Abstract: A scanning method in which a scanning head moves back and forth to scan a paper sheet located in a scanning window is disclosed. The method of the present invention includes the steps of a) making the paper sheet go forward a first distance into the scanning window; b) the scanning head scanning a portion of the paper sheet; c) the transmission mechanism driving the scanning head to move a second distance in a first direction, wherein the second distance is smaller than the first distance; d) repeating the steps b) and c) until the scanning head completely scans a plurality of portions of the paper sheet in the scanning region; e) repeating the steps a), b), c) and d), except that the scanning head moves in a second direction opposite to the first; f) repeating the steps a), b), c), d), and e), the movement of the scanning head alternating between a first and second direction, until the scanning head completely scans the paper sheet to be scanned.

Abstract: A light source device including light emitting elements is provided. The light source device includes a print circuit board having a plurality of recesses formed of truncated elliptical/or rectangular cones in a linear arrangement formed thereon, a plurality of light emitting elements and an emission-permeable window part disposed in each of the recesses. Each of the recesses has a flat bottom and an elliptical/or a rectangular cross section along the direction of the linear arrangement of the recesses in the print circuit board. One of the light emitting elements is disposed on the flat bottom of each of the recesses. Each light emitting element unit has an elongated illuminant surface along the longitudinal direction of the print circuit board due to the package thereof. The light emitting element units constitute a linear light source along this direction, and each light emitting element unit has an increased luminance flux along this direction.

Abstract: A light source device including light emitting elements is provided. The light source device includes a print circuit board having a plurality of recesses formed of truncated elliptical/or rectangular cones in a linear arrangement formed thereon, a plurality of light emitting elements and an emission-permeable window part disposed in each of the recesses. Each of the recesses has a flat bottom and an elliptical/or a rectangular cross section along the direction of the linear arrangement of the recesses in the print circuit board. One of the light emitting elements is disposed on the flat bottom of each of the recesses. Each light emitting element unit has an elongated illuminant surface along the longitudinal direction of the print circuit board due to the package thereof. The light emitting element units constitute a linear light source along this direction, and each light emitting element unit has an increased luminance flux along this direction.

Abstract: A document sheet conveying unit of the invention comprises a casing in which are mounted an active roller, a plurality of idle rollers, and at least a guide element. The idle rollers are mounted in a manner to be respectively in circumferential contact with the active roller. The guide element is mounted proximate to one of the idle rollers, and has a guide surface with a prolonged plane that is tangent with the corresponding idle roller at its contact point with the active roller. The guide surface thereby orients and guides the document sheet to adequately engage through the active roller and corresponding idle roller. Jam of the document sheet is therefore prevented.

Abstract: A document guiding device for a document feeder. The document guiding device mainly comprises an inner wall, an outer wall and a lubricating element. The spatial area between the outer wall and the inner wall form a reversing passageway that accommodates a transiting document. The reversing passageway has a document inlet end and an outlet end both positioned on the same side of the document guiding device. The lubricating element is attached to the interior surface of the outer wall close to the area of contact between the front end of the document and the bend of the outer wall. The lubricating element facilitates the forward movement of the document so that the document is able to travel smoothly from the inlet to the outlet.

Abstract: A sensor for detecting the entrance of a document into a sheet feeder. The document sensor is attached to the sheet feeder. The document sensor comprises a printed circuit board, a key peg and a rocking lever. The printed circuit board is attached to the sheet feeder. The printed circuit board has a first lead wire and a second lead wire detached form each other. The key peg is also attached to the sheet feeder pinning the rocking lever so that the rocking lever is free to rotate relative to the key peg. A conductive member is attached to the rocking lever so that rotating the rocking lever is able to establish an electrical connection between the first lead wire and the second lead wire through the conductive member.

Abstract: A sensor for detecting the entrance of a document into a sheet feeder. The document sensor is attached to the sheet feeder. The document sensor comprises a printed circuit board, a key peg and a rocking lever. The printed circuit board is attached to the sheet feeder. The printed circuit board has a first lead wire and a second lead wire detached form each other. The key peg is also attached to the sheet feeder pinning the rocking lever so that the rocking lever is free to rotate relative to the key peg. A conductive member is attached to the rocking lever so that rotating the rocking lever is able to establish an electrical connection between the first lead wire and the second lead wire through the conductive member.

