| 摘要 |
<p>1376628 Electrostatic printing apparatus XEROX CORP 13 Dec 1971 [14 Dec 1970] 57757/71 Heading B6C An electrostatic printing apparatus includes an endless belt 12 of photoconductive material, which receives a series of latent images at an exposure station A, has toner applied to it at a developing station B and transfers the developed images to a series of sheets at a transfer station C. The various operations related to sheet feed, exposure, &c. take place in sequence in a cycle initiated by arrival of a sheet at the transfer station C and at times controlled by the belt speed. Preferably a timer T driven in sychronism with a roller 19, which contacts the reverse sides of the sheets at the transfer station, emits a series of pulses at a rate determined by the speed of the belt, and the operations of the machine take place on specific pulses. The roller 19 may have a circumference which exceeds the length of an individual sheet.</p> |
