Sheet feeding or delivering – Feeding – With means to align sheet
Patent
1975-04-18
1976-11-23
Blunk, Evon C.
Sheet feeding or delivering
Feeding
With means to align sheet
74 82, 271254, 271255, 271272, B65H 906, B65H 506
Patent
active
039933024
ABSTRACT:
Sheets are fed down an inclined feedboard to a transfer cylinder of a printing press. Adjacent the delivery end of the feedboard there are a plurality of pairs of feed rolls to accelerate the sheets toward the transfer cylinder and a plurality of front guide members to preregister the front edge of the sheet. The pairs of feed rolls each include a driven roll that oscillates through an arc in timed relation with the transfer cylinder. The feed roll drive mechanism includes pairs of flexible members wrapped in opposite directions around and secured to the feed roll drive shaft on which the driven feed rolls are mounted. In one embodiment one of the flexible members is connected to a lever mechanism and the other flexible member is connected to the press housing through a spring member. In another embodiment both flexible members are connected to the lever member with a spring member on the lever member maintaining a tension on both flexible members. The lever member is pivotally connected at one end to the press frame or bearing housing of the transfer cylinder and has a cam follower roller between the pivot connection and the flexible members. A cam member rotatable with the transfer cylinder pivots the lever in one direction to rotate the driven feed rolls through a preselected arc. A spring member urges the cam follower mounted on the lever against the cam member. The pivot connection for the lever includes an eccentric member that moves the pivot axis of the lever and changes the degree of buckling of the sheet against the front stop members on the transfer cylinder as the sheet is conveyed by the driven feed rolls.
REFERENCES:
patent: 562124 (1896-06-01), Doolittle
patent: 1159011 (1915-11-01), Garlick
patent: 2211765 (1940-08-01), Davidson
patent: 2708405 (1955-05-01), Gegenheimer
patent: 2810295 (1957-10-01), Voss
patent: 3561771 (1971-02-01), Koch
Blunk Evon C.
Miller Printing Machinery Co.
Price, Jr,. Stanley J.
Stoner Jr. Bruce H.
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