Source: http://www.google.com/patents/US6885521?dq=7,403,220
Timestamp: 2014-10-26 09:35:03
Document Index: 43449544

Matched Legal Cases: ['art 5', 'art 5', 'art 42', 'art 41', 'art 41', 'art 41', 'arts 41']

Patent US6885521 - Shutter for disc cartridge - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA metal shutter for use with a disc cartridge, has a following structure. A screen portion of the shutter is formed on an outside surface thereof with an indication area. The indication area includes a stamped rough surface part which is configured to constitute a given pattern. The screen portion is...http://www.google.com/patents/US6885521?utm_source=gb-gplus-sharePatent US6885521 - Shutter for disc cartridgeAdvanced Patent SearchPublication numberUS6885521 B2Publication typeGrantApplication numberUS 09/834,812Publication dateApr 26, 2005Filing dateApr 13, 2001Priority dateApr 14, 2000Fee statusLapsedAlso published asCN1324076A, US20020006107Publication number09834812, 834812, US 6885521 B2, US 6885521B2, US-B2-6885521, US6885521 B2, US6885521B2InventorsShuichi KikuchiOriginal AssigneeSony CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (20), Referenced by (2), Classifications (11), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetShutter for disc cartridgeUS 6885521 B2Abstract A metal shutter for use with a disc cartridge, has a following structure. A screen portion of the shutter is formed on an outside surface thereof with an indication area. The indication area includes a stamped rough surface part which is configured to constitute a given pattern. The screen portion is formed, on an inside surface thereof at a portion corresponding to the indication area, with another stamped rough surface area.
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a shutter for a disc cartridge, which is free of the above-mentioned drawbacks.
As is seen from FIG. 2, the larger screen portion 32 has such a length �L1� as to close both the circular opening 6 and the lower open part 5 a of the opening 5, and the smaller screen portion 31 has such a length �L2� as to close the upper open part 5 b of the opening 5. At a leading end of the larger screen portion 32, there is formed a bent back portion 34 which is slidably engaged with the shutter guide 10 which is bolted to the outside surface of the lower shell half 22.
As the metal plate material for producing the shutter 7, a beltlike aluminum plate material or stainless steel plate material having a thickness �T� of about 0.3 mm is used. Preferably, the metal plate material is subjected to anodization treatment or plastic coating before being subjected to the stamping process. By bending a flat piece cut out from the metal plate material, the shutter 7 is produced, as will become apparent as the description proceeds.
As is described hereinabove, preferably, the thickness �T� of the metal plate material for producing the shutter 7 is about 0.3 mm. However, when the above-mentioned production method is employed, much thinner metal plate material can be used. In fact, a metal plate material of the thickness ranging from about 0.15 mm to about 0.5 mm can be used for production of the shutter 7. It has been revealed that if the thickness is greater than 0.5 mm, there is no need of providing the rough inside surface part 42 behind the rough outside surface part 41. That is, in this case, the stress or compression strain produced upon stamping the rough outside surface part 41 is effectively dispersed and absorbed in the direction of the thickness of the metal plate material. It has been further revealed that if the thickness is less than 0.15 mm, satisfied rough outside surface part 41 is not provided. That is, in this case, the stress or compression strain produced upon stamping both the rough outside and inside surface parts 41 and 42 is not effectively dispersed nor adsorbed due to the too thin structure of the metal plate material.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4510546 *May 27, 1982Apr 9, 1985Sony CorporationFlexible magnetic disc cassetteUS5021913 *Apr 24, 1989Jun 4, 1991Overland Bolling CompanyShutter for covering a window opening in a case that contains a flexible diskUS5151894 *Dec 18, 1991Sep 29, 1992Hitachi Maxell, Ltd.Disk cartridge shutterUS5161080 *Oct 30, 1990Nov 3, 1992Sony CorporationReduced friction disc cartridge shutter sirfacesUS5226035 *Apr 11, 1991Jul 6, 1993Sony CorporationDisk cartridge having a shutter with an antistatic coatingUS5308708 *Dec 8, 1992May 3, 1994Kawasaki Steel CorporationCartridge shutter and material for its productionUS5454251 *Jan 26, 1994Oct 3, 1995Sony CorporationMethod of manufacturing a shutter for a disc cartridgeUS5467239 *Jan 6, 1992Nov 14, 1995Sony CorporationDisc cartridge withribbed shutterUS5511405 *May 2, 1994Apr 30, 1996Sony CorporationShutter manufacturing methodUS5512111 *Apr 14, 1994Apr 30, 1996Sumitomo Light Metal Industries, Ltd.Shutter formed of sheet of aluminum alloy containing magnesium with synthetic resin coating of specified thicknessUS5524005 *Mar 8, 1995Jun 4, 1996Tdk CorporationCartridge for a recording reproducing medium having a shutter configured to reduce damage to the casingUS5628114 *Jun 26, 1995May 13, 1997Stern; MelScreen frame and method of manufacture thereofUS5631791 *Feb 22, 1995May 20, 1997Kao CorporationDisk cartridge and method of producing the sameUS5729272 *Jul 31, 1996Mar 17, 1998Sony CorporationThermal transfer printing method and apparatusUS5739993 *Sep 16, 1996Apr 14, 1998Sony CorporationShutter for disk cartridge including integrally formed display surfaceUS5889639 *Feb 7, 1997Mar 30, 1999Imation Corp.Plain carbon steel shutter for removable data storage cartridgesUS5917685 *Oct 21, 1997Jun 29, 1999Sony CorporationShutter guide plate assembly for disc cartridgeUS6069778 *Aug 19, 1998May 30, 2000Sony CorporationMethod of printing on a casing for forming multiple printed layers to provide a protected decorative area and unprotected area on which writing can be formedUS6542459 *May 27, 1999Apr 1, 2003Tdk CorporationCartridge and manufacturing method thereofJPH10162541A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7286322 *Jul 28, 2004Oct 23, 2007Imation Corp.Information field integrally formed by diskette housing to be receptive to handwritten indiciaUS7681212 *Aug 18, 2006Mar 16, 2010Fujifilm CorporationPhotosensitive recording medium cartridge* Cited by examinerClassifications U.S. Classification360/133, G9B/23.046, 720/738, G9B/23.033International ClassificationG11B23/40, G11B23/38, G11B23/03Cooperative ClassificationG11B23/0308, G11B23/0326European ClassificationG11B23/03A4, G11B23/03CLegal EventsDateCodeEventDescriptionJun 16, 2009FPExpired due to failure to pay maintenance feeEffective date: 20090426Apr 26, 2009LAPSLapse for failure to pay maintenance feesNov 3, 2008REMIMaintenance fee reminder mailedJul 20, 2001ASAssignmentOwner name: SONY CORPORATION, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIKUCHI, SHUICHI;REEL/FRAME:011995/0212Effective date: 20010622Owner name: SONY CORPORATION 7-35 KITASHINAGAWA 6-CHOME SHINAGFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIKUCHI, SHUICHI /AR;REEL/FRAME:011995/0212RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google