Photocopying – Contact printing – Light boxes
Patent
1993-05-21
1995-01-31
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355295, G03G 1520
Patent
active
053862813
ABSTRACT:
A thermal fixing device including a pair of rotating rollers which are press-contacted to each other, a heating section associated with at least one of the rollers and an image supporter having an unfixed toner image which is passed through a gap between the rollers so that the unfixed toner image is thermally (melt) fixed, the heating section having an integral structure type heating and cooling device which includes a cooler and a heater acting as a support, and wherein the fixing device further includes a thin endless metal belt which rotates while contacting the integral structure type device and which has a non-adhesive film on the outer surface of the belt, and a drive roller which drives the endless metal belt for rotation while applying tension to the endless metal belt. The surface temperature at a portion where the endless metal belt is in pressure-contact with the image supporter is first increased to a temperature (Tm) near the melting point of the toner and then cooled so that the image supporter can be stripped prior to the endless metal belt, and so that the temperature is higher than the glass transition point of the toner and lower than the softening point of the toner.
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Mitani Masao
Shimizu Kazuo
Braun Fred L.
Hitachi Koki Co,. Ltd.
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