Abstract: A sheet member discharge mechanism comprising an upper discharge roller and a lower discharge roller for conveying a sheet member in a predetermined direction while nipping it therebetween. A push-down member is disposed downstream of the nipping portion between the upper discharge roller and the lower discharge roller as viewed in a direction of conveying the sheet member, the push-down member being allowed to move between an ascended position and a descended position and is urged to the descended position. The push-down member is moved to the ascended position by the sheet member acting upon the push-down member while the sheet member is being conveyed by the upper discharge roller and the lower discharge roller that work in cooperation. The push-down member moves to the descended position to push down the trailing edge of the sheet member after the trailing edge of the sheet member has passed the nipping portion between the upper discharge roller and the lower discharge roller.

Abstract: In the present invention, a staple processing section for collectively stapling a predetermined number of paper sheets, on which an image have been fixed, is contained in a main body housing containing an image forming section, a transfer section, a fixing section, and a conveying path. The staple processing section is integrated with a main body of an image forming apparatus, so that the degree of freedom of design of the paper conveying path is increased, the appearance of the main body of the image forming apparatus can neatly be designed.

Abstract: A document separating mechanism for an automatic document feeder for separating and feeding the bottommost document of documents laid on document bearing means. A separating roller mechanism has a plurality of rollers provided at spaced locations in an axial direction, and a separating belt mechanism is disposed opposite and above the separating roller mechanism. The separating belt mechanism is composed of a driving roller and a driven roller disposed in parallel at spaced locations, a wide separating belt looped over the driving roller and the driven roller and pressed against the separating roller, and a tension imparting mechanism for exerting tension on the separating belt.

Abstract: The present invention provides a microphone in which a first acoustic capacity for mainly determining resonance frequency and a second acoustic capacity for mainly determining resonance sharpness are defined in a resonance portion, said first acoustic capacity and said second acoustic capacity being arranged in parallel in a direction of crossing relative to a moving direction of a sound wave, said second acoustic capacity capable of being communicated with only said first acoustic capacity to control resonance frequency.

Abstract: A microphone in which a diaphragm which is vibrated by a sound wave received, and a conversion portion such as a magnetic circuit for electrically acting on the diaphragm to convert the vibration into an electric signal are incorporated into a unit case, wherein a first elastic body and a second elastic body are arranged on the upper surface and the lower surface, respectively, of an peripheral edge portion of the diaphragm, the diaphragm is mounted on the unit case through the first elastic body on the upper surface of the peripheral edge portion thereof, and one end side of the conversion portion is placed in contact with the second elastic body arranged on the lower surface of the peripheral edge portion of diaphragm to encase the conversion portion into the unit case.

Abstract: A microphone in which stopper means are provided between the mike grip side and the microphone unit assembly side. The stopper means maintain the non-contact state with each other when the microphone receives no shock, and come in contact with each other, when the microphone receives shock, with the movement of the microphone unit assembly in the axial direction of the mike grip caused by the shock to prevent the further movement of the microphone unit assembly.

Abstract: A conveying belt mechanism for an automatic document feeder, for conveying a document placed on a document bearing plate to a document exposure position on a transparent platen. The conveying belt mechanism includes a driving roller and a driven roller disposed above the transparent platen, with a predetermined spacing provided between the two rollers in a document feeding direction, an endless conveying belt looped over the driving roller and the driven roller, pressing rollers disposed between the driving roller and the driven roller for pressing the endless conveying belt against the transparent platen, and belt guides mounted at both ends of the driven roller.

Abstract: An automatic document feeder for sending a document from a document setting position on a document bearing plate to a document feeding path and returning the document onto the document bearing plate after feeding of the document along the document feeding path. A document mover includes a moving plate for moving the document that has been returned to the document bearing plate to the document setting position. A document presser presses the document that has been moved by the document mover to the document setting position. A controller controls the operation of the document presser and the document mover. The controller operates the moving plate of the document mover to move the document that has been returned to the document bearing plate to the document setting position, then operates the document presser to press the document that has been moved to the document setting position, and causes the moving plate of the document mover to recede, while maintaining the document in a pressed state.

Abstract: An automatic document feeder includes first and second registration rollers for abutting the leading end of an original conveyed along a conveying path against their contact positions. The first registration roller is included in a plurality of reversing rollers arranged apart from each other along an axis of a supporting shaft of each of the reversing rollers. The reversing roller turn over the original along a reversing path that bypasses a part of the conveying path. There is provided a reversal guiding member arranged so as to cover a region between the adjacent reversing rollers. The reversal guiding member has guide surfaces curved along the peripheral surfaces of the reversing rollers as viewed along the axis of the supporting shaft. The reversal of the original is guided along the reversing path by the guide surfaces.

Abstract: An automatic document feeder of a type having a document inverting mechanism beside a document sending-in path is disclosed which, when a document located at a document exposure position is to be inverted, operates a conveying belt mechanism in a predetermined direction to convey the document by a predetermined amount in a direction away from a document positioning member, then brings a document positioning member to a retreat position, and then operates the conveying belt mechanism in a direction opposite to the predetermined direction to convey the document to the document inverting mechanism.

