US2077790A

US2077790A - Method of and apparatus for printing on curved faced bodies

Info

Publication number: US2077790A
Application number: US18499A
Authority: US
Inventors: Hakogi Ichiro
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-07-25
Filing date: 1935-04-27
Publication date: 1937-04-20
Anticipated expiration: 1954-04-20

Description

April 20, 1937. l. HAKOC-il 2,077,790

METHOD OF AND APPARATUS FOR PRINTING ON CURVED FACED BODIES Filed April 27, 1935 l? a" 'I/IIIIIIIIIA VIIIIIIII/IIIIIII III/111111 INVENTOR. I,

lcmno HFIKOGI Patented Apr. 20, 1937 UNITED STATES zmmao METHOD OF AND APPARATUS FOR PRINT- ING ON CURVE!) FACED BODIES Ichiro Hakogl, mam Yoshino-cho, Higashi-ku,

. Nagoya,- Japan Application April 27, 1935, Serial No. 18,499 In Japan July 25, 1934 9 Claims.

This invention relates to offset printing apparatus and has special reference to a printing apparatus for oifset printing on hollow articles such as bowls or the like.

5 In printing of this character it is usual to employ a flexible blanket but much trouble is experienced in causing such a blanket to fit closely to all parts of the bowl or other article on which the impression isto be made.

10 One object of the present invention is to provide an improved form of offset printingapparatus wherein a close fit between the surface of the article receiving the printing and the blanket will be obtained.

15 A second important object of the invention is to provide novel means whereby the pressure of the blanket against the article receiving the impression is uniform throughout.

A third important object of the invention is to 20 provide a novel construction for this purpose wherein the article itself will be held firmly in position during reception of the impression.

A fourth important object of the invention is to provide a novel construction of such a device 5 whereby all air-pockets or layers are removed from between the blanket and the article whereon the impression is to be made.

With the above and other objects in view as will be hereinafter apparent, the invention con- 30 sists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawing and specifically claimed.

' In the accompanying drawing like characters 35 of reference indicate like parts in the several views, and: v

Fig. l is a cross-section through theimproved device showing an article in position to receive the impression.

40 Fig. 2 is a perspective view of certain details of the invention showing the manner in which pressure is applied.

Fig. 3 is a semi-diagrammatic perspective view showing a form of apparatus designed totrans- 45 fer theoriginal impression to the blanket,

Fig. 4 is a sectional view similar to Fig. 1 but showing a modification thereof.

In the form of the device as shown in Figs. 1, 2

and 3 it will be seen that the article upon which 50 theprinting impression is to be made is illustrated at i. A clamping ring 2 of sumcient size surround this article supports a blanket 3 which is preferably made of rubber. Thepressing device consists of a plate 3' actuated by ,a 55 plunger 34: which is reciprocating by a suitable mechanism in a vertical direction. On the un derside of the plate 3' there is provided a cushion 4 which is preferably of sponge rubber and the lower surface of 'which conforms, at least roughly,

to the interior of the bowl I. Connected with 5 the plate i is a suction pipe 5 of extensible and flexible material which leads to any suitable means for producing a partial vacuum and this pipe5 extends downwardly through the cushion 4 as at 6. The blanket I is provided with an opening I which registers with the lower end of the pipe 5 upon the pressing device being depressed so that when the pressing device is depressed on the blanket and the latter is forced into the article I a partial vacuum will be produced removing the air from between the blanket and the article I and thus causing the blanket to fit closely throughout its printing extent into the article. In order to, hold the article in position there is also provided a base l5 resting on a suitable support it and 'at the center of this base there is provided a pocket [5' wherein is located a suction cup l2 which engages at its upper edge beneath the center of the article or bowl i, and thus holds the said article or bowl firmly on top of'the base i5. This suction is connected by a pipe l3 to a suitable vacuum producing device,

not shown.

