公开(公告)号：US12025926B2

公开(公告)日：2024-07-02

申请号：US18299241

申请日：2023-04-12

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yasuhiro Miyahara ,  Shigeo Kuroda ,  Matsutaka Maeda ,  Yuji Kitano ,  Makoto Souma ,  Yutaro Yoshida

IPC: G03G15/20

CPC classification number: G03G15/2057 ,  G03G15/206 ,  G03G15/2064 ,  G03G2215/2051 ,  G03G2215/2054

Abstract: An electrophotographic member having an endless shape comprises: a substrate; and an elastic layer on an outer peripheral surface thereof. The elastic layer contains a silicone rubber and metal silicon fillers dispersed in the silicone rubber. An average of area ratios of the metal silicon fillers in respective first binarized images is 42% or less, and an average of area ratios of the metal silicon fillers in respective second binarized images is 42% or less. The elastic layer has λ of 1.30 W/(m·K) or more, where λ is a thermal conductivity of the elastic layer in a thickness direction thereof, and the elastic layer has ρV of 9.0 LOG Ω·cm or more, where ρV is a common logarithm value of a volume resistivity thereof.

公开(公告)号：US11841630B2

公开(公告)日：2023-12-12

申请号：US18066426

申请日：2022-12-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yuji Kitano ,  Matsutaka Maeda ,  Makoto Souma ,  Yutaro Yoshida ,  Yasuhiro Miyahara ,  Shigeo Kuroda

IPC: G03G15/20

CPC classification number: G03G15/2057

Abstract: A fixing member includes a substrate having an endless shape; and an elastic layer on an outer peripheral surface of the substrate, the elastic layer containing a silicone rubber and fillers dispersed in the silicone rubber, a content of the fillers with respect to the elastic layer being 35 vol % or more and 50 vol % or less. The fillers includes at least a first filler and a second filler. The first filler is at least one selected from the group consisting of: magnesium oxide; and zinc oxide. The second filler is at least one selected from the group consisting of metal silicon and silicon carbide. A proportion of a sum of the first filler and the second filler to a total amount of the fillers in the elastic layer is 90 vol % or more. Further, the average of 6 sets of representative coefficient A is 1.4 or more.

公开(公告)号：US11573515B2

公开(公告)日：2023-02-07

申请号：US17717368

申请日：2022-04-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yasuhiro Miyahara ,  Matsutaka Maeda ,  Yuji Kitano ,  Makoto Souma ,  Yutaro Yoshida ,  Shigeo Kuroda

IPC: G03G15/20

Abstract: A fixing member for electrophotography having an endless shape has a base layer having an endless shape, and an elastic layer on the outer circumferential surface of the base layer. The elastic layer includes a silicone rubber and a filler dispersed in the silicone rubber. The total amount of the filler compounded in the elastic layer is 30 vol % or less based on the total volume of the elastic layer. The elastic layer satisfies the relation of λtd>λmd>λnd. λtd is a thermal conductivity of the elastic layer in the circumferential direction, λnd is a thermal conductivity of the elastic layer in the thickness direction, and λmd, is a thermal conductivity of the elastic layer in the longitudinal direction. λtd is 2.0 W/(m·K) or more, and λnd is 1.3 W/(m·K) or more.

公开(公告)号：US11829102B2

公开(公告)日：2023-11-28

申请号：US17344871

申请日：2021-06-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Daisuke Yamashita ,  Yuichi Mizo ,  Junichi Tamura ,  Ran Wakayama ,  Yutaro Yoshida

IPC: G03G9/08 ,  B07B11/06 ,  B07B7/083

CPC classification number: G03G9/0817 ,  B07B11/06 ,  B07B7/083

Abstract: Toner classification apparatus comprising classification rotor comprising a plurality of vanes extending from rotation center side of classification rotor to outer circumference side of classification rotor; the plurality of vanes are disposed with prescribed gaps established between vanes; gaps form opening facing rotation center region of classification rotor; each of vanes is disposed such that portion of vane away from of center of rotation of classification rotor is located on more upstream side in a direction of rotation of classification rotor than portion of vane closer to center of rotation of classification rotor; each of vanes has elbow; and in a horizontal cross section provided by sectioning classification rotor in a rotational axis perpendicular direction of classification rotor, shape of vane satisfies prescribed formulae, as well as toner production method comprising classification step of carrying out classification process on particles to be classified by using toner classification apparatus.

公开(公告)号：US20220334522A1

公开(公告)日：2022-10-20

申请号：US17717368

申请日：2022-04-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yasuhiro Miyahara ,  Matsutaka Maeda ,  Yuji Kitano ,  Makoto Souma ,  Yutaro Yoshida ,  Shigeo Kuroda

IPC: G03G15/20

Abstract: A fixing member for electrophotography having an endless shape has a base layer having an endless shape, and an elastic layer on the outer circumferential surface of the base layer. The elastic layer includes a silicone rubber and a filler dispersed in the silicone rubber. The total amount of the filler compounded in the elastic layer is 30 vol % or less based on the total volume of the elastic layer. The elastic layer satisfies the relation of λtd>λmd>λnd. λtd is a thermal conductivity of the elastic layer in the circumferential direction, λnd is a thermal conductivity of the elastic layer in the thickness direction, and λmd, is a thermal conductivity of the elastic layer in the longitudinal direction. λtd is 2.0 W/(m·K) or more, and λnd is 1.3 W/(m·K) or more.