Pitch changing device for changing pitches of plate-like objects

Details Pitch changing device for changing pitches of plate-like objects Pitch changing device for changing pitches of plate-like objects

1989-04-24

1991-04-16

Bucci, David A.

Material or article handling

Device for emptying portable receptacle

With jarring means

294 871, 2941191, 414404, 414750, B65G 6500

Patent

active

050077880

ABSTRACT:
A pitch changing device of the present invention includes a lift mechanism for unloading a plurality of wafers arranged in a cassette at predetermined pitches from the cassette while the pitches are kept unchanged, and a chuck mechanism for holding the unloaded wafers while the pitches are kept unchanged. The chuck mechanism includes moving pieces mounted to be movable in an arrangement direction of the wafers, for respectively supporting the wafers, elastic members mounted in the movable pieces to be expandible/contractible in the arrangement direction of the wafers, and a driving mechanism for expanding/contracting the elastic members. When the elastic members expand/contract by the driving mechanism, the pitches of the wafers are changed while the wafers are held. The lift mechanism includes a handler for variably moving wafer stands in the arrangement direction of the wafers, and changes the pitches while the wafers are lifted.

REFERENCES:
patent: 2856089 (1958-10-01), Lennon
patent: 2921702 (1960-01-01), Gross
patent: 3260379 (1966-07-01), Bason
patent: 3302967 (1967-02-01), Harris et al.
patent: 3542224 (1970-11-01), Warren
patent: 4120526 (1978-10-01), Rohner
patent: 4466766 (1984-08-01), Geren et al.
patent: 4611966 (1986-09-01), Johnson
patent: 4832180 (1989-05-01), Ferrero

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