US 4,176,949 A · Microfiche exposer

Abstract

A rotary open-ended tubular drum of transparent material is supported within a housing by a pair of spaced support rolls and an endless flexible belt entrained over a pair of spaced apart feed rolls, the belt being generally opposed to the support rolls. The belt and drum are driven by a motor to feed a master sheet and a sensitized sheet to be printed, in face-to-face contact, between a drum engaging feeding flight portion of the belt and the portion of the drum engaged by the belt. An ultraviolet lamp is mounted in outwardly spaced relation to one end of the drum, and delivers ultraviolet light axially toward the interior of the drum. A stationary mirror within the drum is positioned to reflect ultraviolet light from the lamp toward an interior surface of the portion of the drum that is engaged by the feeding flight of the belt. A mask within the drum confines the reflected light to a given limited portion of the drum, and cooling fans are used to maintain the drum in a cool condition and to remove heated air from the housing.

Claims7

Dependent claims

A microfiche exposer comprising:

(a) a housing;
(b) a rotary open-ended tubular drum of transparent material;
(c) means supporting said drum in said housing for rotation on its own axis;
(d) a pair of spaced apart feed rolls journaled within said housing on axes parallel to the axis of said drum;
(e) a flexible belt entrained over said feed rolls and having a feeding flight between said rolls entrained over a circumferentially extended outer surface portion of said drum for reception of a master film and a sensitized sheet in face-to-face engagement between said outer surface portion of the drum and said feeding flight;
(f) an ultraviolet lamp mounted in said housing axially outwardly of one end of said drum and disposed to direct ultraviolet light axially into said drum;
(g) a mirror;
(h) means mounting said mirror in a stationary position within said drum and disposing said mirror to reflect light from said lamp in a direction radially of said drum toward the interior surface of the area thereof engaged by said belt;
(i) means for imparting film and sheet conveying movement to said belt and rotation to said drum;
(j) and means for moving a current of cooling air longitudinally through said drum.

7 more elements

Dependencies are inferred from the claim text.

Microfiche exposer

Life of this patent

Microfiche exposer

Life of this patent

Abstract

Claims7