# US 8,787,814 B2 · Image forming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,814 B2 - Document ID: US8787814B2 - Status: Granted - Kind: B2 - Application number: 13/217,584 - Filed: 2011-08-25 - Published: 2012-03-01 - Granted: 2014-07-22 - Earliest claimed: 2010-08-31 - Assignees: Canon Kabushiki Kaisha - Applicants: Yoshitaka Watanabe; Takeji Horie; Shoji Ito - Inventors: Yoshitaka Watanabe; Takeji Horie; Shoji Ito - Web page: https://patentgrep.com/patent/US8787814B2 ## CPC - G03G 15/00: Apparatus for electrographic processes using a charge pattern (G03G16/00, G03G17/00 take precedence) - B41J 29/08: Sound-deadening, or shock-absorbing stands, supports, cases or pads separate from machines - B65H 1/26: with auxiliary supports to facilitate introduction or renewal of the pile - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES ## Abstract A sound insulation member is detachably attached to a bottom of a printer main body to shield a noise in the printer main body. The sound insulation member is detached from the printer main body when an option sheet feeding apparatus is added. When the sound insulation member is not detached from the printer main body in adding the option sheet feeding apparatus, the sound insulation member enters a recess that is provided on an upper surface of the option sheet feeding apparatus. ## Claims ### Claim 1 An image forming apparatus comprising: an image forming apparatus main body; an option sheet feeding apparatus including a sheet cassette that stores sheets and a sheet feeding portion that feeds the sheets stored in the sheet cassette, that is added to a bottom of the image forming apparatus main body; a sound insulation member that is provided between the image forming apparatus main body and a mounting surface on which the image forming apparatus is mounted and which is detachably attached to the bottom of the image forming apparatus main body so as to shield a noise in the image forming apparatus main body when the option sheet feeding apparatus is not added to the image forming apparatus, wherein the sound insulation member is an elongated member that extends substantially along a width of the image forming apparatus main body; and a recess that extends substantially along the width of the image forming apparatus main body and that is provided on an upper surface of the option sheet feeding apparatus so that the sound insulation member can enter the recess when the option sheet feeding apparatus is added to the image forming apparatus in state that the sound insulation member is not detached from the image forming apparatus main body. ### Claim 2 (depends on 1) The image forming apparatus according to claim 1, wherein a sheet cassette is detachably provided in the image forming apparatus main body, and the sound insulation member is detached while the sheet cassette is drawn. ### Claim 3 (depends on 1) The image forming apparatus according to claim 1, wherein the sound insulation member is attached on a bottom of the option sheet feeding apparatus in state that the option sheet feeding apparatus is added to the image forming apparatus main body. ### Claim 4 (depends on 1) The image forming apparatus according to claim 1, further comprising: a detection portion that is provided in the option sheet feeding apparatus to detect presence or absence of the sound insulation member in adding the option sheet feeding apparatus. ### Claim 5 (depends on 4) The image forming apparatus according to claim 4, wherein the detection portion includes a moving member that abuts on the sound insulation member to move when the sound insulation member is not detached, and a signal output portion that outputs a signal indicating that the sound insulation member is not detached in association with the movement of the moving member. ### Claim 6 (depends on 5) The image forming apparatus according to claim 5, wherein the signal output portion is a sensor that detects pass of the sheet of the option sheet feeding apparatus. ### Claim 7 (depends on 4) The image forming apparatus according to claim 4, further comprising: a controlling portion; and an operation portion; wherein the controlling portion controls the operation portion so as to display a message that the sound insulation member remains on the image forming apparatus main body, based on a detection by the detection portion. ### Claim 8 (depends on 1) The image forming apparatus according to claim 1, wherein a projection is provided on the upper surface of the option sheet feeding apparatus so as to enter the bottom of the image forming apparatus main body to shield the noise in the image forming apparatus main body in adding the option sheet feeding apparatus. ### Claim 9 An image forming apparatus comprising: an image forming apparatus main body; an option sheet feeding apparatus including a sheet cassette that stores sheets and a sheet feeding portion that feeds the sheets stored in the sheet cassette, that is added to a bottom of the image forming apparatus main body; a sound insulation member that is provided between the image forming apparatus main body and a mounting surface on which the image forming apparatus is mounted and which is detachably attached to the bottom of the image forming apparatus main body so as to shield a noise in the image forming apparatus main body when the option sheet feeding apparatus is not added to the image forming apparatus; a recess that is provided on an upper surface of the option sheet feeding apparatus, and which is positioned so that the sound insulation member can enter the recess when the option sheet feeding apparatus is added to the image forming apparatus; and a detection portion that is provided in the option sheet feeding apparatus to detect a presence or absence of the sound insulation member in adding the option sheet feeding apparatus. ### Claim 10 (depends on 9) The image forming apparatus according to claim 9, further comprising a controlling portion; and an operation portion; wherein the controlling portion controls the operation portion so as to display a message that the sound insulation member remains on the image forming apparatus main body, based on a detection by the detection portion.