Electrostatic imaging method using a polytetrafluoroethylene coa

Details Electrostatic imaging method using a polytetrafluoroethylene coa Electrostatic imaging method using a polytetrafluoroethylene coa

1974-05-22

1976-03-30

Brammer, Jack P.

Gas separation: apparatus

Magnetic separating means

96 1R, 252 621P, 427 14, 427 18, 427 20, 428900, G03G 1300, G03G 900

Patent

active

039472710

ABSTRACT:
A carrier bead is disclosed having a core and at least an outer coating of polytetrafluoroethylene or fluorinated ethylene propylene. Use of these fluoropolymers as carrier coatings results in extremely long carrier life and overcomes problems that have heretofore plagued the commercialization of a magnetic brush development system for a plain paper electrostatic copying apparatus.

REFERENCES:
patent: 3507686 (1970-04-01), Hagenbach et al.
patent: 3533835 (1970-10-01), Hagenbach et al.
patent: 3598648 (1971-08-01), Hayashi et al.
patent: 3778262 (1973-12-01), Queener et al.
patent: 3798167 (1974-03-01), Kukla et al.
Encyclopedia of Polymer Science and Technology, Vol. 31, pp. 663-668; 1970.
Du Pont Publication "Teflon TFE and FEP Non-Stick Finishes" pp. 1-10.

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