable of variation and modification, without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire to protect by Letters Patent is: I i

1. In combination, an ink plate, a fountain roller, a feed roller mounted for swinging movement adapted to carry ink from said fountain roller to said plate, a shaftsupporting said feed roller, means adapted to frictionally engage said shaft to cause rotation thereof during said swinging movement, said means embodying a resilient portion for maintaining the frictional engagement be tween said engaging means and roller.

2. In combination, a shaft carrying a feed roller, a strip across which said shaft is adapted to roll, a bracket to which one end of said strip is rigidly secured, the other end of said strip being yieldably secured, and means carried by said bracket forcing said strip into engagement with said shaft.

3. A device of the class described, including, in combination, a bracket, a strip, one end of said strip being secured to a member protruding through said bracket for sliding movement therein, resilient means for tensioning said strip, and other resilient means carried by said bracket acting on the midportion thereof forcing said strip away from said bracket.

In testimony whereof I affix my signature.

OHARLE S F; LANG.