Source: http://www.google.com/patents/US4155687?ie=ISO-8859-1
Timestamp: 2014-07-11 14:58:35
Document Index: 38125196

Matched Legal Cases: ['art 3', 'arts 2', 'art 3', 'art 4', 'arts 3', 'art 3', 'art 3']

Patent US4155687 - Apparatus for molding tires with a reinforcement below the tread surface - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsAn apparatus for molding tires with a reinforcement below the tread surface comprises a support, a multi-part mold including an inner core, upper and lower mold parts coaxial with the core and respectively abutting against opposite ends of the latter and a plurality of mold segments arranged about the...http://www.google.com/patents/US4155687?utm_source=gb-gplus-sharePatent US4155687 - Apparatus for molding tires with a reinforcement below the tread surfaceAdvanced Patent SearchPublication numberUS4155687 APublication typeGrantApplication numberUS 05/925,463Publication dateMay 22, 1979Filing dateJul 17, 1978Priority dateJul 15, 1977Also published asCA1116359A1, DE2820762A1, DE2820762B2, DE2820762C3Publication number05925463, 925463, US 4155687 A, US 4155687A, US-A-4155687, US4155687 A, US4155687AInventorsErich GrunnerOriginal AssigneeErich GrunnerExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (3), Classifications (17) External Links: USPTO, USPTO Assignment, EspacenetApparatus for molding tires with a reinforcement below the tread surfaceUS 4155687 AAbstract An apparatus for molding tires with a reinforcement below the tread surface comprises a support, a multi-part mold including an inner core, upper and lower mold parts coaxial with the core and respectively abutting against opposite ends of the latter and a plurality of mold segments arranged about the core and movable with respect thereto between an open and a closed position engaging in the latter position said upper and lower mold parts, a plurality of gripper arms mounted circumferentially spaced from each other on said support about the mold and having free ends on which grippers, preferably in the form of magnets, are provided for releasably holding annular reinforcements and for introducing the reinforcements into the mold while the mold segments are in the open position, and holders on the mold segments for holding the reinforcements introduced into the molds in fixed position during molding of the tire while said gripper arms are withdrawn.
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims: 1. In an apparatus for molding tires for motor vehicles in which the tires are provided with reinforcements at the tread surface, a combination comprising support means; multi-part mold means mounted on said support means and comprising an inner core having an axis and opposite ends, a pair of end mold parts arranged coaxial with said core at opposite ends of the latter and a plurality of mold segments arranged about said core for forming the region inwardly of the tread surface of the tire and being movable toward and away from the core between an open and a closed position engaging said end mold parts; means for moving an annular reinforcement into said mold means while said segments are in the open position; and means on said mold means for holding a reinforcement introduced into said mold means in a fixed position relative thereto.
BACKGROUND OF THE INVENTION The present invention relates to an apparatus for molding tires for motor vehicles in which the tires are provided with annular reinforcements located below the tread surface of the tire. Such an apparatus includes a mold comprising an inner core, an upper and a lower mold end part arranged coaxial with the core and engaging respectively upper and lower portions of the latter as well as a plurality of segments for forming the region of the tread surface of the tire and arranged about the core radially spaced from the latter, whereby such segments are movable in radial and/or axial direction toward and away from the core.
SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for molding tires of motor vehicles in which the tire is provided with a tread surface reinforcement insert and in which an exact position and maintenance of such a position of the reinforcement insert is maintained until the tread surface region of the tire is molded.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-section through a mold and showing also the device for introducing a reinforcement for the tread surface on the tire to be molded;
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically illustrates a cross-section through a multi-part mold 1 as well as a device 7 for introducing an annular reinforcing insert 10 into the mold 1. The mold 1 comprises a core 2, an upper and a lower mold end part 3, respectively 4, coaxially arranged with the core 2 and respectively abutting against upper and lower ends of the central core 2. The mold parts 2, 3 and 4 are held in abutting relationship on a central support 6 with at least the upper mold part 3 removable in axial direction from the core 2 and the latter removable in axial direction from the lower mold part 4. The simplified mold shown in FIG. 1 illustrates also some of the outer mold segments 5 for forming the region inwardly of the tread surface of the tire to be molded and which are movable in a manner as will be described later on toward and away from the core 2 and the upper and lower mold parts 3 and 4. The device 7 for introducing an annular reinforcing insert 10 into the mold, while the segments 5 are moved to an open position, comprises a plurality of gripper arms or gripper rods 8 forming piston rods of fluid-operated cylinder-and-piston means 12 circumferentially spaced from each other about the support 6 and connected thereto in the manner shown in FIG. 1. The gripper arms or gripper rods 8 carry at the upper ends grippers 9, preferably formed by electromagnets, which may be energized and deenergized in a known manner, not shown in the drawing. The annular reinforcement 10 formed by wires of ferromagnetic material is held by the gripper magnets 9 when the latter are energized and is placed on the magnets 9 while the upper mold end part 3 is removed and the segments 5 are in the open position to then be moved by the gripper arms 8 to the horizontal center plane of the mold 1. Thereafter the upper mold end part 3 is closed as well as part of the segments 5 are brought to the closed position as schematically indicated in FIG. 2 and at least these segments are provided with holding means 11 in form of magnets which hold the reinforcement 10 in the position at which they are introduced by the electromagnets 9 on the free ends of the gripper arms 8. After the reinforcement 10 is held in place by the magnets 11 on the segments 5, the electromagnets 9 on the gripper arms 8 are deenergized and the gripper arms 8 are withdrawn by the cylinder-and-piston means 12 to a starting position below the mold 1, whereafter the remaining segments 5' are brought to the closed position.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2770013 *Feb 28, 1951Nov 13, 1956Lloyd L FelkerStud holders for use in tire moldsUS2808621 *Nov 17, 1951Oct 8, 1957Goodyear Tire & RubberMethod of and apparatus for manufacturing anti-skid tiresUS3381736 *Feb 23, 1966May 7, 1968Dunlop Rubber CoTireUS3461502 *Oct 18, 1965Aug 19, 1969Amk Subsidiary CorpTire curing pressUS3551957 *Nov 5, 1968Jan 5, 1971Stubbe FriedrichMethod and apparatus for molding ice skatesUS3910748 *Apr 15, 1974Oct 7, 1975Turner Mfg CoPlastic mold constructionUS4043725 *Sep 30, 1976Aug 23, 1977Oskar SchmidtApparatus for molding pneumatic vehicular tiresUS4059375 *Mar 30, 1976Nov 22, 1977Sopecom S.A. FribourgVehicle wheel pneumatic tires and the manufacture thereof* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS4541795 *Jul 31, 1984Sep 17, 1985James R. GoldbergInjection mold for a bottle closure deviceUS8608467 *May 4, 2010Dec 17, 2013Rademaker B.V.Device and method for twisting elongated dough stripsUS20100297319 *May 4, 2010Nov 25, 2010Rademaker B.V.Device and method for twisting elongated dough strips* Cited by examinerClassifications U.S. Classification425/3, 425/542, 425/577, 425/129.1International ClassificationB29K105/22, B29K21/00, B29L30/00, B29C67/00, B29D30/06, B29D30/08, B29C45/26, B29C45/14Cooperative ClassificationB29D30/0661, B29C45/1459, B29D30/06European ClassificationB29C45/14J, B29D30/06RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google