Abstract: The automatic image-property identification is applied for a two-dimensional object on the document table of a scanner. Various informative frames are used for circumscribing the borders of the document sheets. Each frame type is associated with the image properties of a sheet size. The frame types and their associated image properties are stored in a template. When scanning, the program first detects the features of the frame type currently in use. After a frame type is found, the photoelectric converting device can directly read the image properties of the sheet from the template without a prescan.

Abstract: The present invention provides a photo printer with an adjustable thermal print head. The printer includes a cantilever mechanism that raises or lowers a thermal print head for either removing a photo or printing the photo. The force exerted on the thermal print head is adjusted by an adjusting mechanism which uses an elastic mechanism with an adjusting screw and a spring. A platen roller feeds the photo through the device. The contacting stress between the thermal print heads and the platen roller is individually adjusted so that pressure can be maintained evenly at all times.

Abstract: The present invention relates to a paper feeding module of a color picture printer for driving a picture back and forth through a printing module of the printer for printing. The printer comprises a housing. The printing module is installed inside the housing for printing the paper. The paper feeding module comprises a first roller, a second roller and an elastic device. The first roller is horizontally installed inside the housing and is rotatable. The second roller comprises at least two cylindrical sleeves mounted onto a revolving axle for clamping the paper with the first roller. The second roller is installed in parallel with, in contact with and above the first roller inside the housing, is moveable in a vertical direction, and is rotatable. When the first and second rollers are rotated in opposite directions, the paper is clamped and driven between the first roller and the sleeves of the second roller.