Abstract: A paper collecting device, comprising a separation roller, a drive roller, a feed roller, a support member, and an elastic member. In addition to the separation having a one-way clutch, the feed roller also has an extra one-way clutch added between the feed gear and the feed rim. When the paper separation process stops and the separation roller instantaneously reverses rotation, the two one-way clutches will disengage and allow the separation roller and feed roller to detach from the driving source of the motor. This will allow the separation roller and feed roller to rotate freely and possess the same tangential velocity to prevent paper from being pushed or pulled causing paper wrinkle or tear. Moreover, the diameter of the feed rim is smaller in design than the separation rim. The paper collecting device also comprising a paper blocking mechanism located on the support member above the frame to prevent paper overly pushed inside.

Abstract: A scanning method in which a scanning head moves back and forth to scan a paper sheet located in a scanning window is disclosed. The method of the present invention includes the steps of a) making the paper sheet go forward a first distance into the scanning window; b) the scanning head scanning a portion of the paper sheet; c) the transmission mechanism driving the scanning head to move a second distance in a first direction, wherein the second distance is smaller than the first distance; d) repeating the steps b) and c) until the scanning head completely scans a plurality of portions of the paper sheet in the scanning region; e) repeating the steps a), b), c) and d), except that the scanning head moves in a second direction opposite to the first; f) repeating the steps a), b), c), d), and e), the movement of the scanning head alternating between a first and second direction, until the scanning head completely scans the paper sheet to be scanned.

Abstract: A friction plate coupling structure inside an automatic document feeder. The friction contact surface of the friction plates is designed to have a slant surface resembling a frustum so that overall contact area is increased and stability of the coupling between the friction plates is improved.

Abstract: A optical device and method for scanner that includes at least a concave mirror, a image device, a stop and a image adjusting module. The concave mirror is with a reflecting surface to focus light and reflect said light to a pre-determined route. The image device can receive the light reflected from at least a concave mirror and convert the light into digital signal. Said stop is on the light traveling route between the image device and at least a concave mirror to reject the extra light. The said image adjusting module is used to adjust the image formed by at least one of the said concave mirrors. The method of adjusting the scanned image will multiply the scanned image by a 2-dimensional enlarging value, said method also cover adjusting the MTF value of the image that near the two ends of the object being scanned.

Abstract: A paper-separating plate is adapted for a paper-separating mechanism having a paper-separating roller. The paper-separating plate placed around a side of the paper-separating roller comprises a main body and a cushion. The main body has a surface and a plurality of grooves and the grooves are positioned on the surface. The cushion is positioned on the surface of the main body and covers the grooves. The cushion positioned over the partial grooves is elastically pressed onto the paper-separating roller. The grooves, neighboring one another or each other, linearly extend in a direction substantially parallel with the axis of the paper-separating roller. Besides, the cushion is made of flexible material and the main body is made of rigid material.

Abstract: A paper collecting device, comprising a separation roller, a drive roller, a feed roller, a support member, and an elastic member. In addition to the separation having a one-way clutch, the feed roller also has an extra one-way clutch added between the feed gear and the feed rim. When the paper separation process stops and the separation roller instantaneously reverses rotation, the two one-way clutches will disengage and allow the separation roller and feed roller to detach from the driving source of the motor. This will allow the separation roller and feed roller to rotate freely and possess the same tangential velocity to prevent paper from being pushed or pulled causing paper wrinkle or tear. Moreover, the diameter of the feed rim is smaller in design than the separation rim. The paper collecting device also comprising a paper blocking mechanism located on the support member above the frame to prevent paper overly pushed inside.

Abstract: The invention is a method to inspect multiple conditions of an auto feeding device feeding standard inspection papers into a scanning device while the said auto feeding device in QC process. The method is to use a bar code printed on the standard inspection paper to recognize the conditions that feeding multiple papers in one time, paper jam, paper inclined, etc. The bar code is continuous and unique, and therefore, the results for which standard inspection paper happened problem and how many more papers needing to be inspected are known immediately.

Abstract: A paper-separating plate is adapted for a paper-separating mechanism having a paper-separating roller. The paper-separating plate placed around a side of the paper-separating roller comprises a main body and a cushion. The main body has a surface and a plurality of grooves and the grooves are positioned on the surface. The cushion is positioned on the surface of the main body and covers the grooves. The cushion positioned over the partial grooves is elastically pressed onto the paper-separating roller. The grooves, neighboring one another or each other, linearly extend in a direction substantially parallel with the axis of the paper-separating roller. Besides, the cushion is made of flexible material and the main body is made of rigid material.