Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Rotating sprocket
Patent
1976-05-13
1977-05-10
Schacher, Richard A.
Advancing material of indeterminate length
Means to engage longitudinally spaced modifications in material
Rotating sprocket
226 87, G03B 124
Patent
active
040223655
ABSTRACT:
An improved pin feed platen providing a positive pulling force on a print medium in a forward and reverse direction at the forward and reverse exit locations of a platen work station and affording easy initial loading of the medium to be transported.
A platen pin feed assembly includes housing means mounted for rotation with a platen and having a plurality of radially extending feed pin bores distributed about the axis of rotation, a plurality of feed pins each radially translatably received in a different one of the feed pin bores and each having an inner end, a tapered outer end and a camming slot located therebetween, and a camming member non-rotationally mounted with respect to the housing means.
The camming member has a compound camming surface extending about the axis of rotation of the platen and received within the camming slots of the feed pins control the radial position of the feed pin in a predetermined fashion so that each feed pin is partially extended at the rear of the platen to a position in which the outer ends thereof are visible to an operator. Because the ends of the feed pins are visible in this region, mating longitudinally arranged perforations in the medium can be easily fitted over the ends of the partially extended feed pins during loading.
REFERENCES:
patent: 2400226 (1946-05-01), Euth
patent: 2822167 (1958-02-01), Metzner
Qume Corporation
Schacher Richard A,.
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