Source: http://www.google.com/patents/US5365665?dq=inassignee:Temic
Timestamp: 2016-10-24 16:30:43
Document Index: 797026264

Matched Legal Cases: ['art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'art 3']

Patent US5365665 - Razor head with flow passages - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe razor head has a plastic housing with a front guardbar, a rear wall, and a blade platform for supporting at least one razor blade. At least two spacers are affixed to the razor blades and are spaced apart to form openings between them. Perforations that are aligned with these openings are provided...http://www.google.com/patents/US5365665?utm_source=gb-gplus-sharePatent US5365665 - Razor head with flow passagesAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS5365665 APublication typeGrantApplication numberUS 08/027,084Publication dateNov 22, 1994Filing dateMar 5, 1993Priority dateMar 6, 1992Fee statusPaidAlso published asDE4303865A1, DE4303865C2, DE9210045U1Publication number027084, 08027084, US 5365665 A, US 5365665A, US-A-5365665, US5365665 A, US5365665AInventorsDave CoffinOriginal AssigneeWarner-Lambert CompanyExport CitationBiBTeX, EndNote, RefManPatent Citations (11), Referenced by (32), Classifications (10), Legal Events (7) External Links: USPTO, USPTO Assignment, EspacenetRazor head with flow passages
US 5365665 AAbstract
The razor head has a plastic housing with a front guardbar, a rear wall, and a blade platform for supporting at least one razor blade. At least two spacers are affixed to the razor blades and are spaced apart to form openings between them. Perforations that are aligned with these openings are provided in the rear wall and/or the blade platform.
1. A razor head for a wet razor, said razor head having at least one razor blade with a cutting edge and comprising:a plastic housing having a front guardbar, a rear wall, and a blade platform for supporting said at least one razor blade; and at least two individual spacers, said individual spacers being affixed to said at least one razor blade and being spaced apart to form openings between them, with perforations being provided in at least one of said rear wall and said blade platform, with said perforations being aligned with said openings between said individual spacers. 2. A razor head according to claim 1, wherein at least one of said spacers is provided with an upwardly extending protrusion that abuts against a rear edge of said at least one razor blade.
3. A razor head according to claim 1, wherein at least one of said spacers is provided with a downwardly extending protrusion that abuts against a rear edge of said at least one razor blade.
4. A razor head according to claim 1, wherein said spacers protrude beyond a back edge of a rearmost one of said razor blades and engage respective recesses in said rear wall of said housing.
5. A razor head according to claim 1, wherein a respective one of said spacers is disposed at each of two ends of said at least one razor blade.
6. A razor head according to claim 5, wherein at least one of said spacers disposed at said ends of said razor blades is provided with at least one protrusion that extends beyond a side edge of said razor blades and engages recess means provided in side walls of said housing.
7. A razor head according to claim 1, wherein said spacers are made of metal.
8. A razor head according to claim 7, wherein said metal is aluminum.
9. A razor head according to claim 1, wherein said spacers are made of plastic.
10. A razor head according to claim 1, wherein said spacers are affixed to said at least one razor blade by means of welding.
11. A razor head according to claim 1, wherein said spacers are affixed to said at least one razor blade by means of gluing.
The present invention relates to a razor head for a wet razor. The razor head is arranged at the front end of a handle and has a single or double razor blade arranged in a plastic housing having perforations and a front guardbar.
In conventional wet razors, a single or double razor blade is permanently embedded in a plastic housing in the razor head. If the razor head is constructed separately from the handle and is fastened to a handle by interlocking elements, the razor head is known as a razor blade unit.
Razor heads commonly have perforations in the plastic housing to allow shaving foam to flow through the plastic housing and to prevent the shaving foam from collecting inside the plastic housing. These perforations also help in efforts to clean the razor head after shaving has been completed.
However, perforations in known razor heads do not operate with complete satisfaction because they do not allow an optimum flow of shaving foam through the razor head during shaving. This has been found to be a particular problem with known razor heads which are razor blade units that are detachable from the razor handle.
Moreover, it is impossible to thoroughly clean known razor heads after shaving. Despite the presence of perforations in conventional plastic housings, soap residue remains trapped within the housing, because shaving foam is not completely rinsed out through the perforations.
