US1798974A - Offset and typographic-printing machine - Google Patents

Description

March 31, 1931. G. CORSE OFFSET AND TYPDGRAPHIC PRINTING MACHINE 3 Sheets-Sheet 1 Filed Dec.

i Q A v March 31, 1931. G. CORSE I 1,798,974

OFFSET AND TYPOGRAPHIG PRINTING MACHINE Filed Dec. '7, 1928 3 Sheets-Sheet 2 V/ ////,1, 1 V// ///}////////Al March 31, 1931 G. CORSE OFFSET AND TYPOGRAPHIC PRINTING MACHINE Filed Dec. 7, 1928 3 Sheets-Sheet 3 Patented Mar. 31, 1931 UNITED STATES PATENT OFFICE GASTON GORSE, OI PARIS, FRANCE, ASSIGNOR TO 'ETA'BLISSEMENTS L.- CHAMBON, OF

PARIS, FRANCE OFFSET AND TYPOGRAPHIG-PRINTING MACHINE Application filed December 7, 1928, Serial No. 824,479, and in France December 15, 1927.

This invention relates to an improved off set and typographic printing machine comprising a certain number of diflerent arrangements which can be employed either 5 singly or in groups without departing from the spirit of the invention.

According to the invention the cylinders of the machine are mounted on cross-bars each of which is secured in a removable fashion and at a suitable height on Vertical mountings. A series of holes can, for example, be made in the mountings and the securing bolts of the cross-bars can be passed through the suitable holes. This allows a simple and economical construction, as well as considerable margin in the sizes which can be treated by the machine. Moreover, the changing of the cylinders can be eifected individually in a much more practical method than in existing machines. On the other hand the movable cross-bars themselves may be utilized for the apparatus printing in off-set or in typogra y.

%or controlling the contact of the oifset cylinder with the printing cylinder and the counterpart or coacting impression cylinder these two latter cylinders are mounted on eccentric axes, which can be advantageously controlled by means of tangential screws.

It will be found convenient to mount on the contact rollers, and if necessary the distributrollers articulated levers: Two contact f ro ers can advantageously be arranged, each mounted on a pair of articulated levers, the said levers being jointed by a flexible connection such as. a spring and a distributing roller just resting on the two contact rollers. With this arrangement two contact rollers will come erfectly into contact with the printing cy inder, which has not always been the case in apparatus actually employed. In effect, those machines where the contact rollers are mounted on fixed levers, only one of these rollers comes into contact with the "printing cylinder, the other being in consequence meifective. I

In a suitable way of carrying out the invention the principal distributing roller and two auxiliary distributing rollersare ar- 50 ranged on levers pivoted on the axis of the principal roller. Each of the auxiliary rollers are carried on a group of two contact rollers mounted on pivoted levers held by springs which tend to draw the contact rollers towards one another.

In order that the invention may be fully understood, we will now describe it by reference to the accompanying drawing, in which Figure 1 isa side view of a machine for oilset printing, in accordance with the invention.

Figure'2 is a section on the line 2-2 of F igure 1, and

Figure 3 is a side view of the machine for typographic printing.

The machine shown in Figures 1 and 2 comprises a printing cylinder of suitable material, such as steehzinc, copper, etc., an offset cylinder 2 furnished with plastic material and a coacting impression cylinder 3.

The ink placed in the inkwell 4 passes sue ces'sively over the cylinder 5, the take-up cyllnder 6, distributor 7, inking roller 10, distributors 11, the pivoted inking rollers 12,

contact rollers 13, and arrives at the printing cylinder 1.

The inking rollers 10 and 12 are given a rec procating movement along the axis of the cylinders composing them in order to distribute the ink more uniformly.

The paper or material which is to receive the printing is passed for oil-set printing between the offset cylinder 2 and the coacting cylinder 3 and for typographic printing between the printing cylinder 1 and the said coacting cylinder 3.

The coacting cylinder 3 and the printing cylinder 1 (in the case of the off-set) are mounted on cross-bar supports 17 and 18 carrying eccentrics 14, operated by worm and worm-wheel which allow the regularization of the contact; the worms are operated by means of the hand- wheels 19, 20, 21 and 22.

To allow variation of the forms the crossbars 15, 16, 17 and 18 supporting the various cylinders may be displaced on their frames 8 and 9; they are secured at a suitable height by means of bolts passing into the holes pre- Viously made in the frames 8 and 9.

To allow the contact rollers 13 to operate in all positions the parts supporting them are pivoted and drawn together under the action of s rings or any other means.

is machine can be readily transformed for typographic printing by raising the ofset cylinder 2, putting the coacting printing cylinder 31 in place of the cylinder 2 and lowering the two upper cross-bars.

The machine shown in Figure 3 is similar to that of Figure 1, except as regards the offset cylinder which is dispensed with.

The printing cylinder 31 and the coacting impression cylinder 33 are mounted on cross- ' bars 48 and 49 secured to the frame 38.

The ink contained in the inkwell 34, passes over the cylinder 35, the take-up cylinder 36, distributors 37, the inking roller 40, distributors 41, the articulated inking rollers 42, contact rollers 43 and arrives on the printing cylinder 31.

The contact rollers 43 may be displaced in suitable sides in the levers 45. These levers may be pivoted around the points 46. Springs 47 tend to draw the contact rollers together, the rollers 42 resting thereon maintaming them separated.

The coacting impression cylinder 33 is mounted on an eccentric 44 the rotation of which is controlled by means of hand-wheels 50 and tangential screws 51.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is A printing machine comprising vertical standards, said standards having therein a series of holes, cross members secured to said standards h. ving movable means extending into said holes, an inking device and a printing cylinder mounted respectively upon said cross members, so that it is possible to displace the cross members to mount printing cylinders of various diameters, and consequently to print upon papers of different SIZES.

In testimony whereof I have signed this specification.

GASTON CORSE.

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