US852530A - Paper-sheet-feeding mechanism for printing-presses. - Google Patents

Description

PATBNTBD MAY 7, 1907.

J. E. TUCKER. PAPER SHEET FEEDING MECHANISM FOR PRINTING PRBSSBS.

APPLICATION FILED DEG-14. 1905.

[NV/5N TOR a Artarney UNITED STATES PATEN orrron.

JUN IUS EDGAR TUCKER, OF MEMPHIS, TENNESSEE, ASSIGNOR 0F ONE-HALF TO WILLIAM S. BRIAN, OF MEMPHIS, TENNESSEE.

Specification of Letters Patent.

Patented May '7. 1907.

Application filed December 14, 1905. Serial No. 291,746.

To all whom it may concern:

Beit known that I, J UNIUS EDGAR TUCKER, a resident of Memphis, in the county of Shelby and State of Tennessee, have invented certain new and useful Improvements in Paper-Sheet-Feeding Mechanism for Printing-Presses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improved paper sheet feeding mechanism for printing presses, the object of the invention being to provide improved mechanism for holding a sheet of paper stationary and in proper position on the platen to receive thetype and preventing reverse movement of the paper should the machine be run in the wrong direction, and the invention consists in certainnovel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out inthe claims.

In the accompanying drawings, Figure 1 is a fragmentary view in side elevation illustrating my improvements, and Figs. 2, 3, and 4 are views of details of construction.

1 represents a stationary platen and 2 a movable bed. plate.

3 and 4 are wheels or rollers, over which the .paper carrying tapes 5 pass and move over platen .1 to convey sheets of paper thereto and therefrom.

Below the platen 1 is a slotted crossbar 6 to which metal clamping strips 7 are adjustably secured and located adjacent to the tapes 5. The upper ends of these strips 7 are flared outward so as to be engaged by the bed plate before the type reaches the paper on the platen, and hold the paper against the platen until the bed plate has moved away from the samefar enough to prevent any possibility of smearing.

Above the lower tapes 5, between the rollers and platen, a bar 8 is located and made with a flat lower face, and a similar bar 9 is located below the tapes and carried by hinged arms 10. These hinged arms 10 are connected by links 11 with the outer ends of levers 12 pivoted between their ends, and the inner ends of said levers are provided with rollers 13 to run against cams 14 on the shaft of the upper wheels or rollers 3, and this end pin stops 16 to limit the turning movement of the cams in one direction. These cams 15 engage wheels 17 on the shafts carrying earns 14, and owing to their shape are not turned by the wheels 17 when the machine is running properly, but should the machine be run in the wrong direction, the cams 15 will roll on wheels 17, which will rock levers 12 and pull lower bar 9 upward tightly clamping the tapes between bars 8 and 9 and instantly stopping any backward feed of the sheets of paper, the wheels over which said tapes pass, meanwhile slipping on the tapes. When the machine moves in the correct direction, the cams 15 will be returned to their former positions and maintained in such position by springs 18, such return movement being limited by the stops 16.

The ordinary operation is as follows :At the proper time, when a sheet is in correct position on the platen, the cam wheels 14 will depress wheels 13 and clamp the tapes between the bars 8 and 9 to hold said tapes and the paper stationary during the printing operation, the time of such clamping action being governed by the shape-of cams 14, as will be readily understood. While the tapes are clamped, the wheels over which they pass will slip on them.

A. great many slight changes might be made in the general form and arrangement of the parts described without departing from my invention, and hence, I do not restrict myself to the precise details set forth but consider myself at liberty tomake such slight changes and alterations as fairly fall Within the spirit and scope of my invention.

Having fully described my invention, what I claim as new and desire to secure by Letters- Patent is 1} Feeding means for printing presses, comprising feeding tapes, operating means for said tapes, and means operated by said ofperating means for stopping the tapes when t e operating meansrun'in the wrong direction.

2. Feeding mechanism for printing presses comprising feeding tapes, driving means for said tapes, stop mechanism operated by said driving means for arresting the movement of a sheet being fed, during the printing operation, and means cooperating with said stop mechanism and driving means for sto ping the movement of the tapes should tffe of the levers also carry cams 15 there being driving means run in the wrong direction.

7 tion on the platen, automatic means for operating the clamp at the proper times and means operating the clamp whe'nthe ma chine is run in the wrong direction.

4. In'an apparatus of the character de scribed,'the combination with a platen, tapes for feeding sheets of paper thereto, and means for stopping the movement of the tapes when a sheet is in proper position on v the platen, of adjustable spring clamps above the tapes on the platen having outwardly flared upper ends, and a movable bed late to engage the spring clamps and hol the sheet while being printed upon and after printing to prevent blurringof the ink.

the wrong direction.

5. In an apparatus of the character described, /the combination with tapes for feeding sheets of paper to the platen, of a fixed clamping bar at one side of the tapes,"a movable clamping bar at the opposite sides of the tapes, a pivoted lever to-operate said movable bar, a wheel and a cam on the lever, an

o erating cam to operate thewheel during t e: correct running of the machine, and a wheel to operate the cam on the lever and stop the tapes should the machine be run in In testimony whereof, I have signed this 1 specification in the presence of two subscribmg witnesses.

JUNIUs 'EDGA/R TUCKER.

Witnesses:

WILLIAM .V. HUnsoN, ALBERT A. MALsY.

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