초록 ▼

Apparatus for measuring the forces applied to a pull tab during the formation of an opening in a container lid having an upper and lower surface with a pull tab hingedly secured on the upper surface and a score line in the container lid defining an opening and wherein one container lid at a time is

Apparatus for measuring the forces applied to a pull tab during the formation of an opening in a container lid having an upper and lower surface with a pull tab hingedly secured on the upper surface and a score line in the container lid defining an opening and wherein one container lid at a time is fed into a holder having an opening therein so that a substantial portion of the upper surface of the container lid and all of the pull tab are exposed. A rotatable pull tab positioning head having a generally planar surface in which a recess in the shape of pull tab is formed is moved into resilient contact with the pull tab and is rotated relative to the container lid until the pull tab moves into the recess and thereafter the container lid and pull tab rotate with the positioning head to position the pull tab at a predetermined location. A load cell assembly having a pivotal hook member is moved into position with the hook member between the upper surface of the container lid and the pull tab. The container lid is rotated about the axis of the hinge connection of the pull tab and the hook member is held at a fixed position. As the container lid rotates, the hook member applies resistant forces on the pull tab until the opening is formed in the container lid which resistant forces are measured by the load cell assembly. The opened container lid is then discharged from the holder.

대표청구항 ▼

Apparatus for measuring the force applied to a pull tab to form an opening in a container lid comprising: a feed chute for holding a supply of container lids, each of which has an upper surface, a lower surface, a peripheral rim portion, a severable tab portion and a pull tab secured to said contain

Apparatus for measuring the force applied to a pull tab to form an opening in a container lid comprising: a feed chute for holding a supply of container lids, each of which has an upper surface, a lower surface, a peripheral rim portion, a severable tab portion and a pull tab secured to said container lid and extending over a part of said upper surface which pull tab is adapted to be grasped so as to apply a force thereto acting against said severable tab portion to form an opening in said container lid; holding means for holding one of said container lids while operations are performed thereon; said holding means having at least one opening formed therein so that a substantial portion of said upper surface and all of said pull tab are exposed; feed means for separating one of said container lids from said supply thereof and feeding said one of said container lids to said holding means; stop means for cooperating with said holding means for positioning said one container lid so that said substantial portion of said upper surface and said pull tab are exposed through said at least one opening; orienting means for contacting said pull tab and said upper surface to position said pull tab at a predetermined location in said holding means; force measuring means having a portion thereof in contact with said pull tab for measuring the forces generated on said pull tab during the formation of said opening in said container lid; force applying means for causing relative movement between said container lid and said pull tab to apply a force to said severable tab portion to form said opening in said container lid; recording means for recording the forces applied to the pull tab during the formation of the opening in said container lid; and discharge means for discharging said opened container lid to a hopper.