US224132A - Albert h - Google Patents

Description

UNITED STATES ALRERT H. BOGART, oF NEW PATENT OFFICE.

YORK, N. Y., ASSIGNOR TO TIFFANY 8u CO., OF

SAME'PLA'CE.

lPLA-rla-PRINTING MACHINE.'

SPECIFICATION fOI'mIlg part `0f Letters Patent N0. 224,1'32, dated. :February 3, 1880.

' i .Application led November 111, 1879. i 1 i VTo all (whom it may concern Beit known that I, ALBERT H. BOGART, of New York, in the county and State of New York, have invented a new and useful Im-`r provement in Printing-Presses for Printing from Engraved Plates, of which the following is a specification.

This invention relates to an improved mechanism for moving the table holding the engrayed plate. Y

a a are the standards composing the sid frame of the press. b is the-table on which is placed the mechanism for holding the engraved plate. c is the pressure-rolleriwhich gives pressure to the card-board or Inaterial placed on the engraved plate for thedesired impression. Y

Previous to my invention the pressureroller contained a lug, and in the revolution of such roller this Jug came into contact with another lug placedon the side of the table,

. and thus the table was drawn underneath the roller. This imparted a vibratory or jarring motion to the table which frequently marred theV impression. Av slow' movement of the 'table through the machine was necessary to gun-spring, f, placed underneath it, 011e end of such spring resting in the lower portion of the frame e. This lever contains a groove, g,

:along its upper portion, so that the cam h ou Vthe side of the pressure-roller c may move during its revolution therein, and hence draw` both table and lever along by frictionalcontact until the table reaches the position at which the impression is made by the surface of the roller c. Then the cam-roller t", projecting farther out than the cam h, presses on the top of the sides of this groove g and' presses still farther down the lever d. This causes the lever to become locked underneath the shoulder of the latch or trigger j, placed in the side of the framev e', and as the roller c moves away from over the engraved plate the side lever d, being freed from contact ,withthe cam, permits the table b to run back into its original position, where it is ready to receivev another card or other material onto the engraved plate. n

` gravity-weight and cord k.

A small notch is made on the under side of the lever at l, in order that the spring m on the side of the machine -frame may take into it as soon as the table has run back intojposition again, and thus arrest any tendency ot' the table-to vibrate at the end of its move- '.ment.

After the table has returned to its original position the latch j is pulled by the hand in adirection away from thetable and against its retaining-springj, which operation will release the lever, the gun-spring `throwing the lever vinran upward direction, and at same time th'espring m will release itself from the notch l. This brings `the lever in a position to belacted upon by the cam h of the pressureroller c as Vsoon as another card has been placed in position on the table.

Thus it is seen the table is pulled through by frictional` contact, and can therefore be run at a greater speed than when it is. operated by the old mechanism of lugs, as described, there being no jarring or uneven movements .consequent upon such increase of speed. A The running capacity of the press is so much increased t-hat steam-power may be profitably employed with it.

l. The combination of the table with the lever arranged at the side of such table and the cam and cam-roller attached to the pressureroller operating the lever and `the said table, substantially as described. Y

2. The combination of the table with the lever and the latch for locking and` releasing said lever, arranged at side of the table, substantially as described. e

3. The `notched lever arranged at the side of the table,` in'combination with a spring attached to the frame of the press, so as to arrest the vibratory movement of the table, substantially as described.

4ALBERT H. BOGARTI Witnesses:

JAMES H. HUNTER, WILLIAM H. LEWIS.

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