US30243A - pelletreau - Google Patents

Description

UNITED STATES PATENT QFFICE.

M.. x. PELLETREAU, 0F New YORK, N. Y.

BOOKBINDERS STANDING PRESS.

Specification of Letters Patent No. 30,243, dated October 2, 1860.

To all. 'whom it may concern:

Be it known that I, M. K. PELLETREAU, of the city, county, and State of New York, have invented a new and useful Improve-4 ment in Bookbinders7 Standing Presses; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l, is a side elevation. Fig. 2 an end elevation. Fig. 3 a plan section.

Similar letters of reference indicate corresponding parts inthe several figures.

The general form of this press is similar to those in common use. The frame consists of solid top and bottom pieces of oblong form A, A', separated by rods A2, at each corner made in the usual manner. Passing through the center of the top piece A, is a strong screw H, by which the compression is obtained, the interior of the top piece A, being provided with a nut which fits the screw H. The lower part of the screw H, is connected by a loose joint with the upper follower I, which is made to rise and fall between the rods A2, by means of its connection with the screw H, the connection being such that as the screw rotates and thus rises or falls the follower I, will be correspondingly elevated or depressed. Rotation is given to the screw I, by means of a lever J, the inner end of which is made to encircle the lower part of the screw I, which latter is provided with a double ratchet, and within the extremity of the lever J, there is a spring pawl which engages the ratchet so that by shifting the pawl and applying power to the lever J the screw I, may be rotated in either direction as may be desired.

The foregoing parts are all constructed and arranged in the usual manner so that no further description of them is necessary.

My improvement relates to a means of elevating and depressing the bottom follower A3, which like the upper follower I, is arranged to rise and fall between the rods A2, and is guided and supported in its vertical movement by the cogged side bars G. These are strong bars extending from the top piece A, to the base A', and provided on one of their sides with a cogged rack F. The ends of the followers I, A3, are provided with projections c which fit into corresponding grooves in the bars Gr, which grooves ex tend the whole length of said bars. The projections serve to guide the ascent and descent of the followers see Fig. 3.

Upon the under side of the follower A3 there is arranged longitudinally a rotating shaft D, which is supported in a frame or, that is cast upon the follower A3 and projects down from the bottom thereof. The shaft D, has its bearings in this frame a. Each extremity of the shaft D, is provided with a pinion E, which engage with the racks F, upon the bars G. j In the center of shaft D, there is a worm wheel or pin* ion L, with which a screw C, engages said screw being cut upon the extremity of a shaft M, which is arranged at right angles to the shaft D. Shaft M, extends from the side of follower A3 through an aperture therein to shaft D, as shown, the bearings of shaft M, being in the follower A3 and in the box a. The outer extremity of shaft M, is provided with a crank B, by which rotary motion is given to the shaft M, which imparts a similar movement to shaft D, causing the pinions E, to travel up or down upon the racks F, according to the motion given to shaft D, and thus to elevate and depress the follower A3 at the will of the operator.

In bookbinding presses as commonly made it is necessary in order to bring the load of paper to be pressed up to or nearly up to the screw of the upper follower I, to place a stack of boards upon the base or bottom which boards serve as a filling, for it is found disadvantageous to use a very long compressing screw owing to its liability to spring or break when its length exceeds a certain measure unless it is made excessively 'heavy and expensive. The use of the boards as a filling is attended with much labor inconvenience and loss of time in their adjustment and they likewise by their elasticity prevent the rigid compression of the sheets which is so necessary in order to remove the indentations of the types upon printed sheets.

By the use of my improvement all filling boards are dispensed with and I am enabled to adjust the load to be pressed to the upper follower in the most expeditious manner.

The following is the operation of my improvement. The load of sheets is placed upon the lower bed or follower and the crank B, is then turned so as to convey up the load against the bottom of follower A3.

The screw I, `is now rotated so as to cornpress the sheets and after remaining thus compressed for a suitable time 'additional compressing force is applied to lever J. When the pressure has been continued sufficiently long the crank B, is rotated so as to lower the load and the sheets are removed.

My improvement thus greatly facilitates the operation of pressing the sheets and also enables the work to be done in a better manner, because the sheets are pressed between two rigid surfaces, and the base upon which they rest is not elastic as it is when filling boards are used.

rIhe expense of my attachment is not greater than the cost of the filling boards, so that by my improvement I am enabled to produce a much superior working press without any augmentation of expense.

The side bars G, also serve to guide and steady the followers and also give much additional strength and firmness to the press.

.I do not claim broadly the invention of presses having two followers, but

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The arrangement of the guide rack bars G, pinions E, E, shaft D, worm wheel L, screw C, and shaft M, with the followers A3, I, and top and bottom plates A, A, as herein shown and described whereby the press is strengthened the followers guided, and the lower follower quickly adjusted all as set forth.

MALTBY K. PELLETREAU.

Viitnesses WM. TUsoH, M. vM. LIVINGSTON.

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