Sheet feeding or delivering – Feeding – Separators
Patent
1981-10-28
1983-12-06
Schacher, Richard A.
Sheet feeding or delivering
Feeding
Separators
271107, B65H 308
Patent
active
044189060
ABSTRACT:
A sheet stock transfer apparatus (10) is adapted to successively extract the lowermost sheet (22) of a stack thereof, while initially releasably confined within an elevated magazine (23) at a dispensing station, and to thereafter invert each such extracted sheet while being transferred to, and subsequently precisely positioned within, an underlying workholder (26) of an associated indexably advanced turret (27), for example, at a receiving station. This sequence of operations is accomplished through the use of both a specially constructed rack (11) and a pinion assembly (12). The rack is formed with an intermediate section with teeth and two opposite end sections without teeth. The pinion assembly includes a peripherally segmented and partially rotatable pinion (14), mounted on a hollow shaft (16), and being retractably driven along the rack in response to an indirectly coupled cam-controlled pneumatic cylinder (21), with a pick-up arm (18) fixedly secured at one end to the hollow shaft (16), and a sequentially operated vacuum cup (19) secured to the other (outer) end of the pick-up arm. As the pinion (14) is reciprocally driven along the rack (11), uniquely formed transition notches (11e, 11f) in the rack (11) and selective outer transition corners (14a', 14a" or 14b', 14b") formed in flat portions (14a or 14b) of the pinion (14) cooperate to sequentially effect linear-to compound linear and rotational-to linear displacement of the pinion, together with the pick-up arm (18) and vacuum cup (19). As thus constructed, the apparatus is particularly adapted to rapidly and reliably extract, transfer and position sheets that are very thin and/or of relatively fragile material.
REFERENCES:
patent: 270671 (1883-01-01), Huffer
patent: 2075169 (1937-03-01), Brown
patent: 2079080 (1937-05-01), Melind
patent: 3797822 (1974-03-01), Anderson
patent: 3937458 (1976-02-01), Langen
patent: 4322067 (1982-03-01), Masselin
Bergum K. R.
Miller R. P.
Schacher Richard A,.
Western Electric Company Inc.
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