Dispenser for rolls of flexible sheet material and cutter mechanism for use therein
First Claim
1. In a dispenser for rolls of flexible sheet material having,a chassis adapted to be attached to a wall,means carried by said chassis for rotatably supporting a roll of flexible sheet material,means operatively connected to said chassis for guiding a web of flexible sheet material from the roll to a position to be grasped by a user so that the user may pull the web out of the dispenser,mechanism mounted on said chassis for cutting the web at intervals therealong to divide the web into individual sheets,the improvement wherein said cutting mechanism includes:
- a rotatably mounted feed roller on the chassis and over which the web of material passes,a knife pivotally mounted in the feed roller to swing about an axis which is laterally displaced from the plane of the knife cutting edge, said knife having a radially outward portion defining said cutting edge for the web, said edge being projected outwardly through an opening in said feed roller beyond the periphery of the feed roller to cut the web as it passes over the feed roller,cam follower means affixed to the knife at a point displaced from the pivot mounting axis of the knife so that said cam follower means is swingable along an arcuate path about said axis, andcam means stationarily mounted on the chassis and having a first cam surface engaged with said cam follower means to swing said cam follower means along said arcuate path to positively project the knife cutting edge upon rotation of the feed roller and having a second cam surface engaging said cam follower to swing said cam follower means along said arcuate path to positively retract the knife cutting edge upon further rotation of said roller.
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Accused Products
Abstract
A mechanism for cutting a web of flexible sheet material which is adapted to be used in a dispenser having a feed roller and a pinch roller between which rollers the web passes. A knife is pivotally mounted in the feed roller to swing about an axis laterally displaced from the plane of a radially outward portion of the knife defining a cutting edge which edge is projected outwardly beyond the periphery of the feed roller to cut the web as it passes over the feed roller and cam followers are carried by the ends of the knife extending beyond the ends of the feed roller with the followers displaced from the pivot mounting axis of the knife. Stationary cams are mounted adjacent the ends of the feed roller with which the cam followers on the knife engage to positively project the knife cutting edge beyond the feed roller periphery and retract the cutting edge upon rotation of the feed roller.
54 Citations
10 Claims
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1. In a dispenser for rolls of flexible sheet material having,
a chassis adapted to be attached to a wall, means carried by said chassis for rotatably supporting a roll of flexible sheet material, means operatively connected to said chassis for guiding a web of flexible sheet material from the roll to a position to be grasped by a user so that the user may pull the web out of the dispenser, mechanism mounted on said chassis for cutting the web at intervals therealong to divide the web into individual sheets, the improvement wherein said cutting mechanism includes: -
a rotatably mounted feed roller on the chassis and over which the web of material passes, a knife pivotally mounted in the feed roller to swing about an axis which is laterally displaced from the plane of the knife cutting edge, said knife having a radially outward portion defining said cutting edge for the web, said edge being projected outwardly through an opening in said feed roller beyond the periphery of the feed roller to cut the web as it passes over the feed roller, cam follower means affixed to the knife at a point displaced from the pivot mounting axis of the knife so that said cam follower means is swingable along an arcuate path about said axis, and cam means stationarily mounted on the chassis and having a first cam surface engaged with said cam follower means to swing said cam follower means along said arcuate path to positively project the knife cutting edge upon rotation of the feed roller and having a second cam surface engaging said cam follower to swing said cam follower means along said arcuate path to positively retract the knife cutting edge upon further rotation of said roller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification