Abstract: A method for sensing a paper skew adapted for a device having a paper feeding mechanism is provided. The device has a feed sensor which is fixed at a start position of paper feeding; and, a position sensor which moves in a direction perpendicular to a direction of paper feeding and passes through a first and a second positions. The first position is the intersection of a moving path of the position sensor and a line. The feed sensor is on the line, and the line is parallel to the direction of paper feeding. The method includes the device having a first distance; moving the position sensor to the second position; feeding a work paper into the device; obtaining a second distance which is a moving distance of the work paper fed; and determining whether the work paper is skewed or not according to the difference between the first and the second distances.

Abstract: A method for sensing a paper skew adapted for a device having a paper feeding mechanism is provided. The device has a feed sensor which is fixed at a start position of paper feeding; and, a position sensor which moves in a direction perpendicular to a direction of paper feeding and passes through a first and a second positions. The first position is the intersection of a moving path of the position sensor and a line. The feed sensor is on the line, and the line is parallel to the direction of paper feeding. The method includes the device having a first distance; moving the position sensor to the second position; feeding a work paper into the device; obtaining a second distance which is a moving distance of the work paper fed; and determining whether the work paper is skewed or not according to the difference between the first and the second distances.

Abstract: A blotting fillister structure including a first side, a second side and a blotting area is provided. The first side has a first lead-angle surface. The second side opposite to the first side has a second lead-angle surface. The blotting area is located between the first side and the second side. A width of the first lead-angle surface is greater than a width of the second lead-angle surface.

Abstract: A method for sensing a paper skew adapted for a device having a paper feeding mechanism is provided. The device has a feed sensor which is fixed at a start position of paper feeding; and, a position sensor which moves in a direction perpendicular to a direction of paper feeding and passes through a first and a second positions. The first position is the intersection of a moving path of the position sensor and a line. The feed sensor is on the line, and the line is parallel to the direction of paper feeding. The method includes the device having a first distance; moving the position sensor to the second position; feeding a work paper into the device; obtaining a second distance which is a moving distance of the work paper fed; and determining whether the work paper is skewed or not according to the difference between the first and the second distances.

Abstract: A method for sensing a paper skew adapted for a device having a paper feeding mechanism is provided. The device has a feed sensor which is fixed at a start position of paper feeding; and, a position sensor which moves in a direction perpendicular to a direction of paper feeding and passes through a first and a second positions. The first position is the intersection of a moving path of the position sensor and a line. The feed sensor is on the line, and the line is parallel to the direction of paper feeding. The method includes the device having a first distance; moving the position sensor to the second position; feeding a work paper into the device; obtaining a second distance which is a moving distance of the work paper fed; and determining whether the work paper is skewed or not according to the difference between the first and the second distances.

Abstract: A method for sensing a paper skew adapted for a device having a paper feeding mechanism is provided. The device has a feed sensor which is fixed at a start position of paper feeding; and, a position sensor which moves in a direction perpendicular to a direction of paper feeding and passes through a first and a second positions. The first position is the intersection of a moving path of the position sensor and a line. The feed sensor is on the line, and the line is parallel to the direction of paper feeding. The method includes the device having a first distance; moving the position sensor to the second position; feeding a work paper into the device; obtaining a second distance which is a moving distance of the work paper fed; and determining whether the work paper is skewed or not according to the difference between the first and the second distances.

Abstract: A blotting fillister structure including a first side, a second side and a blotting area is provided. The first side has a first lead-angle surface. The second side opposite to the first side has a second lead-angle surface. The blotting area is located between the first side and the second side. A width of the first lead-angle surface is greater than a width of the second lead-angle surface.

Abstract: A paper feeding method for a printer is provided. The method includes the steps of: feeding a paper for printing a first side of the paper; lifting an up-feeding cap and feeding the paper to a place between the up-feeding cap and a feed roller when the first side of the paper is finished printing; laying down the up-feeding cap after a predetermined duration; and reversing the paper for printing the other side of the paper. The method is suitable for two-side printing and capable of avoiding paper jam or paper damage due to paper distortion by ink.

Abstract: A method for sensing a paper skew adapted for a device having a paper feeding mechanism is provided. The device has a feed sensor which is fixed at a start position of paper feeding; and, a position sensor which moves in a direction perpendicular to a direction of paper feeding and passes through a first and a second positions. The first position is the intersection of a moving path of the position sensor and a line. The feed sensor is on the line, and the line is parallel to the direction of paper feeding. The method includes the device having a first distance; moving the position sensor to the second position; feeding a work paper into the device; obtaining a second distance which is a moving distance of the work paper fed; and determining whether the work paper is skewed or not according to the difference between the first and the second distances.

Abstract: A sheet-feeding module for double-side printing suitable to be built in a printing device is disclosed. The sheet-feeding module includes a sheet-feeding mechanism, a sheet-transferring path, a sheet-printing path a first sensor, a first sheet-conveying mechanism, a sheet-discharging path and a sheet-returning path. The first sheet-conveying mechanism is suitable for conveying back the sheet with one side printed which is on the sheet-discharging path, via the sheet-returning path, onto the sheet-feeding mechanism, and then the sheet with one side printed is conveyed onto the sheet-printing path again by the sheet-feeding mechanism for performing the printing of the other side of the sheet. Therefore, the printing device with the built-in sheet-feeding module for double-side printing, without an additional plug-in double-side printing module of prior art, not only the cost required in a printing device with double-side printing function can be reduced but also the double-side printing efficiency enhanced.