Pick up and placement head for green sheet and spacer

Details Pick up and placement head for green sheet and spacer Pick up and placement head for green sheet and spacer

1977-12-12

1980-01-29

Cherry, Johnny D.

Sheet feeding or delivering

Feeding

Separators

271259, 294 64R, B65H 308, B65H 702

Patent

active

041858140

ABSTRACT:
A vacuum pick up and transfer head adapted for handling flimsy sheets of material such as spacer sheet and uncured ceramic sheet commonly referred to as green sheet. The vacuum transfer head is of generally rectangular configuration having a sheet contacting lip having vacuum slots formed through the periphery thereof to hold the sheets in place by vacuum pressure. The center of the sheet contacting face is recessed whereby, with a sheet in place and acting as a diaphragm, a central vacuum chamber is also defined. A series of check valves are provided to control application of vacuum and positive pressure to the green sheet for picking the sheet up, retaining it and stripping it. A plurality of probes are provided in the handling head, adapted to selectively project through the sheet contacting surface for detecting green sheet and/or spacer sheet utilized inbetween layers of green sheet. These probes also can act as positive strippers when the head enters a green sheet spacer tray in the process of removing a sheet of spacer or green sheet.

REFERENCES:
patent: 715905 (1902-12-01), Tuck et al.
patent: 2776163 (1957-01-01), Cremer
patent: 3180608 (1965-04-01), Fischer
patent: 3523707 (1970-08-01), Roth
patent: 3694894 (1972-10-01), Jelinek et al.

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