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US 5,208,628 AGranted
Image forming apparatus
AssigneeSharp Kabushiki Kaisha
InventorsKunio Ohashi, Shoichi Nagata
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AssigneeSharp Kabushiki Kaisha
InventorsKunio Ohashi, Shoichi Nagata
Estimating the term…
An image forming apparatus makes use of a photosensitive sheet having a surface coated with microcapsules encapsulating a light-curable agent and a colorless dye and an image transfer sheet having one surface coated with a developing agent having an chromogenic effect on the encapsulated colorless dye. These sheets are superposed one on top of the other and pressed together by a compression device to selectively rupture the microcapsules on the photosensitive sheet, forming a visible image on the image transfer sheet which is thereafter heated by a heating device. Either the speed at which the image transfer sheet is passed through the compression device or the temperature at which the image transfer sheet is heated by the heating device is controlled according to a characteristic of the image transfer sheet such as its thickness, electrostatic capacity and light transmissivity.
In an image forming apparatus adapted to form an image by superposing an image transfer sheet over a photosensitive sheet, said photosensitive sheet having a surface of a sheet-like base material thereof coated with microcapsules encapsulating a light-curable agent and a colorless dye and said image transfer sheet having one surface of a sheet-like base material thereof coated with a developing agent having a chromogenic effect on said colorless dye, rupturing unhardened ones of said microcapsules by compressing said photosensitive sheet and said image transfer sheet superposingly together by means of a compressive device, and heating said image transfer sheet by means of a heating device, the improvement wherein said image forming apparatus comprises:
In an image forming apparatus adapted too form an image by superposing an image transfer sheet over a photosensitive sheet, said photosensitive sheet having a surface of a sheet-like base material thereof coated with microcapsules encapsulating a light-curable agent and colorless dye and said image transfer sheet having one surface of a sheet-like base material thereof coated with thermoplastic resin together with a developing agent having a chromogenic effect on said colorless dye, rupturing unhardened ones of said microcapsules by compressing said photosensitive sheet and said image transfer sheet superposingly together by means of a compression device, and heating said thermoplastic resin of said image transfer sheet by means of a heating device for the purpose of glossing an image on said image transfer sheet, the improvement wherein said image forming apparatus comprises:
In an image forming apparatus adapted to form an image by superimposing an image transfer sheet over a photosensitive sheet, said photosensitive sheet having a surface of a sheet-like base material thereof coated with microcapsules encapsulating a light-curable agent and a colorless dye and said image transfer sheet having one surface of a sheet-like base material thereof coated with a developing agent having a chromogenic effect on said colorless dye, rupturing unhardened ones of said microcapsules by compressing said photosensitive sheet and said image transfer sheet superposingly together by means of a compression device, and heating said image transfer sheet by means of a heating device, the improvement wherein said image forming apparatus comprises:
In an image forming apparatus adapted to form an image by superimposing an image transfer sheet over a photosensitive sheet, said photosensitive sheet having a surface of a sheet-like base material thereof coated with microcapsules encapsulating a light-curable agent and a colorless dye and said image transfer sheet having one surface of a sheet-like base material thereof coated with a developing agent having a chromogenic effect on said colorless dye, rupturing unhardened ones of said microcapsules by compressing said photosensitive sheet and said image transfer sheet superposingly together by means of a compression device, and heating said image transfer sheet by means of a heating device, the improvement wherein said image forming apparatus comprises:
Dependencies are inferred from the claim text.