摘要:
In order to enhance magnetic characteristic to realize a stabilized pivotal movement of an armature and to obtain magnetic characteristic required for high-speed printing, an armature according to the present invention has a magnetic circuit forming member formed by laminating plural plates to be provided on an arm, that supports a printing wire, for forming a magnetic circuit.
摘要:
A wire dot printer head including a yoke, cores arranged in an annular form on the yoke, coils combined with the cores so as to fit the cores, armatures supported so as to be raised or lowered in respect to the cores, wires supported at the free ends of the armatures in such a way that they may be driven and displaced, and an extremity end guide having guide holes for independently and slidably supporting the extremity ends of the wires to arrange them. When the moving direction of the wire dot printer head is as a main scanning direction, the guide holes of the extremity end guide are arranged along an arc curved only in direction of the sub-scanning direction so as to cause the arrangement positions in the main scanning direction to be made different.
摘要:
A wire dot printer head of the present invention is provided with an abrasion preventive member in a yoke. The abrasion preventive member encloses the outer periphery of the armature support shafts. The yoke, together with an armature spacer having a plurality of cutouts for holding the armature support shafts, holds the armature support shafts. The armature support shafts do not directly contact the yoke because of the use of the abrasion preventive member. It is therefore possible to restrain abrasion of the yoke surface and accordingly to prevent deterioration in printing quality.
摘要:
A sheet folding apparatus including a sheet supporting member which has an inclined surface to support a stack of sheets, a sheet position adjuster which adjusts a position of the stack of sheets along the inclined surface, a sheet pressing unit which presses the stack of sheets against the inclined surface, a folding unit which folds the stack of sheets pressed by the sheet pressing unit, and a controller which controls the sheet pressing unit to press the stack of sheets on the sheet position adjuster against the inclined surface, and to create a gap between the stack of sheets on the sheet position adjuster and the sheet pressing unit to receive a sheet onto the sheet position adjuster.
摘要:
A sheet folding apparatus includes an adjuster which supports a stack of sheets stacked on an inclined surface of a sheet path and adjusts a position of the stack of sheets along the inclined surface, a stapler which staples the stack of sheets set at a stapling position, a folding unit which folds the stack of sheets set at a folding position, and a guide provided between the stapler and the folding unit. The stapler ejects a staple from a staple surface by sinking from the inclined surface. The folding unit includes folding rollers and a folding blade which inserts the stack of sheets into a nip between the folding rollers. The guide includes a loading surface offset from the staple surface and an uprising member which is disposed on a part of the loading surface to keep the stack of sheets symmetric with respect to the folding rollers.
摘要:
A sheet post-processing apparatus discharges and conveys a sheet from a process tray to a storage tray, and decelerates a bundle hook and a paper discharge roller when the bundle hook reaches a discharge start position of a bundle of sheets. At this time, a tangential speed of the paper discharge roller is faster than a movement speed of the bundle hook. Subsequently, the sheet post-processing apparatus stops the paper discharge roller in accordance with a rotation position of the bundle hook, and then decelerates the movement speed of the bundle hook. After the sheets are stacked on the storage tray, the bundle hook accelerates to return to a home position. Additionally, the sheet post-processing apparatus includes a spool 17 having a sheet pressing guide member 16 with a bent portion 16A. When the sheets are conveyed to a process tray 13, the spool 17 is rotated forward to longitudinally align the sheets and then is backwardly rotated to press the sheets using elastic force of the sheet pressing guide member 16, thereby preventing a gap from occurring between the sheets or preventing the sheets from being misaligned.
摘要:
A sheet processing apparatus comprises a processing tray for loading a sheet bundle, a first conveying unit having a rotary shaft which is installed at least at the end on the downstream side in the direction for moving the sheet bundle on the processing tray and is driven to rotate via a first drive source and a drive unit and a roller installed on the rotary shaft for loading and conveying the sheet bundle and discharging the sheet bundle from the end on the downstream side and from the processing tray, and a second conveying unit having a pair of pulleys having at least one of them installed rotatably on the rotary shaft on the downstream side driven to rotate via a second drive source and a drive unit, a belt stretched over the pair of pulleys, and an arm installed on the belt for hooking an end of the sheet bundle on the processing tray, conveying it together with the roller, and discharging the sheet bundle from the end on the downstream side and from the processing tray. The arm of the second conveying unit synchronizes the speed when moving along the straight portion of the belt with the rotational speed of the roller of the first conveying unit and changes the speed when moving in the peripheral direction of the pulley on the downstream side among the pair of pulleys from the rotational speed of the roller.
摘要:
A sheet post-processing apparatus includes a processing tray and a stapler. The processing tray has a mounting area, a flexible portion, and an edge holding part. A sheaf of sheets is made on the processing tray. A sheet P to be stapled is stacked on the mounting area. The flexible portion is formed integrally with the mounting area and at the same level as the upper surface of the mounting area, along the edge of the mounting area of the side to staple the sheaf of sheets, and is bent easier than the mounting area in the direction of the thickness of the sheaf of sheets toward the mounting area. The stapler has a fixed part and an arm, and staples a sheaf of sheets. The fixed part is provided deviated from the upper surface of the mounting area to the mounting unit.
摘要:
A post-processing apparatus has a standby tray to receive a paper sheet to be supplied from a digital copier, a processing tray to receive a paper sheet dropped from a standby tray, and a stapler to staple the rear end aligned on the processing tray. When a first paper sheet is supplied to the standby tray, the standby tray roller is brought into contact with the paper sheet and rotated reversely, the paper sheet is returned a little, and the rear end of the paper sheet is placed at the holding position on the tab. Then, the press member presses the rear end of the paper sheet, to receive a second paper sheet.
摘要:
A sheet finishing apparatus of the present invention takes in sheets of paper ejected from an image forming apparatus through a taking-in port and clamping and conveying the sheets of paper by a pair of pinch rollers for post processing, has a sheet guidance member which supports one of the pair of pinch rollers and can rotate between a first position where the one pinch roller and the other pinch roller make contact with each other and a second position where the one pinch roller is released from the other pinch roller, and furthermore includes a tray for loading the sheets of paper conveyed by the pair of pinch rollers and an assist arm which is attached rotatably to the sheet guidance member and when the one pinch roller and the other pinch roller are in contact with each other, is projected in the direction for pressing the sheets of paper in the tray and when the one pinch roller is released from the other pinch roller, is rotated in the opposite direction.