US18589A - Richd - Google Patents

Description

UNITED STATES PATENT OFFICE.

RIOHD. M. HOE, OF NEVV YORK, N. Y.

FEEDING PAPER TO Specification of Letters Patent No.

To all whom it may concern:

Be it known that I, RICHARD M. HOE, of the city, county, and State of New York, have invented a new and useful Improvement in Devices for Feeding Paper to Printing-Presses and Analogous Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a side sectional elevation of my improvement applied to a cylinder printing press. Fig. 2 is a plan or top view of the same.

Similar letters of reference indicate corresponding parts in both figures.

This invention relates to an improvement in that class of paper-feeding devices in which the sheets of paper are fed to the machine through the agency or medium of what is termed a drop roller.

In this class of paper-feeding devices, the drop roller is brought intermittently in contact with the feeding or impression cylinder, and at the proper time passes or feeds the sheets between the two series of tapes by which they are carried to the machine.

The drop roller as hitherto employed` has not had a positive motion communicated to it, but has depended solely (after the machine has been started) upon its brief contact with the feeding or impression cylinder for rotation, consequently its operation has not been perfect; for when detached from the 'feeding cylinder its motion decreases and the roller, when brought in contact with the sheets, rather serving, in consequence of its slow speed compared with the feeding or impression cylinder, to retard the sheet in an increased ratio to the varying speed of the machine, thereby causing an imperfect register.

The invention consists in obviating the above ditliculty by giving the drop roller a positive or practically positive motion, as hereinafter described so that it will rotate at all times with a speed corresponding to that of t-he other working parts of the device and those parts of the machine to which it is applied.

The invention is mainly applicable to the cylinder printing press, but may be advantageously applied in all cases in which such feeding devices are employed.

To enable those skilled in the art to fully PRINTING-PRESSES.

18,589, dated November 10, 1857.

understand and construct my invention, I will proceed to describe it.

A represents the type cylinder of a cylinder printing press.

B is an impression cylinder, placed in contact with the type cylinder; and D is a feeding cylinder placed at the inner end of a feed board M.

I represents a series of belts or tapes which pass around the feeding cylinder D, and around another cylinder D1, placed below the impression cylinder B.

K represents a series of belts or tapes which pass around a cylinder K1, just above the feeding cylinder D, and around a cylinder I by the side of cylinder D1.

O, is a roller which is placed just above the cylinder K1; the roller O being rotated by the belts or tapes K, against which it bears.

F is the drop roller, the journals (a) of which are fitted in the inner ends of arms (o) (b) which are attached to a rock-shaft P, which is fitted in the framing Q, directly below the feed board M. This shaft P has an arm (o) att-ached to it; said arm being connected to a spring (cl) the lower end of which bears against a cross-tie (c) of the framing. One end of the shaft P has an arm (f) attached to it; and the lower end of a rod R is connected to: the end of said arm; the said rod being slot-ted and having a guide pin (g) passing through it; the pin (g) being attached to t-he framing. The upper end of the rod R has a friction roller (It) att-ached to it; and a cam on one end of the shaft of cylinder A, bears against said roller.

`When the prominent port-ion of the cam (2'.) is not in contact with the roller (7L), the spring (d) will keep the roller F elevated and in contact with roller O, which is rotated, as previously stated, by the tapes K; and when the prominent portion of the cam acts against the roller (it) and actuates the rod R, the rock-shaft P will be turned and roller F brought down in contact with the feeding cylinder or rather with the edge of the sheet, which is placed over. said cylinder by the attendant, and the sheet fed or passed by the roller F and cylinder D between the two series of belts -or tapes I,

K, by which it is carried between the impression and type cylinders.

It will be seen, therefore, that the drop roller is rotated when in an elevated state,

and detached from the cylinder D by the roller O, so that its speed is constant or regular or nearly so, and when it is brought down so as to act upon the sheet on the feeding cylinder D, the motion of its surface or periphery will correspond or be equal to that of the cylinder D, thereby obviating the diiiiculty attending an irregular motion, as presently referred to. It will be understood that as soon as the roller F is depressed, and the sheet fed or passed between the belts K, I, the roller immediately ascends; the prominent portion of the cam having then passed the roller (It) so that the spring may turn the shaft P suiliciently to throw up the roller, and the roller F remains upward until the sheet has entirely passed between the tapes, and the edge of the succeeding sheet placed over the feeding cylinder D. Consequently, in the old plan, as the drop roller F, while in an elevated state depends solely for rotation upon its momentum; only given to it, of course, by its Contact, when depressed, with the cylinder D, it follows as a matter of course that the speed of the surface of said roller will be very much less than the cylinder D, when brought down in contact with it. Whereas, in my improvement, the only time when said roller F is not in contact with either the roller O, or cylinder D, is when it is passing from one to the other; this being almost instantaneous, the speed of said roller may be said to be constant, as there is not practically any appreciable variation in its speed. It will be understood, of course, that one or more feeding devices may be applied to one type cylinder.

I do not confine myself to any particular means for operating or elevating and depressing the roller F, for various devices may be employed for such purpose, and all answer equally well.

I do not claimV feeding sheets of paper to print-ing presses and analogous machines by means of a feeding cylinder in connection with a series of endless belts or tapes and a drop roller, for such device is Well known and in common use. But

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

Giving the drop roller F, a constant or regular speed corresponding at all times to that of the other running or working parts of the device by bringing said roller F, when in an elevated position and detached from the cylinder D, in contact with the impelling roller O, actuated by the belts or tapes K, ubsltantially as and for the purpose set ort i.

BICI-ID. M. HOE.

Witnesses T. J. SHEPHERD,

O. D. Munn.V

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