US83471A - Improvement in printing-presses - Google Patents

Description

E. CUMMINGS. PRINTING PRESS.

No, 83,471. Patented oon. 27, -1868.

.Tige/1,501: W

gister.

ROYAL OUMMINGS, OF NEWPORT, VERMONT.

.Lamm Patent No. 83,471-, dated 0mm 27, 186s.

IMPROVEMENT `IN PRIN TING-PRESSES.

Figure 1 is ay side sectional view of my. invention,`

taken in the line x x, iig. 2.

Figure 2 is a plan or top viewbf the same.

Figure 3 isan enlarged section of the same, takenin the line y'y, fig-2.

Figure 4`is an enlarged view of aportion of iig. 3.

Figure 5 is an enlarged section of a portion of ig.2, taken in the line z z.

Similar letters of reference indicate corresponding parts.

rlhis invention relates to a new and improved printing-press, of that class in which the paper is printed from a continuousroll, and both sides of the paper at one operation, or during a single passage of the paper through the press.

The Vinvention Vconsists in a novel 'arrangement of paper-feed rollers with reciprocating platens and press-' ure-cylinders, as hereinafter shown and described, whereby avery compact, simple, and eicient press is obtained, and one which is excellently well adapted for newspapers and book-work.

In the accompanying sheet of drawings, A represents the frame of the machine, which may be constructed in any proper manner, to support the working parts;

and B B represent two horizontal type-beds, which work on ways or guides a, in the frame A, one bed, B, being above the other,4 B', as shown clearly in g. l. The type-forms are placed on'thes beds, and each bed has a rack, at one side, which racks gear into toothedwheels c c', at one end of-pressure-cylinders O O', as shown in g. 1.

The upper bed, B, has a rack, d, attached to its under side, and this rack gears into the wheel c' of the lower cylinder C', which is also shown in fig. 1.

By this arrangement, motion is communicated from the upperibed, B, to the lower one, B', and to both pressure-cylinders O C', the upper bedB receiving its motion, by means of connecting-rods D D, from cranks E E, at the ends of a driving-shaft, F.

G is a roller on which the paper, H, to be printed is rolled, and this paper passes over a roller, I, at one side of the lower pressure-cylinder O', underneath said cylinder, and over a roller, I', at .the opposite side of O', and then-upward, over, or around rollers, d' d', small in diameter, underneath another small roller, e, over a roller, J, atone side of the upper cylinder O, underp 'neaththe latter, and over av roller, J', at the opposite side of C, thence under a small roller, f, tothe shears or cutting-device which cutso the printed sheets.

It will be seen by referring to fig.4 1, that the press- ,ine-cylinders O C press the paper down upon the forms onthe platens),l and cause the impressions to be made on both sides ofthe paper. A

The motion o f the pressure-cylinders O O, and rollers-I I', J J', is intermittent, as they are rotated only when the platens B B are on-their forward movement, which is indicated by the arrows 1, and during which one impression is being taken.

During the return movement of the platens, the rollers above named are stationary, and consequently the paper is not moved.

This intermittent movement of the paper-feed rollers and pressure-cylinders is effected as follows.: The ,wheels o c' of the cylinders O C are placed loosely on their shafts Z dx, so that said wheelsfwill turn independently ofthe cylinders when the platens `B Bf are on their return movement, and thereby allow the cylinders-to remain stationary, -a casualmovement of the cylinders being prevented by pawls, 0X, attached to the frame A, engaging with projections fx at the ends of the cylinders opposite to that where the wheels c d are placed.

by the arrow 1, and the impressions are being. taken, thecylinder O C are rotatediu consequence of pawls g, attached to the inner sides of the wheels c c', coming in contact or engaging with projections h at the ends of the cylinders. (See more particularly fig. 3'.) On the shafts 'i' i', ofthe rollers I I', J J', there are placed, loosely, wheels jj', into which the wheels c c', ofthe cylinders G O', gear. The inner 4sides of these wheels have pawls, k, attached to them to engage with projections, l, at the ends of the rollers at the proper time, and cause said rollers to rotate and feed the paper alon 'I e pawls g k are thrown out free from the projections h l, of the cylinders C G', and rollers I I', J J', by means of buttons, m n, those ofthe pawls k' being pivoted or suspended, so that the pawls may pass them when the wheels j are turning backward, and n ot feeding the paper.

The buttons n of the wheels c c are xed, as the pawls g are not' required to pass them, a half revoluward'or printing-movement of the platens.

The cylinders C Oare cut or groovedlongitudinally their whole length, at two opposite points, as shown at o o in iig. 1, and these grooved surfaces stop succestheir return movement, will not bringthe type-form in contact with the paper.

By means 'of these buttons, m n, the pawls g k are disengaged fromthe cylinders O C', and rollers-I I', J

When the platens move in the directions indicated v tion only -of the cylinders C O being made at each forsively over the platens, so that the latter, in makingl J', a short time previous to the termination of the forward or Working movement -of the platens.

By this arrangement the peper is printed on both sides in its passage through the press, and by a very simple arrangement of means.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patentl. The pressure-cylinders C C', in connection with the reciprocating type-beds B B, and the paper-feed rollers I I', J J', all arranged to operate in the manner substantially and for the purpose set forth.

2. The combination of the two impression-cylinders O C', revolving in opposite directions above the reciprocating beds B B', with the peper-carrying cylinders l I', J J', substantiallv as described, for the purpose specified.

Witnesses: ROYAL CUMMINGS.

DAVID M. CAMP, 2d, JOSEPH FRANKLIN SARGENT:

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