US1867529A - Rotary press and the like - Google Patents

Description

July 12, 1932.

F. C. E. JONES ROTARY PRESS AND THE LIKE Filed Feb. 15, 1950 Patented July 12, 1932 UNITED STATES FRANCIS CHARLES EDWIN JONES, F HOUNSLOW, ENGLAND ROTARY rnnss ANDTHE LIKE Application filed February 15, 1930, Serial No. 428,772, and in Great Britain February 23, 1929.

This invention relates to improvements in rotary presses and the like and particularly to the rotary relief printing press for which a patent was granted to me No. 1,7 32,846. In

a the practical application of the construction described in the specification of that patent, it has been found that there is a tendency sometimes for the paper'to tear in passing between the die roller and the counterpart in roller, or for the impression to be slightly blurred in efiect. This is usually considered due to inaccuracies of gearing employed when wear takes place or to the difference in diameters of cylinders, caused by the packing used in the process of making ready to obtain a clear impression.

According to the present invention I allow for such inaccuracies in gearingror in the drive generally or varying diameters of cylinders by permitting the driven roller to have a limited floating action with respect to the gear pinion by which it is driven. This is effected bv providing the counterpart roller with a pin adapted to engage with a 2- slot in the face of the gear pinion, throughwhich it is driven, said pinion being mounted freely upon its shaft and driven from the gear pinion rigidly mounted on the die roller shaft. A. friction brake is provided working on the counter-part roller to keep the pin normally at the working end of its slot.

The invention will now be more particularly described by way of example in the acconipanying drawing which shows its application to the relief stamping press described in the specification of my Patent No. 1,732,- 846. r

In the drawing,

Fig. l is an end view of the gear pinion driving the counter-part roller, die roller,

and inking rollers.

Fig. 2 is an end elevation of the counterpart roller.

Fig. 3 is a part sectional side elevation of the counterpart roller assembly.

Fig. 4 is an end elevation showing the friction brake mechanism for the counterpart roller.

Referring to the drawing, A is the gear pinion for the counterpart roller. B is the pinion for the die roller, and C the pinion for the inking roller. D is the counterpart roller proper having slightly enlarged ends E, in one of which is threaded the pin F. Said pin engages in a concentric slot G formed in the gear pinion A so that the counterpart roller is capable of individual floating motion relative'to the pinion A and determined by the length of the slot G. Thus inaccuracies in the gearing which lead to faulty registration between the die and the counterpart are compensated for in this construction by the counterpart roller being permitted this individual motion relative to its driving pinion. V

For the purpose of returning the pin F to the gear or working end of the slot G during the time when there is no sheet in the machine, I provide the shaft H of the v counterpart roller beyond the journal J with 7 0 a pulley K over which passes a belt L. The end of the belt L is securedto a pin M threaded into the framework of the machine, and the other end of the belt carries a weight 0 so that the whole assembly forms a friction brake the effect of which is to retard the rotating of the counterpart roller D to enable the driving end of the slot G to again engage the pin F.

The invention is also applicable to intagv lio printing machines and to other processes such as embossing in which material is passed between two rollers and in which it may be essential that the peripheral speed of the rollers should be the same.

I claim: 7

1. Improvements relating to rotary presses applicable to printing and the like, comprising in combination a die roller, a t counterpart roller, a driving gear pinion fast upon the spindle of said die roller, a driving gear pinion loose upon the spindle of said counterpart roller, a concentric slot in said last-named driving gear pinion, a pin in said 7 counterpart roller, said slot being adapted to receive said pin and permit of floating movement of said counterpart roller when a sheet is in the press, a pulley mounted upon said counterpart roller spindle and a loaded belt passing over said pulley and adapted to restore the counterpart roller to its original position when said sheet has been removed.

2. Improvements relating to rotary presses applicable to printing and the like, comprising in combination a die roller, a counterpart roller, a driving gear pinion fast upon the spindle of said die roller, a driving gear pinion loose upon the spindle of said counterpart roller, a concentric slot in said last- 7 named driving gear pinion, a pin in said counterpart roller, said slot being adapted to receive said pin and permit of floating movement of said counterpart roller When a sheet is in the press, a pulley mounted upon said counterpart roller spindle and a belt passing over said pulley, one end of said belt being attached to a Weight and the other end to the press frame.

' f FRANCIS CHARLES EDWIN JONES.

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