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US 4,358,962 AGranted
Score line folding tester
AssigneeContainer Corporation of America
InventorsC. William Ashby, Stephen A. Morse
Life of this patent
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Abstract
An apparatus for measuring the force required to fold a paperboard about a score line comprises a force applying arm and a device for measuring a torque related to the force necessary to cause folding of the paperboard at the score line.
Claims3
An apparatus for measuring the force necessary for the folding of paperboard about a score line therein comprising:
- (a) a fixture for holding a paperboard test piece having a score line thereon;
- (b) said fixture having upper and lower spaced apart limbs defining a slot therebetween for entrance thereinto of a portion of said test piece;
- (c) the score line of said test piece lying along an axis coincident with an edge of said lower limb at the entrance to said slot;
- (d) a force applying arm pivoted to said upper limb and having force applying means supported thereby in contact with that portion of the test piece extending beyond said slot;
- (e) means for measuring a torque related to the force necessary to cause folding of the test piece at said score line;
- and
- (f) said measuring means being mounted upon a shaft fixed to said force applying arm and rotatable with respect to said upper spaced apart limb.
4 more elements
Dependencies are inferred from the claim text.