摘要:
A method for cleaning a photoreceptor of an image forming apparatus comprises the steps of actuating cleaning means of a cleaning system (8) and rotating the photoreceptor (1) before a usual image forming operation, after a predetermined time charging a particular area of the photosensitive drum (1), causing residual toner adhering to a sealing member (10d) of a developing unit to attract to the charged area, carrying the attracted residual toner with rotation of the photoreceptor to the cleaning means of the cleaning device (8), and removing the residual toner by the cleaning means. Accordingly, the present invention eliminates the possibility of mixing of colour of previously used toner into a toner image after replacement of a developing unit by another unit containing different colour of toner.
摘要:
An electrostatic copying apparatus comprising - a transparent plate -on which to place a document to be copied, - an optical system - for projecting the image of the document onto an electrostatographic photosensitive member in an exposure zone located along the moving path of the photosensitive member, and -a driving means - for reciprocating one of at least a part of the optical system and the transparent plate is characterized in that -said driving means includes - a backward movement restricting means - for stopping the backward movement of said one of at least a part of the optical system and the transparent plate fully accurately at a predetermined forward movement start position.
摘要:
@ A developing device comprising a developer receptacle for storing a two-component developer composed of carrier particles and toner particles, a magnetic brush mechanism (36) disposed in a front portion within the developer receptacle, a first agitating mechanism (38) disposed in a rear portion within the developer (14) receptacle in a spaced-apart relationship to the magnetic brush mechanism (36), a second agitating mechanism (40) disposed in proximity to, and rearwardly or downwardly of, the magnetic brush mechanism, a developer removing -member (50) disposed between the magnetic brush mechanism (36) and the first agitating mechanism (38) with its front edge being in contact with, or in proximity to, the surface of the magnetic brush mechanism (36), and a toner particle supplier (32) for supplying toner particles to the developer receptacle; is characterized in that a plurality of cuts (54) spaced in the widthwise direction are formed at least in the front portion of the developer removing member (50), and a part of the developer held on the surface of the magnetic brush mechanism (36) is removed therefrom by the action of the developer removing member (50) and caused to flow over the upper surface of the developer removing member (50) toward the first agitating mechanism (38) but the remainder of the developer held on the surface of the magnetic brush mechanism (36) moves through the cuts without undergoing the action of the developer removing member and is caused to flow toward the second agitating mechanism (40).
摘要:
A power transmitting device especially suitable for use in photocopying machines includes a driving shaft (38) and a driven shaft (29). When locking members (37, 32) on the respective shafts are axially disengaged from each other, the driven shaft (29) and the driving shaft (38) are rotatively displaced with respect to each other by a predetermined angle so that the locking members may be freely and positively locked when the driving shaft and driven shaft are axially reengaged.
摘要:
The housing (1) of a delivery unit (A) is engaged with a predetermined part of the body (B) of an image forming apparatus, the housing (1) being removable from the body (B). An endless belt (2) mounted on the housing (1) is wound on a pair of pulleys (4), (6). One of the pulleys (4),(6) has a first shaft (5) secured to the housing (1), while the other pulley (4) has a second shaft (3) diametrically movable with respect to the housing (1). The second shaft (3) is attached to the body (B) with the endless belt (2) stretched to restrain the housing (1) from being removed from the body (B). The second shaft (3) is removable from the body (B). The delivery unit (A) is attached without use of screws. Accordingly, the delivery unit (A) may be readily attached to the body (B) with no possibility of the photoreceptor being damaged. In an image forming apparatus having electric component elements disposed under the delivery unit (A), the maintenance of the elements can be facilitated.
摘要:
A method for cleaning a photoreceptor of an image forming apparatus comprises the steps of actuating cleaning means of a cleaning system (8) and rotating the photoreceptor (1) before a usual image forming operation, after a predetermined time charging a particular area of the photosensitive drum (1), causing residual toner adhering to a sealing member (10d) of a developing unit to attract to the charged area, carrying the attracted residual toner with rotation of the photoreceptor to the cleaning means of the cleaning device (8), and removing the residual toner by the cleaning means. Accordingly, the present invention eliminates the possibility of mixing of colour of previously used toner into a toner image after replacement of a developing unit by another unit containing different colour of toner.