US1455172A - Foil-embossing machine - Google Patents

Description

'.1. PRUDHOMME FOILVEMBOSSING MACHINE Filed May 25, 192'2 E R e www No W gm @www Patent-ed 1il/ilay l5, 12223.,

OSEPH PRUDHOJIME, GF PQRTLAND, OREGON.

FOIL-EMBOSSNG MACHINE.

Application filed May 23, 1922'. `Serial No'.v 563.169.

To all whom tmc-y concern Be it hereby known that l, Joss-Pri PRED- HoMMn, a citizen of the United States, `and resident of ldortland, in the county of li/lultnoinali and tate of Oregon, have invent-ed a new and useful Foil-Embossing Machine, of which the following` is a specification.

This invention relates more particularly to printing machines known as web presses which are adapted to print on foils of tin, lead., aluminum, etc.

The object of invention is to provide an exceedingly simple, ellicient and inexpensive device which will einboss foil as it is drawn `from the roll to be printed, and to so construct the device that the usual expensive embossing rolls may be dispensed with and thereby permit numerous changes in the design of the embossing without the entailment of any ,great expense.

A further object is to improve the quality of the work and to malte saine more uniform throughout. i

l accomplish these results in the manner set forth in the following specification and illustrated in the accompanying drawing, in which:

Figure 1 is a. right side elevation showing the device attached to the foil receiving end of ay press, the press being shown in dotted lines. `Figure 2 is a front elevation of Figure 1 of which Figure 3 is a plan. Figure L1 is a left side elevation showing the gearing. Figure 5 is an enlarged detail showing the special embossing ro-lls.

Similar numbers of reference refer to the same or similar parts throughout the several views.

Referring in detail to the drawing, I have constructed my device as an attachment for the usual web press 10 having feed rolls 11 for drawing the foil 12 into the press. This foil 12, it will be understood, is now embossed on a separate machine and then rerolled before running through the printing press.

Referring more particularly to my device l have constructed same of a pair of side frames 13 and 1Ll. which have inturned base members 15 which are secured to the press 10 by the bolts 16. Journaling in the bearings 17 on the frames 13 and 1d is the main shaft 13, one end of which is near the frame 14 and has secured on same a bevel gea-r 19 which meshes with and is driven by the bevel gear 2O on the shaft 21 which jour.'- nals in the standard 22 on the press 10. On the opposite end of the shaft 18 is secured the spur pinion whichfmeshes with and drives the spur `gear on the countershaft 25, which also journals in the frames 13 and 14. The-gear 2G on "the counter shaft 25 drives the embossing` roller shaf the ygear 23 on which shaft is secured an albor. or cylinder 29, on each end of which is placed a sleeve which isbeveled at the face 31 to hold an electrotype embossing plate 32 bearing on its surface 33 the desired embossing` forni. rllhe screws 34 clamp the sleeves 30 tightly to the cylindrical electroplate 32. Un the stationary shaft 35, which is held by the fra-mes 13 and 1L1, are placed the ai 36 which are held against movepie-nt toward the frames by the lpinned col- A'.rrs 3T.

Journaling in the arm 36 is the shaft 38 on which is placed the arbor 39 upon vwhich is secured a rubber roller L10 which is therefore able tos ving on the center of the shaft .within certain limits.

The ends L11 of the arms 36V are slotted to receive the eccentrics L12`on the eccentric shaft L13 which jour' als in theV frames 13 andgl. and the collar Lto are pinned on opposite sides of the journal for the shaft L13 vand hold same in place. The plates 46 separate the under sides of the eccentric L12 from the lower sides of the slotted ends L'l and the screws L17 regulate the impression on the roller L1() upon the electrotype cylinder Lil-2, the pressure being greatest when the lever LlLl is approximately in a vertical position as shown in Fig. 1.

A. foil roll rack is also used and consists of a pair of vertical rods 48 upon whose upper ends is mounted the foil roll spool shaft Lil-.9 which is braced from the members 13 and 14 by the rods 50. Extensions 51 of the rods L13 carry an idler spool 52.

The operation of my device is as follows: The roll 53 of the foil 12 is placed on-the shaft 49 and the foil carried over and under 'the rubber roller l() and downwardly against the member 32 while the lever is raised, which separates the rolls 32 and L1() then sags under the roll 53. after which the foil is carried over Jthe roller 52 to the rolls 11 ot the press 10.

lt will be seen that the rolls 11 being driven by the press will draw the foil as ret 27 through The eccentric operating lever L1L1" quired, and since the tensile strength ofthe foil issmall no tearing is experienced since all that the roll 1l must do is to pull up part of the slack 12A from the foil l2.

While the gearing in my device is adapted to drive the rolls at the same speed that the foil is used by the press it is practically impossible to prevent a gradual loss or gain in the slack 12A. However, the amount of slack 12A can be increased or decreased at will by the operator who raises the lever 44 and retards or accelerates the rotation of the roll 53 momentarily, after which the lever 44 is again pressed down.

It will be understood that under the pres-y ent methods a steel embossing roll is en-` graved and hardened and suilicient pressure is applied to cause a duplicate of the engraving to be formed in a soft steel companion roll. The cost of the original steel engraving is very high and requires a correct adjustment and impression to make the two rolls register properly.

It is evident that in my device the electroty'pe can be made flat and rolled to fit a round arbor, or can be made cylindrical without any seam in its circumference.

1 What I claim as new is:

l. The combination of a cylindrical electrotype'driven in unison with a printing press withk an adjustable roller adapted to press foil against said electrotype and to be frictionally driven by said electrotype.

2. The combination of a printing press with a power driven cylindrical electrotype, a rubber roller adjustably and rotatably mounted over said cylinder, gearing for driving said cylinder and roll in unison with the feed rolls of said press, and a rack` Lemire adapted to hold a roll of foil and to allow said foil to pass over said rubber roll then between said rubber roll and electrotype and then to said press feed rolls. v

3. printing press in combination with a foil embossing device arranged to draw said foil from a roll, emboss same and then permit it to fallloosely in front of the feed roll of said press, said embossing device consisting of a pair of frames secured to said press, a cylindrical electrotype Vjournaling in said frame, means for rotating said cylinder in unison with the feed of said press, a rubber roller above' said electro, swinging arm` members attached to said frames and supporting said rubber roll, a pair of eccentrics within slots in the ends of said arms, a shaft journaling in said frames and carrying said eccentrics, a lever for rocking said shaft, and a foil roll carryingl rack attached to said frames.

4. A printing press in combination with a foil embossing device consisting of a foil rack and pair of embossing rolls adapted to draw said foil from the rack and to emboss same, an idler roller means adapted to carry the embossed foil loosely to the receiving end of said -printing press.

5. The combination of a press feed mechanisin with an embossing device consisting of a foil roll rack, embossing rolls driven from said press and drawing said foil from said roll, and conveyor means for loosely supporting said foil until it reaches said press in a manner that only enough tension is exerted by the press feed rolls to pick up some of the slack in said foil.

JOSEPH PRUDHOMME.

Images