US479579A

US479579A - Printing-press

Info

Publication number: US479579A
Authority: US
Publication date: 1892-07-26
Anticipated expiration: 1909-07-26

Description

- (No Model.) 2 Sheets-Sheet 1.

A. W. VAUGHN. PRINTING PRESS.

Patented July 26, 1892.

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A. W. VAUGHN.

PRINTING PRESS.

No. 479,579. Patented July 26, 1892.

' .1 Wm m XVWQW @4/ P M W UNITED STATES PAT NT OFFICE.

AUGUSTUS V. VAUGHN, OF STUART, IOWA.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 479,579, dated July 26, 1892.

Application filed July 23, 1891- Serial No. 400,519. (No model.) V

To all whom it may concern.-

Be it known that I, AUGUSTUS W. VAUGHN, a citizen of the United States of America, residing at Stuart, in the county of Guthrie and State of Iowa, have invented an Improved Printing-Press, of which the following is a specification.

My improvement relates to that class of printing-presses for which Letters Patent were issued to me June 9, 1891, No. 453,988, and has for its object the provision of means for regulating the impression on the sheet to be printed and means for preventing the tympan from pressing a sheet down before it is subjected to pressure by the roller, as required, to prevent blurring a sheet on the form before an impression is made by the action of the roller.

My invention consists, primarily, in horizontallymovable frames operating on the sides of a press and having vertically-movable blocks therein and bearings in the blocks to admit a roller, set-screws on the tops of the frames adapted to engage yielding means interposed between it and the said blocks, as required, to regulate the impression on the sheet to be printed, and the flexible tympan, arranged and combined as hereinafter set forth,pointed out in myclaims, and illustrated in the accompanying drawings.

Figure l is a longitudinal sectional view of my press, showing the roller-supporting track provided with lugs that project in through openings in the frame to be engaged by setscrews located on the inside of the frame for adjusting the track. Fig. 2 is a perspective view of the complete press, showing the tympan folded down upon the bed. Fig. 3 is a sectional detail view-of one end of the roller, showing the adjusting device thereon, the track on which the roller moves, fixed to the frame by means of a bolt, part of a form of type on the bed, and other devices.

A represents the supporting-frame of the device, preferably made of cast metal and having at its top a solid metal bed B, firmly fixed thereto.

0 represents a track upon which the roller operates on the side of the bed B, and is adjustably connected therewith by means of bars C, fixed to the track and bifurcated at their freeends and extended inward through openings in the frame, screw-eyes O fixed to the frame, and screw-bolts O having shoulders to engage the bifurcated parts of the bars 0, as shown in Fig. 3.

D represents a cylindrical roller extending across the bed B, operating on the tracks 0 and having bearings in the frame F, hereinafter described. An annular groove D extends around its periphery at each of its end portions, adapted to admit the side portions of the tympan.

' F represents the supporting-frameof the roller. The upper portion thereof is rectangular in shape and is adapted to admit ablock F which forms a bearing for the roller D to move vertically therein, and its top portion is provided with a set-screw adapted to engage a yielding block of rubber, which is interposed between the set-screw and block F as required, to regulate the pressure of the roller on the type. A downward laterallyprojecting portion F from the frame F is provided with bearings for the guide-wheel F which engages a V- shaped projection formed on the under side of the track 0 and prevents a vertical movement of the roller D.

H represents a connecting-bar fixed to the frame F and having the two ends of a belt H attached to its end portions. The said belt H extends over the belt-wheel H at one end of the bed B and the crank-wheel J at the opposite end thereof, and the said crank-wheel when rotated will operate the cylindrical roller D.

The tympan designated by the letter K in the accompanying drawings differs from those now in common use in having its parallel side portions made of curved elastic metal strips pivotally connected with the track 0. It will be obvious to those familiar witlrthis class of mechanism that the curved form of the tympan will prevent it from pressing paper on'a form before the roller passes over it and that it will spring up again after the roller has passed over it,and thereby prevent the printed sheet from blurring. The tympan-frame thus formed is designed to be covered with cloth or a blanket in a common way and operated by hand. A frame (shown at the end of Fig. 2) is adapted to support the tympan while a sheet of paper is placed loosely thereon to befolded down upon the type-form by means of the tympan in a common way.

In the practical operation of my invention I place the roller in front of the free end of the tympan, lift the tympan and allow it to rest against its support, place a form on the bed, attach a blank sheet of paper to the tympan and turn it down on the bed, and then by means of the crank-wheel and belt advance the roller over the tympan and allow it to rest on the frame beyond the pivoted end of the tympan until the tympan is again lifted, the printed sheet removed, and ablank sheet attached and folded down on the bed with the tympan and the roller moved in a reverse direction and over the free end of the tympan again. A sheet is thus printed each time the roller is thus advanced over the tympan and form on the bed, as required, to print sheets successively and rapidly. The impressions are readily regulated by means of the set-screws at the tops of the frame F.

Having th us described my invention, What I claim as new, and desire to secure by Letters Patent, is-

1. In combination with the bed of a printing-press, a tympan-frame having its parallel side portions formed of curved elastic mate rial and the lower end of the tympan pivotally connected with a part of the press, to operate in the manner setforth, for the purposes stated.

2. In a printing-press, in combination with a bed and a supporting-frame, tracks adjustably connected with the sides of the frame, a cylinder carried in bearings fixed. to said tracks, means for securing an adjustable pressure between the cylinder and the bed, means for reciprocating the cylinder over the bed, and a tympan frame having elastic curved sides pivotally connected with the said tracks, for the purposes stated.

3. A hand printing-press consisting of a supporting frame A, a bed B, adjustable tracks 0, a roller D, frames F, the adjustable blocks F portions F projecting from the frames, having the guide-wheels F journal'ed therein, a connecting-bar H, a belt H ,ab'eItwheel H and a crank-wheel J, adapted to admit the belt, and the tympan K, constructed and combined, substantially as described, to operate in the manner set forth, for the purposes stated.

AUGUSTUS WV. VAUGHN. Witnesses:

F. G. W001), THOMAS G. ORWIG.