摘要:
In the developing apparatus (1) including a developing bath (2) and a toner transport pipe (3) for supplying toner to the developing bath (2), a toner supply portion opening/closing mechanism is provided, that includes a shutter member for opening and closing a toner supply port of the toner transport pipe (3) that is contained in a base portion (12) of the toner transport pipe (3), a shaft (30) for moving the shutter member back and forth in a longitudinal direction of the developing bath (2), a second spring member (33) provided such that the shaft (30) is inserted therein, a first spring member (26) for supporting the shaft (30) detachably to the shutter member (20) through its extension and contraction, and a lever member (25) for extending and contracting the first spring member (26) through its releasing and closing.
摘要:
A developer cartridge (60) capable of being fitted to the toner replenishing opening of a developer storage hopper (50) has a sealing member (63) for sealing the toner therein that is bonded with an adhesive (62) etc., to the rim of its replenishing opening (61) to be opposed to the opening of the developer storage hopper (50). The bottom face of this developer cartridge (60) which constitutes the bottom for supporting the toner charged therein is inclined upwards in the stripping direction of the sealing member (63), whereby the charged amount of the toner at the stripping start of the sealing member (63) is regulated when the sealing member (63) is stripped so that the toner can be uniformly charged across the full length of the developer storage hopper (50) with respect to the stripping direction of the sealing member (63).
摘要:
For realizing a satisfactory and stable developing process, the charge state of a developer and the density of toner particles contained in the developer is kept constant in the developing process. A developing roller (4) to be driven rotationally is provided in a developing tank (3) containing a developer. The developer is sucked magnetically using the magnetic force of a magnet (4b) provided in a developing sleeve (4a) composing the developing roller (4). The developer is then fed into a developing area opposed to a photosensitive member (1), then collected into the developing tank (3) after the developing process is ended. The magnet (4b) is composed of an odd number of magnetic poles; developing pole (N1), feeding pole (S1), magnetic force distribution adjusting pole (N2), developer sucking pole (S2), developer separating pole (S3), auxiliary collecting pole (N3), and collecting pole (S4). Between the sucking pole (S2) and the developing pole (N1), an even number of poles are disposed. Between the developing pole (N1) and the separating pole (S3) are disposed an even number of poles. Consequently, the developer used for visualizing an image is separated while it is stuck on the developing sleeve when the developer is separated at the separating pole (S3). When the developer is replaced, sticking of toner on the developing sleeve can be reduced significantly. In addition, the supplied developer is fixed in both toner density and charging level at the developing pole (N1) in developing.
摘要:
The invention is characterized by efficiently and quickly loosening an aggregation of toner material formed in a toner cartridge. A toner cartridge (1) has an L-shaped toner agitating member (4) disposed in a main body (1a) thereof having a discharge port (3) for feeding toner at the front surface (2) of the main body (1a). Since the toner agitating member (4) is supported so as to pivot like a conical pendulum, a support pin (6) fixed to a bottom surface (5) of the main body (1a) passes through a through hole (42) having a greater diameter than that of the support pin (6). The support pin (6) has an engagement portion (7) attached thereto for prevention of disengagement of the toner agitating member (4) therefrom. A plate-like portion of the toner agitating member (4) defines an agitating plate (43), a distal end of which extends toward the discharge port (3) of the main body (1a). Shaking the toner cartridge (1) causes the agitating member (4) to rotate about the support pin (6) and to pivot in a direction parallel to the axis of the support pin (6) like a conical pendulum, thereby efficiently loosening the aggregated toner material.
摘要:
In the developing apparatus (1) including a developing bath (2) and a toner transport pipe (3) for supplying toner to the developing bath (2), a toner supply portion opening/closing mechanism is provided, that includes a shutter member for opening and closing a toner supply port of the toner transport pipe (3) that is contained in a base portion (12) of the toner transport pipe (3), a shaft (30) for moving the shutter member back and forth in a longitudinal direction of the developing bath (2), a second spring member (33) provided such that the shaft (30) is inserted therein, a first spring member (26) for supporting the shaft (30) detachably to the shutter member (20) through its extension and contraction, and a lever member (25) for extending and contracting the first spring member (26) through its releasing and closing.
摘要:
For realizing a satisfactory and stable developing process, the charge state of a developer and the density of toner particles contained in the developer is kept constant in the developing process. A developing roller (4) to be driven rotationally is provided in a developing tank (3) containing a developer. The developer is sucked magnetically using the magnetic force of a magnet (4b) provided in a developing sleeve (4a) composing the developing roller (4). The developer is then fed into a developing area opposed to a photosensitive member (1), then collected into the developing tank (3) after the developing process is ended. The magnet (4b) is composed of an odd number of magnetic poles; developing pole (N1), feeding pole (S1), magnetic force distribution adjusting pole (N2), developer sucking pole (S2), developer separating pole (S3), auxiliary collecting pole (N3), and collecting pole (S4). Between the sucking pole (S2) and the developing pole (N1), an even number of poles are disposed. Between the developing pole (N1) and the separating pole (S3) are disposed an even number of poles. Consequently, the developer used for visualizing an image is separated while it is stuck on the developing sleeve when the developer is separated at the separating pole (S3). When the developer is replaced, sticking of toner on the developing sleeve can be reduced significantly. In addition, the supplied developer is fixed in both toner density and charging level at the developing pole (N1) in developing.