As shown in Fig. 3 the ring 2 is supported by clips 9 and 9' which are held by pneumatic cyl- I inders 8, the ring 2 being revoluble on the axis of one cylinder 8 so that the clip 9 is fixed to the ring 2 during the operation while the ring can slip in and out of the. clip 9' as it revolves about the axis of the cylinder 8. Also the same cylinder that carries the clip 9 carries a clip 9a which supports an auxiliary ring 2' swinging into and out of printing position over a longitudinally movable inking platen 8a which travels beneath inking rollers 8'. The ring 2 and ring 2 are 40 thus interchangeable in position. The cylinders 8 are supported on a rocking frame l0 suitably mounted as at ill to allow the blanket, when the trated as extending in a plane acrossthe ring but "when theair is exhaustedbelow the sponge rubbar member Ii" the blanket will fit into the bowl or article i as shown in dotted lines in that figure.

'At-:- the same time an maybe introduced at 5 from'a compressed air tank to produce pressure on top of the sponge rubber II' and thus insure a closer fitting. c

From the foregoing it will be seen that since the air is evacuated from beneath the blanket 3 the latter is caused. to fit closely on the interior of the bowl or article I. no matter what its shape, and in the form shown in Fig. 4 this is additionally aided by air pressure from above the sponge rubber member or cushion.

In operation after the impression from the transfer plate or platen 8a has been received on the underside of the blanket the transfer plate is moved to the right of Fig. 3 to pass beneath the inking rollers 8' and the bowl or other article, as indicated at 'I, is placed in position and there held by the suction cup l2; Then, through suitable manipulation of the pressing device 3' the blanket is forced downwardly and the suction through the pipe 5 draws the air out from between the blanket and bowl or article and causes the blanket to fit throughout on the article thus giving a uniform impression, this being assisted by the action of the sponge rubber cushion} as in-Fig. 1 and II' as in Fig. 4.. I

There has thus been provided a simple and efilcient device of the kind described and for the purpose specified.

in the form and construction of the invention without departing from the material spirit thereof.- It is not, therefore, desired to confine the invention to the exact form herein shown and described, but it is desired to include all such as properly come within the scope claimed.

I claim:

1. In a device for the purpose described, a su porting ring, a flexible and elastic blanket carried by said ring, a presser member vertically reciprocable above said blanket and having a highly elastic cushion adapted to engage and depress said blanket, and a suction pipe extending downwardly through said presser member, said blanket having an opening therein registering with the lower end of said pipe upon depression of the Presser member.

2. In a device for the purpose described, a sup Porting ring, a flexible and elastic blanket carried by said ring, a presser member vertically reciprocable above said blanket and having a highly elastic cushion adapted to engage and depress said blanket, a'suction pipe extending downwardly through said presser member, said blanket having an opening therein registering with the lower end of said pipe upon depression of the presser member, and a pressure pipe opening into the presser member above said highly elastic cushion.

3. In a device for the purpose described, a supporting ring, a flexible and elastic blanket carried by said ring, a presser member vertically reciprocable above said blanket and having a highly elastic cushion adapted to engage and depress said blanket, a suction pipe extending downwardly through said presser member, said blanket having an opening therein registering with the lower end of said pipe upon depression of the presser member, .and means tofirmly support an article concentrically below said ring 4. In a device for the purpose described, a supporting ring, a flexible and elastic blanket carried by said ring, a presser member vertically reciprocable above said blanket and having a highly elastic cushion adapted to engage and depress saidblanket, a suction pipe extending downwardly through said presser member, said blanket having an opening therein registering v depress said blanket, a suction pipe extending downwardly through said presser member, said blanket having an opening therein registering with the lower end of said pipe upon depression of the presser member, an article support mounted concentrically below said ring, and a vacuum cup carried by said support and engageable with an article on the support to hold the same firmly thereto.

6. In a device for the purpose described, a sup porting ring, a flexible and elastic blanket carried by said ring, a presser member vertically reciprocable above said blanket and having a highly elastic cushion adapted to engage and depress said blanket, a suction pipe extending downwardly through said presser member, said of the presser member, a pressure pipe opening into the presser member above said highly elastic cushion, an article support mounted concentrically below said ring, and a vacuum pump carried by said support and engageable with an article on the support to hold the same firmly thereto.

7. That method of offset printingupon curved faced bodies which consists in stretching an elastic offsetblanket above the body, producing elastic offset blanket above the body to receive the printing and in contact with the rim thereof, thereby forming a tightly closed air space between the surface of the body and the oifset blanket, evacuating the air from said air space and thereby bringing the offset blanket into close contact with the surface to receive the printing.

rcrnao HAKoI.