Mechanism for incremental movement of vertical frame

Details Mechanism for incremental movement of vertical frame Mechanism for incremental movement of vertical frame

1974-09-05

1976-08-17

Camby, John J.

Heating

Processes of heating or heater operation

Including preparing or arranging work for heating

219162, 228242, 432 11, F27D 500, F27D 1300

Patent

active

039751430

ABSTRACT:
Apparatus for incrementally moving a planar frame, such as a die support frame used in the manufacture of semiconductor components. The apparatus includes means for mounting a frame for movement in a vertical plane past a heater element, whereby portions of the frame can be successively heated by the heater element to permit bonding of die to leads terminating at the upper margin of the frame. The frame is incrementally moved by one or more horizontally reciprocal pawls, each pawl being receivable within an opening in the frame during a feed stroke of the pawl and being cammed out of such opening during a return stroke thereof. A first clamp releasably clamps the frame to the heater element during a die bonding operation and moves away from the heater element at the end of the return stroke and during the feed stroke. One or more drag clamps releasably clamp the lower margin of the frame against a support during the return stroke and through a major portion of the feed stroke, the drag clamps moving away from the support during the latter part of the feed stroke to permit the frame to gravitate if it has elevated during the feed stroke.

REFERENCES:
patent: 1673226 (1968-06-01), Bushell et al.
patent: 2583968 (1952-01-01), Rosseau

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