Image forming apparatus

A facsimile apparatus, comprising:

• an electrophotographic apparatus and a receiving means for receiving image data from a remote terminal, wherein said electrophotographic apparatus comprises:
• an image-bearing member for bearing a latent image, and a developing apparatus for developing the latent image, the developing apparatus comprising:
• a developer container for containing a developer, wherein the developer comprises a magnetic toner comprising a binder resin composition and a magnetic material having a bulk density of 0.35 g/ml or higher, said magnetic material being contained in a proportion of 10-70 wt. % of the magnetic toner, said binder resin composition containing 10-70 wt. % of THF (tetrahydrofuran)-insoluble component and the remainder of a THF-soluble component including a component with a molecular weight of 10000 or below on a GPC (gel permeation chromatography) chromatogram of the THF-soluble component constituting 10-50 wt. % of the binder resin;
• a developer-carrying member for carrying and conveying the developer contained in the developer container to a developing zone opposite the image-bearing member, the developer-carrying member comprising a developing sleeve enclosing a magnet;
• and
• an elastic blade which flexibly presses against the developer-carrying member to regulate the developer carried and conveyed on the developer-carrying member to a prescribed thickness to form a thin developer layer on the developer-carrying member.

An apparatus unit, comprising:

• an image-bearing member for bearing a latent image, and a developing apparatus for developing the latent image, the developing apparatus comprising:
• a developer container for containing a developer, wherein the developer comprises a magnetic toner comprising a binder resin composition and a magnetic material having a bulk density of 0.35 g/ml or higher, said magnetic material being contained in a proportion of 10-70 wt. % of the magnetic toner, said binder resin composition containing 10-70 wt. % of THF (tetrahydrofuran)-insoluble component and the remainder of a THF-soluble component including a component with a molecular weight of 10000 or below on a GPC (gel permeation chromatography) chromatogram of the THF-soluble component constituting 10-50 wt. % of the binder resin;
• a developer-carrying member for carrying and conveying the developer contained in the developer container to a developing zone opposite the image-bearing member, the developer-carrying member comprising a developing sleeve enclosing a magnet, and
• an elastic blade which flexibly presses against the developer-carrying member to regulate the developer carried and conveyed on the developer-carrying member to a prescribed thickness to form a thin developer layer on the developer-carrying member.
• wherein said developing apparatus is supported integrally together with the image-bearing member to form a single unit, which can be connected to or released from an apparatus body as desired.

A developer apparatus comprising:

• a developer container for containing a developer, wherein the developer comprises a magnetic toner comprising a binder resin composition and a magnetic material having a bulk density of 0.35 g/ml or higher, said magnetic material being contained in a proportion of 10-70 wt. % of the magnetic toner, said binder resin composition containing 10-70 wt. % of THF (tetrahydrofuran)-insoluble component and the remainder of a THF-soluble component including a component with a molecular weight of 10,000 or below on a GPC (gel permeation chromatography) chromatogram of the THF-soluble component constituting 10-50 wt. % of the binder resin;
• a developer-carrying member for carrying and conveying the developer contained in the developer container to a developing zone, the developer-carrying member comprising a developing sleeve enclosing a magnet;
• and
• a developer layer thickness regulating member which elastically presses against the developer-carrying member to regulate the developer carried and conveyed on the developer-carrying member to a prescribed thickness to form a thin developer layer on the developer-carrying member.

An apparatus unit comprising:

• an image bearing member for bearing a latent image, and a developing apparatus for developing the latent image, the developing apparatus comprising:
• a developer container for containing a developer, wherein the developer comprises a magnetic toner comprising a binder resin composition and a magnetic material having a bulk density of 0.35 g/ml or higher, said magnetic material being contained in a proportion of 10-70 wt. % of the magnetic toner, said binder resin composition containing 10-70 wt. % of a THF (tetrahydrofuran)-insoluble component and the remainder of a THF-soluble component including a component with a molecular weight of 10,000 or below on a GPC (gel permeation chromatography) chromatogram of the THF-soluble component constituting 10-50 wt. % of the binder resin;
• a developer-carrying member for carrying and conveying the developer contained in the developer container to a developing zone, the developer-carrying member comprising a developing sleeve enclosing a magnet;
• and
• a developer layer thickness regulating member which elastically presses against the developer-carrying member to regulate the developer carried and conveyed on the developer-carrying member to a prescribed thickness to form a thin developer layer on the developer-carrying member,
• wherein said developing apparatus is supported integrally together with the image-bearing member to form a single unit, which can be connected to or released from an apparatus body as desired.