US 12,032,318 B2
Electrophotographic image forming system with cleaning blade
Taiki Amemiya, Hachioji (JP); Kazutoshi Kobayashi, Hachioji (JP); Yukio Hosoya, Tama (JP); Seijiro Takahashi, Kokubunji (JP); Tomoko Sakimura, Hino (JP); and Kazukuni Nishimura, Hino (JP)
Assigned to KONICA MINOLTA, INC., Tokyo (JP)
Filed by KONICA MINOLTA, INC., Tokyo (JP)
Filed on Dec. 12, 2022, as Appl. No. 18/064,490.
Claims priority of application No. 2021-202148 (JP), filed on Dec. 14, 2021.
Prior Publication US 2023/0185227 A1, Jun. 15, 2023
Int. Cl. G03G 15/00 (2006.01); G03G 5/06 (2006.01); G03G 5/07 (2006.01); G03G 5/147 (2006.01); G03G 8/00 (2006.01); G03G 21/00 (2006.01)
CPC G03G 15/6597 (2013.01) [G03G 5/06147 (2020.05); G03G 5/061473 (2020.05); G03G 5/0732 (2020.05); G03G 5/14786 (2013.01); G03G 5/14791 (2013.01); G03G 5/14795 (2013.01); G03G 8/00 (2013.01); G03G 15/751 (2013.01); G03G 21/0011 (2013.01); G03G 2215/00518 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electrophotographic image forming system that forms an electrostatic latent image on at least a photoreceptor, develops an image using an electrostatic charge image developing toner, and removes the electrostatic charge image developing toner using a cleaning blade, a tip ridge of the cleaning blade being pressed against a surface of the photoreceptor, the electrophotographic image forming system comprising:
a photoreceptor including a photosensitive layer,
a surface protecting layer that is provided on a surface of the photosensitive layer,
wherein the surface protecting layer includes a polymerizable monomer having at least two polymerizable groups in a molecule and a polymer of a hole transporting compound having a polymerizable group represented by General formula (1) below, and
the tip ridge of the cleaning blade has an edge angle that is obtuse and less than 120° and is pressed against the surface of the photoreceptor at an effective contact angle that is in a range of 8° to 20°

OG Complex Work Unit Chemistry
in General formula (1), Ar1 and Ar2 each represent a linking group represented by a structural formula (7) below; Ar5 represents a group represented by a structural formula (8) or a structural formula (9) below; the total number of D that is a sum of c1, c2, and c5 is 1 or 2 when Ar5 is represented by the structural formula (8); the total number of D is 1 when Ar5 is represented by the structural formula (9); D is represented by —(—(CH2)d—(O—(CH2)f—)e—O—CO—C(CH3)═CH2) or —(—(CH2)d—(O—(CH2)f—)e—O—CO—CH═CH2); d and f each independently represent an integer of 0 to 5; e represents 0 or 1; and c1, c2, and c5 each independently represent 0, 1, or 2,

OG Complex Work Unit Chemistry
in the structural formulas (7), (8), and (9), R5 and R6 each independently represent one selected from a group consisting of a hydrogen atom, an alkyl group containing 1 to 4 carbon atoms, a phenyl group substituted with an alkoxy group having 1 to 4 carbon atoms, an unsubstituted phenyl group, an aralkyl group having 7 to 10 carbon atoms, and a halogen atom; t represents an integer of 1 to 3; and two of R6 may be optionally bonded together so that the structural formula (9) forms a cyclic structure.