Toner fixing method and receiving sheet
AssigneeEastman Kodak Company
InventorsDonald S. Rimai, Muhammad Aslam
Life of this patent
Estimating the term…
Abstract
A dry toner image is fixed to a thermoplastic layer on a receiving sheet by pressing a ferrotyping web against the image in the presence of sufficient heat to soften the layer. A curl preventing layer opposite the thermoplastic layer does not offset on a backing roller or the like because it has a melting point that is high compared to the thermoplastic layer.
Claims11
An image bearing receiving sheet comprising:
- a paper support,
- a thermoplastic layer on one side of said support having a toner image at least partially embedded therein, said thermoplastic layer having a glass transition temperature between 45.degree. and 70.degree. C., and
- a curl preventing layer on the other side of said support to prevent curl of said sheet in changing ambient conditions and having a melting temperature above 115.degree. C.
A receiving sheet usable in a process in which an unfixed toner image is formed on a thermoplastic layer on one side of a receiving sheet, and the toner image is fixed by heating the thermoplastic layer above its glass transition temperature while applying pressure to the thermoplastic layer and toner image with a pressure applying means which includes a pressure member which contacts the other side of the receiving sheet, said receiving sheet including a support, a thermoplastic layer on one side of said support, and a curl preventing layer on the other side of said support to prevent curl of said sheet when subjected to changes in temperature and humidity and having a melting temperature above 115.degree. C. and a glass transition temperature higher than that of the thermoplastic layer.
A receiving sheet having an unfixed toner image that is formed on a thermoplastic layer on one side of the receiving sheet, and the receiving sheet is usable in a process wherein the toner image is fixed by heating the thermoplastic layer above its glass transition temperature while applying pressure to the thermoplastic layer and unfixed toner image with a pressure applying means which includes a pressure member which contacts the other side of the receiving sheet, said receiving sheet including a support;
- the thermoplastic layer on one side of said support, the thermoplastic layer having a glass transition temperature between 45.degree. C. and 70.degree. C.;
- and a curl preventing layer on the other side of said support to prevent curl of said sheet when subjected to changes in temperature and humidity, the curl preventing layer having a melting temperature above 115.degree. C. to prevent offset of the curl preventing layer onto the pressure member when the pressure member is heated to a temperature below the melting temperature of the curl preventing layer but above the glass transition temperature of the thermoplastic layer.
Dependencies are inferred from the claim text.