G - Physics
03
B
101/92
G03B 27/20 (2006.01)
Patent
CA 1193137
ABSTRACT OF THE DISCLOSURE In a vacuum printer for the graphic arts having a bed, a blanket frame upon the bed including a flexible impervious blanket having a peripheral sealing bead, a glass frame juxtaposed over the blanket frame in snug registry with the blanket bead defining a contact printing chamber, the glass frame being movably mounted for opening and closing movements relative to the blanket frame, a vacuum source having a first vacuum conduit extending into communication with the printing chamber for evacuating it; the improvement which comprises a perforated blanket support plate within the blanket frame underlying the blanket and defining within the blanket frame a blanket chamber. A second vacuum conduit interconnects the vacuum source and the blanket chamber. An electronic control is connected to the conduits for evacuating the blanket chamber, and after a pre-set period evacuating the printing chamber. In the method of contact printing wherein the step of communicating vacuum to a vacuum printing chamber between a glass frame and a flexible blanket is preceded by the step of communicating vacuum to a blanket chamber below the blanket for a predetermined interval holding the blanket away from the glass frame until the vacuum printing chamber is fully evacuated.
423881
Maher Robert J.
Tooson Ronald
Douthitt Corporation
Frayne & Company Robert
LandOfFree
Vacuum printer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vacuum printer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum printer will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1249064