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US3851697A
Expired / Lapsed
US
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Method and apparatus for finishing pneumatic tires
Assignee: Bridgestone Corp
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Filing: 1972-05-30
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Granted: 1974-12-03
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Expires: 1992-05-30
Abstract
Abstract A method and an apparatus for finishing pneumatic tires in which a comblike blade supported on a swingable holder is brought into slight contact with one shoulder of a tread of a rotating tire at a certain angle and then moved in a direction at right angles to the rotating axis of the tire and a pair of comblike blades supported on respective swingable holders are brought into slight contact with the sides of the rotating tire and then moved toward each other to cause the comblike blades to sweep over the sectional profiles in a tangential direction, thereby trimming spew pips on the molded and vulcanized tires in succession and automatically detecting difference in sectional profile regardless of sizes and kinds of tires.
Inventors
- 👤 S Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:13
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0633; B29D2030/0634; B29D2030/0635; Y; Y10; Y10T; Y10T82/00; Y10T82/14; Y10T82/149
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
177 words
An apparatus for finishing molded vulcanized pneumatic tires of the type having means for rotating a molded vulcanized rubber tire and at least three rollers supporting and contacting a tread surface of the tire, comprising a frame, a carriage movably mounted to said frame, a first comblike blade pivotally mounted on said carriage, first moving means to move said carriage mounted to said frame, said first moving means being adapted to vertically move said carriage so that siad first comblike blade is in contact with a tread surface of the tire in a plane including its vertical diameter and rotating axis of the tire, two side carriages movably mounted to said frame, positioned on each side of the tire, a second moving means to move said side carriages mounted to said frame, a second comblike blade pivotally mounted on each of said side carriages, said second moving means adapted to move said side carriages toward and away from each other and vertically in unison so that said second comblike blades may contact the sides of the tire.
Claim 2
Independent Claim
177 words
An apparatus for finishing molded vulcanized pneumatic tires of the type having means for rotating a molded vulcanized rubber tire and at least three rollers supporting and contacting a tread surface of the tire, comprising a frame, a carriage movably mounted to said frame, a first comblike blade pivotally mounted on said carriage, first moving means to move said carriage mounted to said frame, said first moving means being adapted to vertically move said carriage so that siad first comblike blade is in contact with a tread surface of the tire in a plane including its vertical diameter and rotating axis of the tire, two side carriages movably mounted to said frame, positioned on each side of the tire, a second moving means to move said side carriages mounted to said frame, a second comblike blade pivotally mounted on each of said side carriages, said second moving means adapted to move said side carriages toward and away from each other and vertically in unison so that said second comblike blades may contact the sides of the tire.
Claim 3
Dependent Claim
53 words
An apparatus for finishing pneumatic tires according to claim 1 wherein said apparatus includes means for detecting a loading of the tire in the apparatus, said detecting means being mounted to said frame and means for detecting a difference in the size of tires, said size detection means being mounted to said frame.
Claim 4
Dependent Claim
21 words
An apparatus for finishing pneumatic tires according to claim 2, wherein said detecting means and size detection means are photoelectric tubes.
Claim 5
Dependent Claim
39 words
An apparatus for finishing pneumatic tires according to claim 1 wherein said apparatus includes means for controlling the ends of said second comblike blades relative to the sides of the tire, said control means being mounted to said frame.
Claim 6
Dependent Claim
18 words
An apparatus for finishing pneumatic tires according to claim 4, wherein said control means is a photo-electric tube.
Claim 7
Dependent Claim
39 words
An apparatus for finishing pneumatic tires according to claim 1, including means for controlling raising movements of said side carriages to bring ends of said two comblike blades in contact with shoulders of the tire to trim the tire.
Claim 8
Dependent Claim
73 words
An apparatus for finishing pneumatic tires according to claim 1, wherein said first moving means comprises a pair of opposing angle plates mounted to said frame, a pair of guide rods, and a feed screw secured to and extending between said angle plates, said carriage being movably mounted on said guide rods and feed screw and being adapted to be raised and lowered by means of said feed screw along said guide rods.
Claim 9
Dependent Claim
87 words
An apparatus for finishing pneumatic tires according to claim 1 wherein said second moving means comprises a pair of second opposing angle plates mounted to said frame, a second feed screw and second pair of guide rods secured to and extending between said second angle plates, said second feed screw being formed in respective half lengths with right and left hand screw threads, said side carriages being adapted to be moved toward and away from the tire to be trimmed by rotation of said second feed screw.
Claim 10
Dependent Claim
57 words
An apparatus for finishing pneumatic tires according to claim 8, wherein said side carriages are substantially in symmetry, a swingable holder pivotally mounted on each of said side carriages, the second comblike blade being carried on each said swingable holder, counterbalance means normally biasiNg said second comblike blade into slight contact with the side of the tire.
Claim 11
Dependent Claim
63 words
An apparatus for finishing pneumatic tires according to claim 9, wherein said counterbalance means comprises a pulley mounted to said frame, a wire secured to said swingable holder and a counterbalance weight, said wire extending around said pulley with said counterbalance weight causing tensile force in said wire, which force is exerted on said swingable holder to pivotally move it toward the tire.
Claim 12
Dependent Claim
98 words
An apparatus for finishing pneumatic tires as set forth in claim 9, wherein each of said side carriages includes a first stopper means adapted to abut against said swingable holder at an instant when each of the carriages reaches the furthermost position from the other to keep each respective second comblike blade in substantially upstanding position to permit a tire to be introduced without any interference with the second comblike blades, and a second stopper on said carriage adapted to determine an initial contact angle of each said second comblike blade with the side surface of the tire.
Claim 13
Dependent Claim
91 words
An apparatus for finishing pneumatic tires according to claim 1, wherein said second moving means further comprise lifter means secured to said frame and connected to said side carriages, said lifter means comprising a pair of guide rods and a screw shaft mounted to said frame, a lifting carriage having nut means secured thereto slidably mounted on said guide rods, said nut means being threadably engaged with said screw shaft and, support arms secured to said lifting carriage, said support arms projecting from the lifting carriage to support said side carriages.
Claim 14
Dependent Claim
76 words
An apparatus for finishing pneumatic tires according to claim 1, wherein the first comblike blade comprises a body defining a flat bottom surface adapted to be in contact with and sweep over the tread of the tire, a ground surface slightly inclined away from the alignment of the bottom surface, and V-shaped groove bottoms forming a number of sharp cutting edges in a row at the boundary lines of the ground surface and the groove bottoms.
Claim 15
Dependent Claim
58 words
An apparatus for finishing pneumatic tires according to claim 13, wherein the effective length of each of the cutting edges of said first comblike blade is longer than twice the maximum width of the tire to be trimmed and the minimum height of the cutting edges over the tread of the tire is approximately one to 2 millimeters.
Claim 16
Dependent Claim
61 words
An apparatus for finishing penumatic tires according to claim 6, wherein a bottom of each said blade is rounded off on one side adjacent to a tire in a curvature of a relatively large diameter and defines a plurality of cutting edges, several of said cutting edges being aligned adjacent to one end of the blade and arranged in an arc.
Claim 17
Dependent Claim
33 words
An apparatus for finishing pneumatic tires according to claim 8, wherein said side carriages are provided with swingable holders connected thereto by Z-shaped fixtures whereby the tire trimming may be performed more effectively.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |