Web feed mechanism and door with static protrusions

Details Web feed mechanism and door with static protrusions Web feed mechanism and door with static protrusions

1986-03-25

1988-12-13

Gilreath, Stanley N.

Advancing material of indeterminate length

Means to engage longitudinally spaced modifications in material

Pins on flexible belt or chain

226 76, G03B 122

Patent

active

047904674

ABSTRACT:
A feed mechanism for moving a web is disclosed. It includes a means for engaging the web that has a plurality of uniformly spaced drive pins for extending through and engaging web perforations. It also includes a means for guiding the web onto the drive pins, such as a door, and it includes a guiding surface that extends below the upper end of the pins. The guiding surface includes a static protrusion that extends below the guiding surface and urges the web and its associated perforation down onto the drive pin in that portion of the tractor where the drive pins are inserted into the web perforations.

REFERENCES:
patent: 3033445 (1962-05-01), Dreyer
patent: 4129239 (1978-12-01), Hubbard
patent: 4226353 (1980-10-01), Blaskovic et al.
patent: 4611737 (1986-09-01), Hubbard et al.

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