Abstract: An automatic document feeder conveys an original along a conveying path to an original reading section in an image processor. First and second registration rollers for abutting the conveyed original against their contact portions, and a guide plate for guiding the conveyance of the original to the registration rollers are arranged in the conveying path. The first registration roller includes a plurality of reversing rollers made of rubber for reversing the original along a reversing path, and the reversing rollers are arranged a predetermined distance away from each other along an axis of their supporting shaft. A side edge in the direction of conveyance of the guide plate is in such a comb shape that projections and non-projections are alternatively formed. Each of the projections is opposite to a region between the adjacent reversing rollers, and extends toward the downstream side of the contact portions in the direction of conveyance.

Abstract: A recycle document feeder according to the present invention includes a pair of document width regulating guides (9a, 9b) for guiding opposite edges of document originals (D) fed back onto a document placing plate (8) for alignment thereof with respect to the width thereof. With this construction, if the document width regulating guides (9a, 9b) each had a small length (A) as measured along a document transportation direction, the document originals (D) fed back onto the document placing plate (8) could not properly be aligned by the document width regulating guides (9a, 9b) thereby to be randomly stacked on the skew with respect to the document transportation direction.

Abstract: A document feeder which includes a separator mechanism having a first separator member and a second separator member for separating and feeding document originals one by one into a document transportation path. The first separator member is provided in a main body, and the second separator member is provided in a cover which covers a portion of the main body and is adapted to be pivotally opened. With the cover being closed, the second separator member is positioned with respect to the first separator member by a positioning mechanism.

Abstract: A document feeder which has a document transportation path curved with a curvature radius such that a document original is reversed and fed therethrough to a document setting surface. The document feeder further includes a pair of rollers respectively disposed inside and outside of the curvature of the document transportation path in an opposed relation and adapted to hold the document original therebetween for guiding the document original to the document setting surface. The rollers abut against each other in a position upstream of the vertex of the curvature of the document transportation path with respect to a document transportation direction.

Abstract: A recycle document feeder according to the present invention includes a cover (251) covering a document discharge portion (30). The cover (251) is openably supported by a pivot shaft (256) between a pair of frames (255). A feed-back path (32) for guiding a document original onto a document placing plate is defined by a pair of guide members (257, 258) provided in an opposed relation. The upper guide member (258) is attached to the interior face of the cover (251). A switch claw (253) for switching the document traveling direction is attached to the pivot shaft (256) which supports the cover (251). Thus, there is no need for additionally providing a shaft for supporting the switch claw (253), thereby simplifying the construction of the document discharge portion (30).

Abstract: This invention relates to a document transport device for use in an image forming apparatus. The document transport device has a first belt roller disposed above a document positioning member. A second belt roller is disposed away from the first belt roller in the document transport direction. An endless belt is wound around the first and second belt rollers. Plural presser rollers are arranged on a specified position between the first and second belt rollers to press the belt against a contact glass. The document transport device has a tension roller between the first belt roller and the presser roller closest thereto to apply a tension force to the belt so as to set the belt at the lowermost position of the tension roller below a common tangential line to the circumferences of the first belt roller and the presser roller and apart from the contact glass.

Abstract: A document feeder having a cover covering a portion of a main body and adapted to be pivotally opened, and a pair of document transportation rollers provided in an abutting relation in the midst of a document transportation path for transportation of a document original. A document guiding member for guiding the document original to an abutment position of the pair of rollers is attached to the cover.

Abstract: An automatic document feeder according to the present invention is mountable on a copying machine. The automatic document feeder mounted on the copying machine is displaceable to a closed state and an open state with respect to the copying machine. In the closed state, originals can be automatically set on the copying machine by the automatic document feeder. When the originals are manually set on the copying machine, the automatic document feeder is brought into the open state. A tray 11 provided in the automatic document feeder is divided into a main tray 61 and a sub tray 62. The main tray 61 and the sub tray 62 are so connected to each other that their connected state is changeable to an extending state or a contracted state. When the automatic document feeder is brought into the open state, the connected state between the main tray 61 and the sub tray 62 is automatically brought into the contracted state.

Abstract: In an automatic document feeder, an original tray has an original platen on its upper surface. Originals put on the original platen are fed along a conveying path by conveying rollers and conveyance auxiliary rollers. The originals fed are separated one at a time by separating belts and separating rollers which are arranged above and below a conveying path. When a conveyance guide plate constituting a part of the original platen is removed upward, the separating rollers, the conveying rollers, and the conveyance auxiliary rollers and a portion for supporting the rollers are exposed upward, so that maintenance such as replacement of components such as the separating rollers, the conveying rollers and the conveyance auxiliary rollers can be performed.

Abstract: An automatic document feeder 1 automatically operates a tray depending on the operating conditions of the automatic document feeder. The automatic document feeder 1 has a set surface 7 on which originals to be conveyed are to be set. An original receiving tray 11 for receiving discharged originals is provided in the vicinity of an original discharge port 10. A lower end of the original receiving tray 11 is rotatable, and a tray driving device is connected to the back of the original receiving tray 11. The tray driving device rotates and displaces the original receiving tray 11 around the lower end depending on the operating conditions of the automatic document feeder 1. The original receiving tray 11 is raised almost perpendicularly until the originals are set on the set surface 7 (see FIGS. 4A and 4D). When the originals are conveyed, the original receiving tray 11 is rotated to an obliquely laid state (see FIGS. 4B and 4C) in order to receive the paper sheets discharged from the discharge port 10.