Apparatus for cutting sheet material
AssigneeMedical Specialties, Inc.
InventorHerman S. Johns
Life of this patent
Estimating the term…
Abstract
An apparatus for accurately and efficiently cutting a web of sheet material into individual cut segments, and which comprises a pivotal rocker arm, and means for periodically oscillating the rocker arm which includes an endless chain having one or more cams carried thereby. Each cam is positioned to operatively engage the rocker arm during its traverse of a portion of the trackway followed by the chain to thereby oscillate the rocker arm. The rocker arm is operatively connected to a pair of cutting knives so the knives oscillate therewith, and toggle means is provided for actuating the cutting knives during each forward oscillation thereof.
Claims26
An apparatus for accurately and efficiently cutting a continuous web of sheet material into individual cut segments of predetermined length and having provision for readily adjusting the length of the cut segments between wide limits, said apparatus comprising
- a frame,
- means carried by said frame for continuously feeding the web along a predetermined path of travel,
- knife means extending transversely across said path of travel for cutting the web of sheet material into individual cut segments,
- means for mounting said knife means on said frame such that said knife means may be periodically reciprocated forwardly and rearwardly to define a stroke which extends along a direction substantially parallel to said path of travel of the web of sheet material, said mounting means including a cam follower surface,
- means for periodically reciprocating said knife means along said stroke, and comprising an endless non-slip belt carried by said frame for translation about a predetermined trackway, means for continuously translating said belt about said trackway at a predetermined speed, and cam means carried by said belt for engaging said cam follower surface during a portion of the movement thereof along said trackway to thereby reciprocate said knife means along said stroke at a forward speed substantially corresponding to the speed at which the web is advanced by said feeding means, and
- means for actuating said knife means during each forward reciprocation thereof.
An apparatus for accurately and efficiently cutting a continuous web of sheet material into individual cut segments of predetermined length and having provision for readily adjusting the length of the cut segments between wide limits, said apparatus comprising
- a frame,
- means carried by said frame for continuously feeding the web along a predetermined path of travel,
- rocker arm means pivotally carried by said frame for pivotal movement about an axis extending transverse to and spaced from said path of travel, said rocker arm means including a cam follower surface,
- knife means carried by said rocker arm means and extending transversely across said path of travel for cutting the web of sheet material into individual cut segments,
- means for periodically oscillating said rocker arm means and knife means about said transverse axis, said oscillating means comprising
- a. an endless chain,
- b. means for mounting said chain on said frame for translation about a predetermined trackway having a forwardly directed segment extending in a direction corresponding to the direction in which the web of material is advanced by said feeding means,
- c. means for translating said chain about said trackway at a speed coordinated with the speed at which the web of material is advanced by said feeding means, d. at least one cam releasably carried by said chain, said cam being positioned to engage said cam follower surface upon movement of said cam along said forwardly directed segment of said trackway to thereby forwardly oscillate said rocker arm means and knife means at a speed substantially corresponding to the speed at which the web of material is advanced by said feeding means, and
- means for actuating said knife during each forward oscillation of said rocker arm means and knife means, whereby the length of the cut segments may be readily adjusted by changing the number of cams carried by said chain.
An apparatus for accurately and efficiently cutting a continuous web of sheet material into individual cut segments of predetermined length, said apparatus comprising
- a frame,
- means carried by said frame for continuously feeding the web of sheet material along a predetermined path of travel,
- knife means extending transversely across said path of travel for cutting web of sheet material into individual cut segments, said knife means comprising a first cutting blade positioned on one side of said path of travel, a second cutting blade positioned on the other side of said path of travel, and means for slideably mounting at least one of said blades with respect to the other blade such that the blades may be selectively closed to effect the cutting of the web and opened to permit the free passage of the web therethrough,
- means for mounting said knife means on said frame to permit said knife means to be periodically reciprocated forwardly and rearwardly to define a stroke which extends along a direction substantially parallel to said path of travel of the web of sheet material,
- means for periodically reciprocating said knife means along said stroke and at a forward speed substantially corresponding to the speed at which the web is advanced by said feeding means, and
- toggle means for closing said cutting blades to effect the cutting of the web of sheet material and then quickly opening the same to separate said blades during each forward reciprocation of said knife means, and for maintaining the separation of said cutting blades during each rearward reciprocation of said knife means.
An apparatus for accurately and efficiently cutting a continuous web of sheet material into individual cut segments of predetermined length, said apparatus comprising
- a frame,
- means carried by said frame for continuously feeding the web of sheet material along a predetermined path of travel,
- rocker arm means pivotally carried by said frame for pivotal movement about an axis extending transverse to and spaced from said path of travel,
- knife means carried by said rocker arm means and extending transversely across said path of travel for cutting the web of sheet material into individual cut segments, said knife means comprising a first cutting blade fixedly carried by said rocker arm means on one side of said path of travel, a second cutting blade positioned on the other side of said path of travel, and means for slideably mounting said second cutting blade on said rocker arm means such that the blades may be selectively closed to effect the cutting of the web and opened to permit the free passage of the web therethrough,
- means for periodically oscillating said rocker arm means and knife means about said transverse axis such that during the forward oscillation thereof said knife means is moved at a forward speed substantially corresponding to the speed at which the web is advanced by said feeding means, and
- toggle means for closing said cutting blades to effect the cutting of said web of sheet material and then quickly opening the same to separate said blades during each forward oscillation of said knife means, and for maintaining the separation of said cutting blades during each rearward oscillation of said knife means.
Dependencies are inferred from the claim text.