High speed sheet feeding apparatus
AssigneeLyle Development, Inc.
InventorMichael Wendt
Life of this patent
Estimating the term…
Abstract
Sheet feed apparatus for intermittently advancing a sheet, such as a thermoplastic sheet including a frame, sheet engaging mechanism reciprocally mounted on the frame for intermittently advancing the sheet, mechanism for reciprocally moving the sheet engaging mechanism in a to-and-fro path of travel including a stationary shaft and a rotatable shaft concentric with the stationary shaft, a primary crank arm fixed to the moveable shaft for rotation therewith, a secondary crank arm rotatably mounted on the primary crank arm for rotation relative thereto, and mechanism coupling the primary crank arm and the secondary crank arm for rotatably driving the secondary crank arm in a direction opposite the direction of rotation of the primary crank arm.
Claims13
Sheet feed apparatus for intermittently feeding a continuous sheet, such as a plastic sheet to a work station of a machine, such as a trim press, comprising;
- a frame;
- sheet engaging means;
- means reciprocally mounting said sheet engaging means on said frame for movement in a forward and reverse path of travel to intermittently forwardly index said sheet as said sheet engaging means moves forwardly but permitting said sheet to remain stationary as said sheet engaging means moves rearwardly;
- and
- means for reciprocally driving said mounting means in said forward and reverse path of travel comprising;
- a first shaft mounted on said frame;
- a second shaft, concentric with said first shaft, rotatably mounted on said first shaft;
- means for rotatably driving said second shaft;
- a first sprocket wheel fixed to said shaft;
- a primary crank arm fixed to said second shaft for rotation therewith;
- a second crank arm mounted on said primary crank arm for orbital movement therewith and for rotating movement relative thereto;
- a second sprocket wheel fixed to said second crank arm;
- endless means trained around said first and second sprocket wheels for rotatably driving said second crank arm in a direction of rotation opposite the direction of rotation of said first crank arm;
- and drive arm means, journaled on said secondary crank arm and coupled to said mounting means, for reciprocally driving said sheet engaging means in said to-and-fro path of travel to intermittently forwardly index said sheet.
Sheet feed apparatus for intermittently advancing a web, such as a thermoplastic sheet, to a machine such as a trim press for performing an operation, such as trimming, to said sheet comprising:
- a frame;
- web engaging means;
- means mounting said web engaging means on said frame for reciprocal movement in a to-and-fro path of travel;
- means for driving said means mounting said web engaging means to a to-and-fro path including:
- first and second concentric coaxial shafts mounted on said frame;
- means mounting one of said shafts on said frame;
- means journalling the other of said shafts for rotation on said one shaft;
- means for rotatably driving said other shaft;
- primary crank arm means fixed to said other shaft for rotation therewith;
- secondary crank arm means mounted on said primary crank arm means for orbital movement therewith and for rotational movement about a second axis, relative thereto;
- means coupling said primary crank arm means and said secondary crank arm means for rotating said secondary crank arm means about said second axis at a rotational velocity which is twice the rotational velocity of said primary crank arm means about the first axis.
Dependencies are inferred from the claim text.