It is therefore an object of the present invention to improve the arrangement of the perforations in a razor head, in particular in a razor blade unit of a wet razor.
A further object of the invention is to provide a razor head in which the blades are accurately located.
Further objectives will be apparent from the following description and claims.
To realize these objects, the invention provides a plastic housing having perforations both on the underside and at the rear, with these perforations communicating with an open region of the plastic housing at the cutting edges of the razor blades.
This arrangement provides a razor head with an optimum arrangements of perforations. These perforations proceed from the region of the cutting edges of the razor blades and are continuous through the razor head. Such an arrangement guarantees optimum flow of shaving foam through the razor head and optimizes cleaning efforts by preventing soap residue from gathering inside the plastic housing.
The perforations on the underside of the housing are preferably formed by intermediate spaces between webs which connect a guardbar to the remainder of the plastic housing. In this way, it is possible to create a flow area with an optimum cross-section in the region of the underside perforations.
The guardbar preferably is bevelled backwards along its rear side, starting from its top side. This bevel defines a flow channel running obliquely backwards and downwards.
To prevent shaving foam and soap residue from piling up and collecting in inaccessible crevices, the webs preferably have recesses on a top side in a region behind the guardbar.
In the preferred embodiment, the invention provides a blade block formed from two blades separated by a number of spacers affixed along the length of the blades. Sufficient space is left between the spacers to allow for the passage of shaving debris.
Openings between the spacers are aligned with the perforations in the bottom part at the rear of the plastic housing. In this way, perforations at the rear are created in a simple fashion. Consequently, during shaving, the shaving foam can travel through the gaps between the two razor blades, thus improving the overall shaving properties of the razor.
In such an arrangement, the openings defined by mutually neighboring holes provide an optimum flow cross-section. The webs which connect the front guardbar to the remainder of the plastic housing are located in line with the spacers. This has the advantage of minimizing the resistance to flow caused by the spacers and by the webs.
The spacers are fixed to the blades and have projections at each end which accurately locate the blades with respect to the plastic housing.
To further improve the shaving properties, the razor head is provided with a friction-reducing slide strip. The slide strip is arranged parallel to the cutting edges of the razor blades and formed of water-soluble or water-insoluble polymers.
A razor head according to the invention will now be described in greater detail, by way of example only, with reference to the accompanying drawings, in which:
FIG. 5 is a partial cutaway taken along the line V--V of FIG. 1;
FIG. 6 is a longitudinal section through the spacers of the blade block;
FIG. 7 is an end projection of the blade block; and
FIG. 8 is a transverse cross-section through the blade block.
The razor blade unit 1 includes a plastic housing 2. The plastic housing 2 includes a bottom part 3 and an upper alignment strip 4, which are permanently connected to one another and which locate firmly between themselves a blade block 6 that carries the razor blades 5, 5'. The alignment strip 4 and the bottom part 3 may be connected together by methods such as bonding or ultrasonic welding, or by using frictionally engaged pins and bores.
The bottom part 3 of the plastic housing 2 has spaced integral support webs 8 that extend perpendicular to the longitudinal extent of the cutting edges 9, 9' of the two razor blades 5, 5'. These support webs 8 carry at the front free end a guardbar 10, the front surface of which is rounded off. In this arrangement, the support webs 8 include recesses 11 formed in the region behind the guardbar 10.
Perforations 12 are defined in the regions between mutually neighboring support webs 8 and the guardbar 10 as seen, in particular, in the bottom view in FIG. 2.
A rear wall 13 extends parallel to the guardbar 10. The wall 13 is bevelled downwards towards the center of the housing 2. In this arrangement, recesses are located at the base of the rear wall 13. The recesses are in the form of longitudinal slots 14 which serve to receive the blade block 6. The bottom part 3 of the plastic housing 2 further includes side walls 15.
The support webs 8 of the bottom part 3 of the plastic housing 2 form a blade platform 16 for supporting the blade block 6. As shown in FIGS. 3 and 6 the blade block 6 comprises a number of separate spacers 17, each of which has two flat sides which serve to receive and fasten the two razor blades 5, 5'. The two razor blades 5, 5' are aligned parallel to one another, while the cutting edges 9, 9'are offset with respect to one another. Openings 21 are left free between the spacers 17, which can be made of plastic or metal, such as aluminum.
