Typewriting machines – Annular typewriter
Patent
1984-04-11
1985-04-16
Burr, Edgar S.
Typewriting machines
Annular typewriter
101 1, 101DIG13, B41J 300
Patent
active
045112681
ABSTRACT:
In a method and apparatus for high speed printing, an image of a character is directed onto a charged photoconductive disc so as to cause discharge of an area of the circumferential periphery of the disc corresponding to the character. Toner is applied electrostatically to the discharged area to provide adherence. The disc is moved relative to, and in contact with, a receiver such as a sheet of paper on a roller. The disc is rotated at a constant speed corresponding to a rate of linear translation of the disc relative to the receiver, such that there is no relative movement at the point of contact. The toner adhered to the disc is transferred electrostatically to the receiver at the point of contact, and is thereafter fixed on the receiver by a fixing means which travels with the disc and at a spacing behind the disc. Successive character images may be obtained by relative movement of an electromagnetic beam and a font of items, and an optical system may be included between the font and the carrier disc for varying the dimensions of a selected item.
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"Machine Design", vol. 49, No. 23, issued Oct. 1977, (Cleveland), T. A. Miller, Printers with a Soft Touch, pp. 40-44.
Journal of Electronic Engineer, No. 117, issued Sep. 1976, (Tokyo, Japan), T. Kitamura, "High Contrast Electrophotography and Laser Beam Meet for Computer Output Line Printer", pp. 28-31, see pp. 28-30, Fig. 2.
Burr Edgar S.
Weresh John A.
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