초록 ▼

Apparatus for graphic arts plate making suitable for exposing diazo plates and the like. A unit providing an exposure bed with a plurality of lamps close to the negative and plate and operating in the ultraviolet region, and another plurality of lamps in the visible light region with a diffused glas

Apparatus for graphic arts plate making suitable for exposing diazo plates and the like. A unit providing an exposure bed with a plurality of lamps close to the negative and plate and operating in the ultraviolet region, and another plurality of lamps in the visible light region with a diffused glass top for a work table and for fixing an exposed plate. Separate control units for each exposure lamp to provide uniform radiation from all lamps to the plate.

대표청구항 ▼

Apparatus for exposing diazo printing plates and the like, including in combination: a frame; a plurality of tubular lamps mounted in said frame in spaced parallel relation, said lamps having a narrow band spectral output at the 365 nanometer wave length region for imagewise exposing a radiation sen

Apparatus for exposing diazo printing plates and the like, including in combination: a frame; a plurality of tubular lamps mounted in said frame in spaced parallel relation, said lamps having a narrow band spectral output at the 365 nanometer wave length region for imagewise exposing a radiation sensitive sheet; a bed mounted in said frAme for supporting sensitive sheet parallel to the plane of said lamp; a plurality of radiation sensors, with a sensor mounted adjacent each lamp; and a plurality of control circuits, with a circuit for each lamp, each of said control circuits including means for energizing the associated lamp in response to a start signal and deenergizing the lamp when the lamp has provided a predetermined quantity of radiation as measured by the corresponding sensor.