To assemble the blade block 6 the individual spacers 17 are located in the required positions on the bottom blade and are affixed either by glue or by welding. The top blade is then located and fixed on the top of the spacers. In a preferred embodiment the spacers 17 are provided with protrusions or ridges 27, 28 extending at the rear side and abutting against the rear edge of the upper and lower blades respectively. To assemble the razor blade unit, the blade block 6 is set from above onto the bottom part 3 in such a way that the underside of the lower razor blade 5' rests on the blade platform 16 defined by the support webs 8. Furthermore, the free ends of the spacers 17 may comprise downwardly protruding extensions which are received in the longitudinal slots 14 of the bottom part 3. The blade block 6 is thus fixed on the bottom part 3 of the plastic housing 2. The end spacers are provided with extensions or protrusions 26 that locate in corresponding recesses in the side walls 25 of the alignment strip 4. This location serves to accurately position the blades and therefore the cutting edges 9, 9' with respect to the skin-contacting surfaces of the alignment strip 4 and the plastic housing 2. The precise protrusion of the cutting edges beyond the skin contacting surfaces is essential to the proper functioning and safety of the razor head.
The alignment strip 4 defines a cover cap 22 that rests on the top side of the upper razor blade 5. The rear wall 23 is integrally formed with the cover cap 22. The wall 23 has perforations 24, which are aligned with the openings 21 formed by the spacers 17 and the blades. The alignment strip 4 also has the wings or side walls 25 (FIG. 1) integrally formed on both sides.
To form the complete razor blade unit 1, the alignment strip 4 is fitted onto the bottom part 3 from above. In this process, the rear wall 23 of the alignment strip 4 lies flat on the rear wall 13 of the bottom part 3, and the underside of the wings 25 lie flat on the side walls 15 of the bottom part 3. The alignment strip 4 and the bottom part 3 can then be permanently connected by bonding, ultrasonic welding, or by being frictionally engaging parts.
The cover cap 22 defined by the alignment strip 4 can, in addition, furthermore be provided with a friction-reducing coating.
The individual spacers 17 with the openings 21, which define flow-through channels, permits the production of a narrow blade. The combination of the perforations 24 in the alignment strip 4, the openings 21 and the perforations 12 in the bottom part 3, guarantee a better flow through the housing and an improved and simpler cleaning operation.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3816916 *Oct 3, 1972Jun 18, 1974Warner Lambert CoAdjustable razor blade cartridgeUS3890704 *Jan 14, 1974Jun 24, 1975Warner Lambert CoRazor blade cartridgeUS3935639 *Feb 25, 1974Feb 3, 1976The Gillette CompanySafety razorUS4641429 *Dec 24, 1984Feb 10, 1987Abatemarco Michael RRazor blade cartridge unit with dual bladesUS4852254 *Jun 5, 1987Aug 1, 1989Wilkinson Sword LimitedRazor blade assembly and its method of manufactureUS4970784 *Aug 31, 1989Nov 20, 1990Wilkinson Sword Gesellschaft Mit Beschrankter HaftungRazor with a pivoted detachable blade unitUS5060377 *Aug 15, 1990Oct 29, 1991Wilkinson Sword GmbhShaver head with flow passagesUS5185927 *May 13, 1991Feb 16, 1993Warner-Lambert CompanySegmented guard bar with improved skin flow controlEP0178066A1 *Sep 3, 1985Apr 16, 1986Warner-Lambert CompanyPlastics razor cartridge and razorGB2066132A * Title not availableGB2108033A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6112412 *Apr 21, 1999Sep 5, 2000Warner-Lambert CompanyRazor assembly and cartridge having improved wash-throughUS7100284Dec 11, 2003Sep 5, 