# US 11,314,190 B2 · Imaging system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,314,190 B2 - Document ID: US11314190B2 - Status: Granted - Kind: B2 - Application number: 17/254,441 - Filed: 2019-07-01 - Published: 2021-07-22 - Granted: 2022-04-26 - Earliest claimed: 2018-07-31 - Assignees: Hewlett-Packard Development Company, L.P. - Applicants: Hewlett-Packard Development Company, L.P. - Inventors: Yuichiro Tomishima; Hirokazu Yukawa; Sachiyo Yamada - Web page: https://patentgrep.com/patent/US11314190B2 ## CPC - B65H 7/14: by photoelectric feelers or detectors - G03G 15/6594: {characterised by the format or the thickness, e.g. endless forms} - B65H 5/062: {between rollers or balls} - G03G 15/2028: {with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means} - G03G 15/5029: {by measuring the copy material characteristics, e.g. weight, thickness} - G03G 15/65: {Apparatus which relate to the handling of copy material (handling sheets or webs in general B65H; for photographic purposes in general G03B)} - G03G 15/6511: {Feeding devices for picking up or separation of copy sheets} - G03G 15/6585: {by using non-standard toners, e.g. transparent toner, gloss adding devices} - B65H 2404/5392: reflecting particular waves - B65H 2511/13: Thickness - B65H 2513/10: Speed - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An imaging system includes a roller that conveys a printing medium, a medium sensor that detects a medium property of the printing medium conveyed by the roller, and a controller that adjusts a conveyance speed of the printing medium by the roller based on the medium property detected by the medium sensor. ## Claims ### Claim 1 An imaging system comprising: a roller to convey a printing medium; a medium sensor to detect a medium property of the printing medium conveyed by the roller; and a controller to adjust a conveyance speed of the printing medium by the roller based on the medium property detected by the medium sensor, wherein the medium sensor comprises a light emitting portion and a light receiving portion, and wherein the light receiving portion comprises: a convex lens to receive and focus incident light; a diaphragm member provided with an opening located at a focal position of the convex lens to pass the focused incident light; a transparent diffusion member to receive and diffuse the focused incident light received through the opening; and a detector to detect diffused light received from the transparent diffusion member. ### Claim 2 (depends on 1) The imaging system according to claim 1, wherein the medium property comprises a thickness of the printing medium. ### Claim 3 (depends on 1) The imaging system according to claim 1, wherein the medium property comprises glossiness of the printing medium. ### Claim 4 (depends on 1) The imaging system according to claim 1, wherein the light emitting portion is to irradiate light on the printing medium conveyed by the roller and the light receiving portion is to detect the light incident on the printing medium. ### Claim 5 (depends on 4) The imaging system according to claim 4, wherein the light receiving portion is to detect a first part of the light that is transmitted through the printing medium, and wherein the imaging system further comprises a second light receiving portion to detect a second part of the light that is reflected by the printing medium and a third light receiving portion to detect a third part of the light that is diffused and reflected by the printing medium. ### Claim 6 (depends on 5) The imaging system according to claim 5, wherein the second light receiving portion and the third light receiving portion each comprise a same structure as the light receiving portion. ### Claim 7 (depends on 1) The imaging system according to claim 1, wherein the transparent diffusion member comprises a light shielding layer provided with an opening. ### Claim 8 An imaging system comprising: a roller to convey a printing medium; a medium sensor to detect a glossiness of the printing medium conveyed by the roller; and a controller to adjust an operational condition of the roller based on the glossiness detected by the medium sensor, wherein the medium sensor comprises a light emitting portion and a light receiving portion, and wherein the light receiving portion comprises: a lens barrel including a convex lens at a front end; a diaphragm member located inside the lens barrel and having an opening located at a focal position of incident light on the convex lens; a transparent diffusion member located inside the lens barrel to receive and diffuse light passed through the opening; and a detector to detect diffused light received from the transparent diffusion member. ### Claim 9 (depends on 8) The imaging system according to claim 8, wherein the controller is to adjust a conveyance speed of the printing medium by the roller in accordance with the glossiness. ### Claim 10 (depends on 8) The imaging system according to claim 8, wherein the controller is to adjust a contact pressure of the roller with respect to the printing medium in accordance with the glossiness. ### Claim 11 An imaging system comprising: a roller to convey a printing medium; a medium sensor to detect a medium property, the medium sensor comprising a light emitting portion to irradiate light on the printing medium conveyed by the roller and a light receiving portion to detect the light incident on the printing medium; and a controller to adjust an operational condition of the roller based on the medium property detected by the medium sensor, wherein the light receiving portion comprises: a convex lens; an optical member including a diaphragm having an opening located at a center of the diaphragm, the optical member forming a telecentric optical system with the convex lens; a detector to detect light; and a diffusion layer located between the detector and the diaphragm. ### Claim 12 (depends on 11) The imaging system according to claim 11, wherein the medium property comprises a thickness of the printing medium. ### Claim 13 (depends on 11) The imaging system according to claim 11, wherein the medium property comprises a glossiness of the printing medium. ### Claim 14 (depends on 11) The imaging system according to claim 11, wherein the controller is to adjust a conveyance speed of the printing medium by the roller in accordance with the medium property. ### Claim 15 (depends on 11) The imaging system according to claim 11, wherein the diffusion layer comprises: a transparent diffusion member; and a light shielding layer having an opening located at a center of the light shielding layer, the light shielding layer located between the transparent diffusion member and the diaphragm. ### Claim 16 (depends on 11) The imaging system according to claim 11, wherein the diaphragm and the diffusion layer each has a disc shape.