Log in
E-mail
Password
Remember
Forgot password ?
Become a member for free
Sign up
Sign up
Settings
Settings
Dynamic quotes 
OFFON

4-Traders Homepage  >  News

News

Latest NewsCompaniesMarketsEconomy & ForexCommoditiesInterest RatesHot NewsMost Read NewsRecomm.Business LeadersCalendar 
The feature you requested does not exist. However, we suggest the following feature:

Patent Issued for Image Forming Apparatus Having a Cleaning Member That Controls Rotation Speed According to Sheet Thickness and Number of Sheets...

share with twitter share with LinkedIn share with facebook
share via e-mail
0
02/24/2017 | 06:19pm CET

Patent Issued for Image Forming Apparatus Having a Cleaning Member That Controls Rotation Speed According to Sheet Thickness and Number of Sheets (USPTO 9568861)

By a News Reporter-Staff News Editor at Journal of Engineering -- A patent by the inventors Kitabayashi, Yuta (Osaka, JP); Uno, Koji (Osaka, JP); Uemura, Satoshi (Osaka, JP), filed on April 14, 2015, was published online on February 14, 2017, according to news reporting originating from Alexandria, Virginia, by VerticalNews correspondents.

Patent number 9568861 is assigned to KYOCERA Document Solutions Inc. (Osaka, JP).

The following quote was obtained by the news editors from the background information supplied by the inventors: "The present disclosure relates to an image forming apparatus including a cleaning device cleaning a toner remained on an intermediate transferring belt used for intermediate transfer of a toner image.

"An image forming apparatus, such as a copying machine or a printer, forming an image onto a sheet by electrographic manner carries out development by using a toner. To an electrostatic latent image formed on an image carrier, such as a photosensitive drum, the toner is supplied from a developing device and a toner image is developed. The toner image is transferred onto a sheet as a recording medium. The sheet having the toner image transferred is heated and pressured by a fixing device. Thereby, the toner image is fixed onto the sheet and the image is formed on the sheet. Thus, a series of image forming operation is completed.

"As a manner transferring the toner image onto the sheet, there are a dynamic transferring manner and an intermediate transferring manner. The dynamic transferring manner is a manner transferring dynamically the toner image, which is formed onto the photosensitive drum as a transferring body, onto the sheet. On the other hand, the intermediate transferring manner is a manner transferring (first-transferring) once the toner image, which is formed onto the photosensitive drum, onto the intermediate transferring belt and then transferring (second-transferring) the toner image onto the sheet. In any transferring manner, if the toner scattering to the transferring body and non-transferred toner are remained, quality of the formed image is degraded. Therefore, the image forming apparatus includes a cleaning device removing the remained toner from the transferring body.

"The cleaning device included in the intermediate transferring type image forming apparatus rotates a fur brush roller having bias applied, thereby removing the toner remained on the intermediate transferring belt by physical scraping force and electrostatic force of the fur brush roller. The removed toner is moved to an electrically charged collecting roller coming into contact with the fur brash roller and being rotated. The moved toner is stripped by a blade coming into contact with the collecting roller and collected into a waste toner box.

"In such a cleaning device, in a case where a quantity of the toner adhered on the fur brush roller is large or a case where a charged amount of the toner is small, the toner is accumulated on the fur brush roller. If the toner accumulated on the fur brush roller is increased, a phenomenon where an unnecessary toner is moved from the fur brush roller to the intermediate transferring belt in reverse is caused. By adhering of the unnecessary toner onto the intermediate transferring belt, the toner image transferred onto the sheet is soiled by the unnecessary toner. If the soiled toner image is fixed onto the sheet, a problem that quality of the formed image is degraded is caused.

"As a conventional technique for this problem, there is a way removing the remained toner from the intermediate transferring belt by heightening rotational speed of the fur brush roller in a case where the toner image with high concentration is formed onto the intermediate transferring belt.

"In a case where the sheet which the toner image is transferred is thick, in order to heat the sheet to temperature where the fixing device can fix the toner image, the fixing device conveys the sheet at speed slower than usual. In this case, traveling speed of the intermediate transferring belt at an upstream side of the fixing belt is lowered, too. When a difference between relative speeds of the intermediate transferring belt and fur brash roller becomes large, the intermediate transferring belt is damaged by the fur brash roller. In order to prevent the intermediate transferring belt from being damaged, the rotational speed of the fur brush roller is lowered, too. If the rotational speed of the fur roller brush is lowered, centrifugal force of the fur brush roller is weakened, movement of the toner to the collecting roller is stagnated and collecting capacity is deteriorated. As a result, a quantity of the toner accumulated in the fur brush roller is increased.

"In a case where transferring of the toner image onto the thick sheet is carried out successively or a case where the number of transferring the toner image onto the thick sheet is larger than the number of transferring the toner image onto the sheet with usual thickness, if the transferring onto the sheet with usual thickness is carried out after the transferring onto the thick sheet, the following problem is caused. That is, when the toner image is transferred onto the sheet with usual thickness, the speed of each component, such as the intermediate transferring belt, is returned to original speed. In such a case, when the fur brush roller is rotated at usual speed, the centrifugal force becomes stronger than that at low speed. The toner accumulated excessively in the fur brush roller may be discharged to the intermediate transferring belt before the toner is collected by the collecting roller. The toner image is transferred onto the intermediate transferring belt soiled by the discharged toner. In such a case, a problem that the quality of the image formed onto the sheet is degraded is caused.

