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US 4,540,393 AGranted
Variable length tab-forming device for tape roll holders
OwnerJack P. Knoopinventor
Life of this patent
Estimating the term…
Abstract
A tab-forming device for adhesive tape dispensers which provides for variable length tabs by incorporating a ratchet spool and pawl in a flexible spring for expanding the spacing between two attached diverging tab-forming struts. The device may be attached to existing tape roll dispensers or molded as an integral part with the dispenser.
Claims19
A molded polymer tab forming device for attachment to a tape dispenser comprising,
- (a) a pair of upwardly extending forward and rearward struts, having lower and upper extremities,
- (b) a flexible spring comprising a cylinder having a lateral slot with front and back edges, said lower extremities of the forward and rearward struts joined respectively to said front and back edges of said slot, said struts being biased by said spring to diverge upwardly at the upper extremities, forming a spaced open position, the upper extremities of the struts each terminating in a wing, the wing of the forward strut having a forward extending tear-off section, the two wings abutting when said forward strut is pushed against said rearward strut, thereby defining a closed position, said wings forming tape tabs by movement of the struts between open and closed positions,
- (c) means for varying the diameter of said cylinder and altering the spacing between said upper extremities of said struts in said spaced open position to enable formation of tape tabs of variable lengths upon movement of said forward strut between said open and closed positions, and
- (d) anchor means on said rearward strut for rapid coupling to a tape dispenser.
1 more element
A molded polymer tape roll dispenser having a tap-forming device comprising,
- (a) a tape roll holder having a forwardly upwardly extending tape support station with upper and lower extremities,
- (b) a forward upwardly extending strut with upper and lower extremities,
- (c) a flexible spring comprising a cylinder having a lateral slot with front and back edges, said lower extremities of the station and strut joined respectively to the back and front edges of said slot, said strut being biased by said spring to diverge upwardly from the upper extremity of the station, forming a spaced-open position, the upper extremities of the station and strut each terminating in a wing, the wing of the strut having a forward extending tear-off section, the two wings abutting when said forward strut is pushed against said station thereby defining a closed position, said wings forming tape tabs by movement of the strut between open and closed position to the station, and
- (d) means for varying the diameter of said cylinder and altering the spacing between said upper extremities of said support station and said strut in said spaced-open position to enable formation of tape tabs of variable lengths upon movement of said strut between said open and closed positions.
1 more element
A molded polymer tape roll dispenser having a tab-forming device comprising,
- (a) a tape roll holder having a forwardly upwardly extending tape support station with upper and lower extremities,
- (b) a forward upwardly extending strut with upper and lower extremities,
- (c) a flexible spring comprising a cylinder having a lateral slot with front and back edges, said lower extremities of the station and strut joined respectively to the back and front edges of said slot, said strut being biased by said spring to diverge upwardly from the upper extremity of the station, forming a spaced-open position, the upper extremities of the station and strut each terminating in a wing, the wing of the strut having a forward extending tear-off section, the two wings abutting when said forward strut is pushed against said station thereby defining a closed position, said wings forming tape tabs by movement of the strut between open and closed position to the station,
- (d) a pawl extending parallel to and toward the center axis of said cylinder from said back edge of said slot, and
- (e) a ratchet spool insertable in said cylinder, having a circular solid wall with open, circular ends and having pawl seats of increasing depth in said wall parallel to said slot for insertion of said pawl whereby the diameter of said cylinder is varied and the spacing between said upper extremities of said support station and said strut in said spaced-open position is altered to enable formation of tabs of variable lengths upon movement of said strut between said open and closed positions.
2 more elements
Dependencies are inferred from the claim text.