Photocopying machines


1,023,601. Photocopying apparatus. LAWES BROS Ltd. June 23, 1964 [June 26, 1963], No. 25414/63. Heading G2A. In a photocopying machine in which the original and copy sheet are conveyed together in contact round a translucent cylinder 1 housing a light source 2 by a number of separate endless bands 7 spaced along the length of the cylinder, the areas of the copy sheet registering with the bands is given a different degree of exposure from those areas registering with the spaces between the bands. As shown, this is effected by a comb plate 5 fixed to an air-duct 4 which is located within the cylinder 1, and which also carries a reflector 3. The comb plate has a castellated edge with cutaway'slots 6 corresponding to the spaces between the bands 7. Thus as the sheets are carried round the exposure cylinder, those areas passing below the slots 6 will receive more exposure than the remaining areas. It is stated that this differential exposure tends to eliminate the streakiness sometimes obtained with separate conveyor belts.




Download Full PDF Version (Non-Commercial Use)

Patent Citations (0)

    Publication numberPublication dateAssigneeTitle

NO-Patent Citations (0)


Cited By (0)

    Publication numberPublication dateAssigneeTitle