Vacuum blanket for pin registration
AssigneenuArc Company, Inc.
InventorsCharles J. Leonhart, William R. Walters
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Abstract
A vacuum blanket apparatus for maintaining precise registration between an image forming sheet and a light sensitive sheet when subjected to controlled exposure to light passing through a glass panel includes a vacuum blanket having an upper cover of flexible sheet material adapted to contact the light sensitive sheet for biasing the same and said image sheet toward a planar face of the glass panel when the panel is locked in position parallel to the vacuum blanket. The blanket cover is formed with at least one elongated slot for receiving one or more registration pins for registering the image forming and light sensitive sheets. At least one deformable resilient pressure element in the slot is deformable to bias the sheets toward the glass panel.
Claims20
A vacuum blanket apparatus for maintaining precise registration between a light sensitive sheet and an image forming sheet placed in covering relation thereon for controlled light exposure for reproducing said image, comprising:
- a vacuum blanket assembly including a blanket of thin flexible sheet material for biasing said sheets toward a planar surface and having an elongated slot therein;
- a light transmitting, rigid panel defining said planar surface for transmitting light to said image forming sheet in contact therewith for reproducing said image on said light sensitive sheet;
- rigid platen means in spaced parallel relation with said panel for supporting said vacuum blanket thereon during reproduction of said image;
- registration means in said elongated slot for registering said sheets;
- and
- bladder means in said slot deformable under pressure for biasing said sheets toward said panel.
A vacuum blanket for biasing an image forming sheet in registration with a light sensitive sheet toward a planar surface of a light transmitting panel, comprising:
- a blanket of thin flexible sheet material for supporting said sheets and formed with an elongated slot therein;
- platen means for supporting said vacuum blanket in spaced apart parallel relationship with said panel;
- and
- deformable bladder means in said slot for biasing said sheets toward said panel.
Dependencies are inferred from the claim text.