1
Robert M Barto, Loren E Shelffo: Apparatus for eliminating ammonia fumes emanating from diazo copiers. Blu Ray Incorporated, Francis J Murphy, John M Calimafde, Roy C Hopgood, November 22, 1977: US04059409 (24 worldwide citation)

Apparatus for the elimination of noxious ammonia fumes associated with diazo copiers includes a plenum chamber disposed about the output aperture of the machine developer chamber. Vacuum means are provided to draw the ammonia laden air out of this chamber. Preferably this apparatus is used in conjun ...


2
Loren E Shelffo: Toner applicator for electrostatic copier. Eskofot Research, Michael Ebert, November 11, 1980: US04232628 (18 worldwide citation)

An applicator for depositing toner particles onto an electrostatically-charged latent image formed on a photoconductive insulating layer to render visible and develop this image. The applicator includes a trough containing a supply of toner and provided with a flexible blade of dielectric material w ...


3

4

5

6

7

8

9

10


Click the thumbnails below to visualize the patent trend.