Back to results
US 9,457,982 B2Granted
Tear-assist blade
AssigneePregis Innovative Packaging LLC
InventorsThomas D. Wetsch, Robert Tegel
Life of this patent
Estimating the term…
Abstract
A material dispenser having a dispensing member configured to dispense a line of the material along a path in a downstream direction, and a cutting member having a cutting edge extending generally downstream with respect to the path. The cutting member having a convex shape across the path, such that the cutting edge engages and sequentially initiates cuts through the line of material when the line of material is pulled against the cutting member, thereby minimize cutting forces.
Claims20
A material dispenser, comprising:
- a dispensing member configured to dispense a line of the material along a path in a downstream direction;
- and
- a cutting member having a cutting edge extending generally downstream with respect to the path and having a convex shape across the path, such that the cutting edge engages and sequentially initiates cuts through the line of material when the line of material is pulled against the cutting member, thereby reducing cutting forces;
- wherein:
- the cutting member is pivotable about a blade axis extending generally transverse to the path such that the pulling of the line of material against the cutting member displaces the cutting member about the blade axis;
- and
- the material dispenser further comprises:
- a tear-assist unit operable to pull the line of material against the cutting member to initiate the cuts;
- and
- a sensing unit configured to detect the displacement of the cutting member and associated with the tear-assist unit to trigger the tear-assist unit to drive the line of material in a reverse direction along the path against the cutting member to initiate a tear in the line of material.
7 more elements
A material dispenser, comprising:
- a dispensing member configured to dispense a line of the material along a path in a downstream direction;
- a cutting member having a cutting edge extending generally downstream with respect to the path and having a convex shape across the path, such that the cutting edge engages and sequentially initiates cuts through the line of material when the line of material is pulled against the cutting member, thereby reducing cutting forces;
- a tear-assist unit that is operable to pull the line of material against the cutting member to initiate the cuts;
- and
- a sensing unit configured to detect a pulling of the line of material, wherein the sensing unit is associated with the tear-assist unit such that upon detection of the pulling of the line of material, the sensing unit triggers the tear-assist unit to drive the line of material in a reverse direction along the path against the cutting member to initiate a tear in the line of material.
2 more elements
Dependencies are inferred from the claim text.