Tape drive closure operator

Details Tape drive closure operator Tape drive closure operator

E - Fixed Constructions

05

F

268/25

E05F 15/10 (2006.01) E05F 15/16 (2006.01)

Patent

CA 1209601

TAPE DRIVE CLOSURE OPERATOR ABSTRACT OF THE DISCLOSURE A closure operator such as a garage door oper- ator utilizes an apertured flexible tape. The tape is enclosed in a guide and a drive sprocket has teeth engag- ing the apertures to apply both tension and compression forces to open and close a door. The apertures are en- larged in width and length and the tape has fewer aper- tures per-unit-length compared to the prior art tape. This decreases the stress per-unit-area in the tape at each tooth and increases the shear strength of the webs between successive apertures to be more nearly equal to the tensile strength of the tension band areas of the tape. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

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