"Moreover, in a conventional technique, the rotational speed of the fur brush roller during cleaning is determined regardless of a frictional wear state of the fur brush roller rubbed to the intermediate transferring belt and collecting roller. Therefore, new problems that frictional wear of the fur brush roller is progressed and the toner is moved from the fur brush roller to the intermediate transferring belt in reverse are caused."

In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "In accordance with an embodiment of the present disclosure, an image forming apparatus includes an image carrier, a cleaning member, a rotation controlling part, a first obtaining part and a mode changing part. The image carrier is arranged rotatably and has a surface to carry a toner image transferred onto a sheet. The cleaning member rotates with coming into contact with the surface of the image carrier at a downstream side in a rotating direction of the image carrier from a transferring position transferring the toner image to collect a toner from the image carrier and to hold the toner. The rotation controlling part has a first speed control mode rotating the cleaning member at a first rotational speed according to a thickness of the sheet when the toner image is transferred onto the sheet and a second speed control mode rotating the cleaning member at a second rotational speed faster than the first rotational speed and switches from the first speed control mode to the second speed control mode at predetermined switch timing. The first obtaining part obtains a first transferring number indicating the number of sheets having a thickness equal to or more than a first threshold determined in advance among sheets to be subjected to transferring of the toner image. The mode changing part changes the switching timing in accordance with the first transfer number.

"In accordance with another embodiment of the present disclosure, an image forming apparatus includes an image carrier, a cleaning member, a deciding part and a rotation controlling part. The image carrier is arranged rotatably and has a surface to carry a toner image transferred onto a transferred medium. The cleaning member rotates with coming into contact with the surface of the image carrier at a downstream side in a rotating direction from a transferring position transferring the toner image onto the transferred medium to collect a toner from the image carrier and to hold the toner. The deciding part decides a wear amount of the cleaning member due to contact. The rotation controlling part changes rotational speed of the cleaning member in accordance with the wear amount decided by the deciding part.

"The above and other objects, features, and advantages of the present disclosure will become more apparent from the following description when taken in conjunction with the accompanying drawings in which a preferred embodiment of the present disclosure is shown by way of illustrative example."

URL and more information on this patent, see: Kitabayashi, Yuta; Uno, Koji; Uemura, Satoshi. Image Forming Apparatus Having a Cleaning Member That Controls Rotation Speed According to Sheet Thickness and Number of Sheets. U.S. Patent Number 9568861, filed April 14, 2015, and published online on February 14, 2017. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9568861.PN.&OS=PN/9568861RS=PN/9568861

Keywords for this news article include: KYOCERA Document Solutions Inc.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2017, NewsRx LLC

(c) 2017 NewsRx LLC, source Science Newsletters

share with twitter share with LinkedIn share with facebook
share via e-mail
0
Latest news
Date Title
06:19p TRAVELZOO : Announces Share Repurchase Program
06:19p DEVON ENERGY : Reports Fourth-Quarter and Full-Year 2016 Results; Provides Updated Capital and Production Outlook
06:19p Patent Issued for Image Forming Apparatus Having a Cleaning Member That Controls Rotation Speed According to Sheet Thickness and Number of Sheets...
06:19p ++ 'We can remain minority shareholder,' Vivendi CEO says ++
06:19p LONDON MARKET CLOSE : FTSE 100 Dragged Down By Banks And Miners
06:19p WEISSLAW LLP : FBR & Co. Acquisition May Not Be in the Best Interests of FBRC Shareholders
06:18p New Findings Reported from C.C. Enweremadu and Co-Authors Describe Advances in Bioenergy [Performance Characteristics of Green Diesel from Marula...
06:18p NUFLARE TECHNOLOGY : Patent Issued for Multi Charged Particle Beam Writing Method and Multi Charged Particle Beam Writing Apparatus (USPTO 9570267)
06:18p VIVENDI : ++ 'No charges against top managers,' Vivendi says ++
06:18p SUMITOMO RUBBER INDUSTRIES : Patent Issued for Rubber Extrusion Device (USPTO 9566737)
Latest news
Advertisement
Hot News 
-5.77%Property website Rightmove generates fewer client leads in 2016
-3.94%VIVENDI : Shares Hit Hard by Fall in Profit -- 2nd Update
-4.70%Baidu posts bleak fourth quarter, but sees business reshuffle driving 2017 growth
-8.89%J.C. Penney holiday quarter sales drop, to shut 130-140 stores
-3.32%JUPITER FUND MANAGEMENT : full-year profits hit by rising costs
Most Read News
02:58a SAMSUNG ELECTRONICS : tightens donation rules; report says two group executives offer to quit
02/23 Exclusive - Trump says Republican border tax could boost U.S. jobs
08:33a GM DEMANDS NON-COMPETE CLAUSES IN RETURN FOR OPEL PATENTS : Spiegel
02/23 Safran rejects TCI Fund Management's criticism of Zodiac Aero bid
11:33a DAIMLER : Aston Martin's losses accelerate, new DB11 brings year-end surge to sales
Most recommended articles
02/23DJVIVENDI : Full-Year Earnings Beat Estimates
12:17pDJLONDON MARKETS : FTSE 100 Ends Lower For 2nd Day As Banks Slide
12:16p EXCLUSIVE : Husky Energy weighs sale of some Eastern Canadian assets - sources
12:14p AIRBUS : says no more cracks found in A400M engines
11:58a WALL STREET STOCK EXCHANGE : Dow on track to break its 10-day record run