US943629A - Printing-press. - Google Patents

Description

W. F. S. PERRY.

PRINTING PRESS.

APPLICATION FILED APB..5,1909.

Patented Dec. 14, 1999. 2 SHEETS-SHEET 1.

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WILLIAM F. S. FERRY, OF PHILADELPHIA, PENNSYLVANIA.

PRINTING-PRESS.

Patented Dec. 14, 1909.

Original application filed July 15, 1908, Serial No. 443,694. Divided and. this application filed April 5, 1909. Serial No. 487,994.

To all whom it may concern:

Be it known that 1, WILLIAM F. S. FERRY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Printing-Presses, (the same being a division of my application, Serial No. 443,694, filed July 15, 1908,) of which the following is a specification.

This invention consists of a novel construction of printing machines of that general type in which the impression cylinder makes two revolutions for each impression, the essential object of the invention being to secure a machine which may be run at a greater speed than machines of a similar type at present in use, requiring less power for operation and which possesses many advantages from a practical standpoint as will appear more fully hereinafter.

In carrying out the construct-ion of the two revolution printing press comprising the present invention, a form cylinder, or rotary bed, is substituted for or used instead of the flat bed, track, bed motion, gears, and other parts such as used on the common flat bed press, said form cylinder being arranged directly under the impression cylinder and the operation of the two cylinders being properly timed so that the cylinders will move together to accomplish the printing operation in the actual use of the machine.

For a full understanding of the invention, reference is to be had to the following detail description, and to the accompanying drawings, in which Figure 1 is a side elevation of a rotary printing press embodying the essential features of the invention; Fig. 2 is a vertical longitudinal sectional view, showing in a diagrammatic way most clearly the peculiar formation of the peripheral portion of the form and impression cylinder, and Fig. 3 is a detail View of the eccentric portion by which the impression cylinder is depressed against the tension of the lifting springs and in order to cooperate with the form cylinder.

Throughout the following detail description and on the several figures of the drawings similar parts are referred to by like reference characters.

Referring particularly to the drawings and describing the specific construction the numeral 1 designates the impression cylinder and the numeral 2 the form cylinder, both of these cylinders being mounted upon shafts in the customary way and also being journaled in boxes supported by the sides of the frame 3 of the machine. The form cylinder boxes 4 are rigidly supported in the frame 3 and space rods 5 extend through each of the boxes 4 being secured at their upper ends to the adjacent impression cylinder box 6. A pair of rods 5 is employed for each box 6 and said rods are movable vertically through the adjacent box 4 in order that the impression cylinder 1 may be carried from not acting to operating position with respect to the form cylinder 2. The pairs of rods 5 are connected at the lower ends thereof by blocks 7 and peculiar eccentric operating devices shown in Fig. 3 of the drawing are utilized to depress the blocks 7 in order to lower or depress the impression cylinder during the printing operation. The eccentric motion will be described more clearly hereinafter. The impression and form cylinders are geared together and operated from a drive shaft 10, and the impression and form cylinder gears are designated 11 and 12 respectively. The springs 9 elevate the cylinder 1 at proper time. It is contemplated that the plates of the form cylinder be secured thereto in any suitable manner, this feature not forming a part of the present invention.

The impression cylinder 1 is provided with the usual grippers 13 carried by the gripper rod 14 and adapted to take the sheet from the feed table 15 in the customary way, the opening and closing of the grippers 13, however, being controlled by peculiar operating mechanism for the opening and closing pin which cooperates with the tumbler carried upon an end of the gripper rod 14. The gripper pin mechanism not forming a part of this mechanism will not be specifically described.

Both the impression and form cylinders are provided in the peripheral portions thereof with recesses or depressions 61 of peculiar form, said depressions ext-ending along about one-third of the circumference cylinder. During the rotation of the cylinders 1 and 2, as the cylinder 1 is depressed, the recesses 61 are adjacent to one another. During the further revolution of the cylinder the ends of the depression 61, which are formed so as to decline slightly as shown at 61 ride into contact with one another just before the plates of the form cylinder cooperate with the impression cylinder to print the sheet which is fed between said cylinder. Hence the inclined ends 61 of the depressions 61 virtually constitute cams causing the gradual contact of the operating surfaces of the cylinders 1 and 2, said cylinders being tight together by the time the sheet reaches the plate of the form cylinder. The provision of the depressions 61 makes the machine run much easier reducing the pull on the cylinders in a manner which is readily evident. The present machines can be run without mechanical injury or jar to the press or building in which it is located, the usual heavy flat bed not being employed and space being conse piently economized. The machine may of course be fed by hand or automatically, this being immaterial to the invention and it can be operated at a speed of from five hundred to thirty-five hundred impressions an hour. The form is rolled twice during each impression and this gives more light to the color in printing and decreases the pull on the press and rollers for the form requires continual flow of ml: which it does not receive 011 the fiat bed cylinder presses. The present machine em bodies, furthermore, several other advantages with reference to the construction and operation but the same are not set forth other than generally herein.

Reverting again to the operation of the impression cylinder by the peculiar eccentric motion illustrated in Fi 3 it ma 1 be observed that as the shaft 8 carrying the eccentric is given partial rotary movement by means of cam wheels 8", the impression eylinder 1 is lowered into cooperation with the form cylinder, and elevated at the proper time by means of the lifting springs 9. The operation of the eccentric or cam motion 8 is governed by suitable controlling means and which permit of throwing the eccentric into and out of operation under actual working conditions, and the rise or fall of the impression cylinder may be thus continued or discontinued at will.

The present machine is of course provided with suitable inking mechanism as well as sheet feeding and delivery mechanisms.

Having thus described the invention, what is claimed as new is:

In a printing press, in combination a form cylinder, an impression cylinder mounted above the form cylinder, lifting springs, supporting the impression cylinder, boxes in which the form cylinder is journaled, impressing rods connected with the impression cylinder and passing through the boxes of the form cylinder, means for exerting a downward pull on the said rods to lower the impression cylinder into operative relation to the form cylinder, the form and impression cylinders being provided in the peripheral portions thereof with matching depressions or recesses, ends of which are inclined to the larger peripheral portions, the

said depressions being caused to approach one another just before the printed sheet reaches the form, and inking mechanism.

lin testimony whereof I atlix my signature in presence of two witnesses.

lVILLIAM F. S. FERRY. Vitnesses:

linivuy K. Finns, T. E. Consuls.

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