2006Knowledge & Merchandising, Inc. Ltd.Shaving productUS7669511Aug 4, 2006Mar 2, 2010Knowledge & Merchandising, Inc. LimitedShaving productUS7748121Jul 6, 2010Eveready Battery Company, Inc.Razor blade and support assemblyUS7992304Feb 14, 2007Aug 9, 2011Kai R&D Center Co., Ltd.RazorUS8046920Feb 14, 2007Nov 1, 2011Kai R&D Center Co., Ltd.RazorUS8104179Feb 14, 2007Jan 31, 2012Kai R&D Center Co., Ltd.RazorUS8209867Aug 17, 2009Jul 3, 2012The Gillette CompanyShaving razors and cartridgesUS8429826May 31, 2012Apr 30, 2013The Gillette CompanyShaving razors and cartridgesUS8438736May 14, 2013The Gillette CompanySafety razor with improved guardUS8528214May 24, 2010Sep 10, 2013Eveready Battery Company, Inc.Razor blade and support assemblyUS8726518Mar 16, 2010May 20, 2014The Gillette CompanyShaving razors and cartridgesUS8782903Feb 26, 2010Jul 22, 2014The Gillette CompanyShaving razor comb guard for a trimming bladeUS20040235182 *Apr 1, 2004Nov 25, 2004Jones Ronald M.Adhered membranes retaining porosity and biological activityUS20040255467 *Jan 27, 2004Dec 23, 2004Eveready Battery Company, Inc.Razor blade platform and razor cartridge using sameUS20050015991 *Apr 2, 2004Jan 27, 2005Eveready Battery Company, Inc.Razor cartridgeUS20050102847 *Dec 11, 2003May 19, 2005King William A.Shaving productUS20050193796 *Mar 4, 2004Sep 8, 2005Heiberger Joseph M.Apparatus for necking a can bodyUS20060248726 *May 6, 2005Nov 9, 2006Eveready Battery Company, Inc.Razor blade and support assemblyUS20070028449 *Aug 4, 2006Feb 8, 2007King William AShaving productUS20090049695 *Aug 24, 2007Feb 26, 2009Andrew Russell KeeneSafety razor with improved guardUS20100083510 *Aug 17, 2009Apr 8, 2010Sean Peter ClarkeShaving Razors and CartridgesUS20100154220 *Feb 14, 2007Jun 24, 2010Kai R&D Center Co., Ltd.RazorUS20100154222 *Feb 14, 2007Jun 24, 2010Kai R&D Center Co.,Ltd.RazorUS20100229397 *Feb 14, 2007Sep 16, 2010Kai R&D Center Co., Ltd.RazorUS20100299928 *Feb 26, 2010Dec 2, 2010Clarke Sean PShaving Razor Comb Guard for a Trimming BladeUS20110225828 *Sep 22, 2011Michael Hal BrunoShaving razors and cartridgesUSD669219 *Oct 16, 2012Kai R&D Center Co., LtdSafety razorEP2730378A2 *Nov 1, 2013May 14, 2014Bob Barker Company, Inc.Razor with Safety Features for Use in a Correctional FacilityEP2730378A3 *Nov 1, 2013Jul 30, 2014Bob Barker Company, Inc.Razor with Safety Features for Use in a Correctional FacilityWO2004069495A1 *Jan 27, 2004Aug 19, 2004Eveready Battery Company, Inc.Razor blade platform and razor cartridge using sameWO2005097433A1 *Mar 30, 2005Oct 20, 2005Eveready Battery Company, Inc.Razor cartridge* Cited by examinerClassifications U.S. Classification30/50, 30/64, 30/41.5, 30/32International ClassificationB26B21/22Cooperative ClassificationB29L2031/7186, B29C66/54, B26B21/222, B29C65/08European ClassificationB26B21/22ALegal EventsDateCodeEventDescriptionMar 5, 1993ASAssignmentOwner name: WILKINSON SWORD GESELLSCHAFT MIT BESCHRANKTER HAFTFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:COFFIN, DAVE;REEL/FRAME:006465/0194Effective date: 19930219Aug 31, 1994ASAssignmentOwner name: WARNER-LAMBERT COMPANY, NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COFFIN, DAVID;REEL/FRAME:007113/0910Effective date: 19940824Jul 28, 1995ASAssignmentOwner name: WARNER-LAMBERT COMPANY, NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WILKINSON SWORD GMBH;REEL/FRAME:007570/0144Effective date: 19950712Apr 30, 1998FPAYFee paymentYear of fee payment: 4Apr 29, 2002FPAYFee paymentYear of fee payment: 8Mar 31, 2004ASAssignmentOwner name: EVEREADY BATTERY COMPANY, INC., MISSOURIFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WARNER-LAMBERT COMPANY LLC;REEL/FRAME:014475/0418Effective date: 20040318May 22, 2006FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services