Lifting device for stripping and blanking operations
A deflectable lifting device can be mounted to a support form, work surface or other member of a material conveyance system. According to embodiments, the deflectable lifting device can have a base that mounts into the support, and a bendable arm arranged in the pathway of a material conveyance system, such as a paper stripping or paper blanking work station. When a sheet or web of material travels over the deflectable lifting device, the bendable arm can bend and deflect downwards, but still contact the sheet or web with a gently humped or arcuate portion, providing a small margin of elevation or lift to the sheet or web. The sheet or web can therefore be elevated above edges, holes, or other obstructions in the pathway that could jam or snag the delivery of the material. The deflectable lifting device can comprise an arcuate portion or head over which the sheet or web can slide in a bearing fashion.
1. A deflectable lifting device for lifting a sheet or web of material in a conveying system, comprising:
a base portion and a bendable arm portion, integral with one another and of 1-piece construction, wherein
the base portion comprising a leading edge, a trailing edge opposite the leading edge, a top surface, a bottom surface, and at least one groove configured to secure the deflectable lifting device in a corresponding slot in a retaining board, the groove extending in a direction from the top surface toward the bottom surface, the top surface lies along a first plane that is substantially perpendicular to a direction from the top surface to the bottom surface and the base portion has a thickness defined as the distance between the leading edge and the trailing edge, and
the bendable arm portion comprising an arm extending upwardly from the base portion above the first plane contiguously to a curved transition portion, and terminating in a lobular head which extends downwardly from the curved transition portion, wherein the arm having a width and a thickness each of which is less than the thickness of the base portion.
2. The lifting device of claim 1 , wherein the lifting device comprises a molded polymeric material.
3. The lifting device of claim 1 , wherein the lifting device comprises a molded acetal resin material.
4. The lifting device of claim 1 , wherein the bendable arm portion has a first portion that is curved in a first direction of curvature and a second portion that is curved in a second, opposite direction of curvature.
5. The lifting device of claim 1 , wherein the bendable arm portion is sigmoidally-shaped.
6. The lifting device of claim 1 , wherein the lobular head curves toward the trailing edge of the base portion.
7. The lifting device of claim 1 , wherein the at least one groove comprises at least one base slot extending from the top surface to the bottom surface, the at least one base slot creating flex in the base of the lifting device.
8. The lifting device of claim 1 , wherein the bendable arm portion extends from the trailing edge of the base portion.
9. A stripping station comprising a support frame and the lifting device of claim 1 disposed in the support frame.