Sheet end cutter and stripper
AssigneeS&S Corrugated Paper Machinery Co., Inc.
InventorsDavid Adams, Ralmond J. Smiltneck
Life of this patent
Estimating the term…
Abstract
Sheets of paperboard or the like are gripped along one end by a plurality of grippers and are drawn by the grippers along a predetermined path for processing. An array of stripper tools mounted at the end of the path strips the body of the sheet free from a waste strip which remains gripped by the grippers. The waste strip is carried away from the stripper tools by the grippers and is subsequently released at another station. The stripper blades are driven by a reciprocating drive mechanism which includes a reciprocating slide, a spring urging the slide in one direction, a rotating arcuate cam flange which periodically blocks movement of the slide and periodically frees it for movement, and another rotating cam which reciprocates the slide through one cycle each time it is free to move.
Claims16
In a machine for processing sheet material and including at least one gripper for gripping a partially severed waste edge strip of a piece of sheet material, and means for moving said gripper along a predetermined path to draw the gripped sheet therealong for processing, the improvement comprising a stripping tool mounted at a first work station adjacent to said predetermined path and positioned to strip the body of said sheet material from the waste edge thereof, means for actuating said stripping tool to completely sever said body from said strip, and means at a second work station adjacent to said path for opening said gripper to release said waste edge strip, a stripper element mounted adjacent to said path at said second work station, said stripper element being movable into contact with said waste edge strip to dislodge the waste edge strip from the gripper when the latter is opened, and means for moving said stripper element into contact with said waste edge strip when said gripper is opened.
In a machine for processing sheet material and including at least one gripper for gripping a partially severed waste edge strip of a piece of sheet material, and means for moving said gripper along a predetermined path to draw the gripped sheet therealong for processing, the improvement comprising a stripping tool mounted at a first work station adjacent to said predetermined path and positioned to strip the body of said sheet material from the waste edge thereof, means for actuating said stripping tool to completely sever said body from said strip, and means at a second work station adjacent to said path for opening said gripper to release said waste edge strip, said stripping tool including at least one blade assembly movably mounted on the machine for movement between a stripping position and a retracted position, and further comprising a reciprocating drive means for reciprocating said blade assembly between said stripping position and retracted position, said reciprocating drive means comprising spring means urging said blade assembly toward one of its two positions, a first cam mechanism periodically blocking movement of said blade assembly and periodically freeing said blade assembly for movement, a second cam mechanism periodically driving said blade assembly through a stripping stroke and return stroke during the time period when it is free for movement, said first cam mechanism including a cam disk having an arcuate cam flange projecting from a portion of the periphery thereof, means rotatably mounting said cam disk on said machine adjacent to a portion of said blade assembly, a cam roller mounted on a portion of said blade assembly in position to engage said arcuate cam flange to periodically prevent movement of said blade assembly and periodically free it for movement, and wherein said second cam mechanism includes a second cam disk having a cam roller thereon, means rotatably mounting said second cam disk on said machine adjacent to a portion of said blade assembly, a cam follower mounted on a portion of said blade assembly adjacent to said cam roller in position to engage said roller, means for rotating said first cam disk at a predetermined speed, and means for rotating said second cam disk at a speed which is an integral multiple of said predetermined speed for said first cam disk.
In a machine for processing sheet material and including at least one gripper for gripping a partially severed waste edge strip of a piece of sheet material, and means for moving said gripper along a predetermined path to draw the gripped sheet therealong for processing, the improvement comprising a stripping tool mounted at a first work station adjacent to said predetermined path and positioned to strip the body of said sheet material from the waste edge thereof, means for actuating said stripping tool to completely sever said body from said path for opening said gripper to release said waste edge strip, said stripping tool including an anvil blade mounted at one side of said path and a stripping blade mounted at the other side of said path, said means for actuating said stripping tool comprising means for concurrently moving said blades toward said path to substantially concurrently engage one said blade with the waste edge strip and the other said blade with the body of the sheet material.
Dependencies are inferred from the claim text.