System for registering to a moving web

Details System for registering to a moving web System for registering to a moving web

1989-08-25

1990-10-16

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Microcapsule, process, composition, or product

430211, 430350, 430460, 428327, G03C 168, G03C 172

Patent

active

049634593

ABSTRACT:
The present invention provides a method of registering to an imaging web moving within an imaging web handling apparatus along an imaging web path. The imaging web comprises a support having a coating of photosensitive microcapsules on the surface thereof. The photosensitive microcapsules have an internal phase of a photosensitive composition and a color former. Exposure of the imaging web to actinic radiation defines an image area and a border area.
A registration mark is formed on the web by exposing a portion of the web area to actinic radiation so that the portion undergoes a color or reflection change, or exposing all but a portion of the border area to actinic radiation so that the exposed area undergoes a color or reflection change. The registration mark is detected and in response to detection of the registration mark, an operation is performed on the imaging web.

REFERENCES:
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patent: 3820884 (1974-06-01), Sone et al.
patent: 4399209 (1983-08-01), Sanders et al.
patent: 4440846 (1984-04-01), Sanders et al.
patent: 4519868 (1985-05-01), Hoffmann
patent: 4532596 (1985-07-01), Pugsley
patent: 4578340 (1986-03-01), Saccocio et al.

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