US 11,897,279 B2
Envelope processing apparatus and image forming system
Shingo Yoshizawa, Kanagawa (JP); Michitaka Suzuki, Kanagawa (JP); Nobuyoshi Suzuki, Tokyo (JP); Yuusuke Shibasaki, Tokyo (JP); Shinji Asami, Tokyo (JP); Takahiro Matsuda, Kanagawa (JP); Kazuyoshi Matsuo, Miyagi (JP); Makoto Hidaka, Tokyo (JP); Akira Kunieda, Tokyo (JP); Takahiro Watanabe, Kanagawa (JP); and Takuya Morinaga, Tokyo (JP)
Assigned to RICOH COMPANY, LTD., Tokyo (JP)
Filed by Shingo Yoshizawa, Kanagawa (JP); Michitaka Suzuki, Kanagawa (JP); Nobuyoshi Suzuki, Tokyo (JP); Yuusuke Shibasaki, Tokyo (JP); Shinji Asami, Tokyo (JP); Takahiro Matsuda, Kanagawa (JP); Kazuyoshi Matsuo, Miyagi (JP); Makoto Hidaka, Tokyo (JP); Akira Kunieda, Tokyo (JP); Takahiro Watanabe, Kanagawa (JP); and Takuya Morinaga, Tokyo (JP)
Filed on Apr. 15, 2022, as Appl. No. 17/721,516.
Claims priority of application No. 2021-080485 (JP), filed on May 11, 2021; and application No. 2022-034516 (JP), filed on Mar. 7, 2022.
Prior Publication US 2022/0363088 A1, Nov. 17, 2022
Int. Cl. B43M 3/04 (2006.01); B43M 5/04 (2006.01); G03G 15/00 (2006.01)
CPC B43M 3/045 (2013.01) [B43M 5/042 (2013.01); G03G 15/6582 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An envelope processing apparatus for enclosing an enclosure into an envelope conveyed to an enclosing position, the envelope processing apparatus comprising:
a conveyance roller configured to convey the envelope to the enclosing position;
a first envelope length calculator configured to,
calculate a first envelope length of the envelope in an envelope conveyance direction in which the envelope is conveyed in a close state in which a flap of the envelope closes;
a flap opener configured to open the flap while the conveyance roller conveys the envelope;
a second envelope length calculator configured to calculate a second envelope length of the envelope in the envelope conveyance direction in an open state in which the flap opens;
a first envelope detector configured to detect a leading end of the envelope in the envelope conveyance direction at a first detection time and detect a trailing end of the envelope in the envelope conveyance direction in the close state at the second detection time;
a second envelope detector configured to detect the leading end of the envelope in the envelope conveyance direction at a third detection time and detect the trailing end of the envelope in the envelope conveyance direction in the open state at a fourth detection time;
the first envelope length calculator is further configured to calculate the first envelope length based on a time difference between the first detection time and the second detection time and a conveyance speed of the envelope at which the envelope is conveyed;
the second envelope length calculator is further configured to calculate the second envelope length based on a time difference between the third detection time and the fourth detection time and the conveyance speed of the envelope; and
a controller configured to,
calculate a flap length of the flap in the envelope conveyance direction based on the first envelope length and the second envelope length,
control enclosing of the enclosure into the envelope based on the flap length, and
control the conveyance roller to interrupt conveyance of the envelope at the enclosing position.