Integral Anti-Rollback for Injection Molded Tape Dispensers

摘要

A tape dispenser system includes a monolithic plastic injection molded frame with an integral anti-reverse rotation pawl. To help prevent the free end of a roll of tape from accidentally retracting, falling back, and frustratingly bonding onto the coiled portion of the tape, the pawl engages the inner diameter of a cardboard spool that holds the roll of tape. Strategically located mold parting lines and certain air gaps allow injection molding of a dispenser frame that has two spool-supporting sidewalls plus the integral pawl.

主权项

1. A tape dispenser system comprising:
a first sidewall; a second sidewall spaced apart from the second sidewall to define a spool-receiving chamber between the first sidewall and the second sidewall; a bridge providing an integral seamless connection between the first sidewall and the second sidewall; a first flange extending from the first sidewall toward the second sidewall, the first flange defining an air gap between a first segment of the first flange and a second segment of the first flange; a second flange extending from the second sidewall toward the first sidewall; a spool having selectively an installed position and a removed position, the spool being radially supported by the first flange and the second flange within the spool-receiving chamber when the spool is in the installed position, the spool being outside of the spool-receiving chamber when the spool is in the removed position, the spool being tubular and having an axial length and an inner surface; an adhesive tape wrapped around the spool; and a first pawl extending from at least one of the first sidewall and the first flange, the first pawl having a first tip that is spaced apart from both the first sidewall and the second sidewall, the first tip engaging a point of contact on the inner surface of the spool when the spool is in the installed position, the first tip being between the air gap and the point of contact on the inner surface of the spool when the spool is in the installed position.