Work holders – Relatively movable jaws – Means to actuate jaw
Patent
1975-12-08
1976-12-28
Griffin, Donald A.
Work holders
Relatively movable jaws
Means to actuate jaw
24255BS, 269289R, A41B 2100
Patent
active
039992616
ABSTRACT:
A pad-type jar gripper with a circular depression in the center for holding the base of a conventional canning jar securely during hot-jar processing, the gripper automatically adjusting for tighter holding when a jar is pressed downward in the pad depression and readily releasing the jar when it is lifted from the pad.
As illustrated in the drawings and described in more detail hereinafter, the particular embodiment of this invention comprises a base pad having firm but pliable stubby gripper fingers angled upward from the outer edge of the pad. These fingers are so arranged around the circumference of a circular depression in the pad as to accept the bottom section of a conventional canning jar. The fingers extend up the jar sides sufficiently to prevent the jar from being easily tipped. The bottom part of the pad has a soft center directly beneath the bed of the jar-holding depression. The shape of the pad where the soft material is impressed plus the give of the soft material allows weight or downward pressure applied on the held jar to angle the gripper fingers inward. This activates the gripper fingers causing them to close tightly around the base of the jar. The jar then is gripped securely from below while the jar lid is being tightened with a downward pressure being applied from above. This downward pressure also activates suction indentations underneath the pad to prevent the pad from slipping. This gripper device is also self-adjusting to easily release a jar when weight or pressure is reduced as the jar is lifted from the gripper fingers.
REFERENCES:
patent: 2051068 (1936-08-01), Ayre et al.
patent: 2264489 (1941-12-01), Tiegler et al.
patent: 2956687 (1960-10-01), Robichaud
patent: 2963256 (1960-12-01), Borah
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