US3789712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for severing tire ply stock and the like
Assignee: NRM Corp
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Filing: 1972-10-16
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Granted: 1974-02-05
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Expires: 1992-10-16
Abstract
Abstract Apparatus for use as with a tire building machine servicer having a conveyor on which tire building materials such as corded ply stock and cordless gum ply or liner stock are intermittently advanced lengthwise for cutting to predetermined length at desired bias angle, said apparatus being characterized in that it has lifting means for lifting a portion of the stock from the conveyor on either side of the line of the desired cut up against a stock support, and a knife blade guided by the apparatus for movement above the conveyor and across the width of the lifted portion of the stock at the desired bias angle, said knife blade having an inclined cutting edge to provide an upward force component to retain the stock against the support during the cutting operation and being heated to facilitate the cutting operation of the uncured rubber-like material of cordless gum liner stock or of the uncured rubber-like material between adjacent cords of corded ply stock. In the case of cutting of corded ply stock, the knife blade is additionally vibrated to facilitate the finding of the desired cut line between adjacent cords thereof.
Inventors
- 👤 G Enders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:29
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/38; B29D30/46; B26; B26D; B26D1/00; B26D1/01; B26D1/04; B26D1/06; B26D1/10; B26D1/105; Y; Y10; Y10T; Y10T83/00; Y10T83/283; Y10T83/293; Y10T83/647; Y10T83/6584; Y10T83/66; Y10T83/768; Y10T83/7755; Y10T83/7763; Y10T83/7768; Y10T83/7772; Y10T83/869; Y10T83/8821; Y10T83/8822
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
Apparatus for cutting tiRe ply stock and the like at a desired bias angle while the stock is supported on the top of a conveyor, said apparatus comprising a guide rail above the conveyor extending longitudinally in a direction parallel to such bias angle; a knife guided by said guide rail for reciprocation along a path above and parallel to such bias angle; reversible drive means on said guide rail operatively engaged with said knife to move it in opposite directions along said guide rail; lifting means on said guide rail movable downwardly to engage a portion of the length of the stock on opposite sides of the desired line of cutting thereof and upwardly to lift the stock into the path of movement of said knife whereby the stock is cut along such line upon movement of said knife in one direction along said guide rail.
Claim 2
Dependent Claim
147 words
Apparatus for cutting tiRe ply stock and the like at a desired bias angle while the stock is supported on the top of a conveyor, said apparatus comprising a guide rail above the conveyor extending longitudinally in a direction parallel to such bias angle; a knife guided by said guide rail for reciprocation along a path above and parallel to such bias angle; reversible drive means on said guide rail operatively engaged with said knife to move it in opposite directions along said guide rail; lifting means on said guide rail movable downwardly to engage a portion of the length of the stock on opposite sides of the desired line of cutting thereof and upwardly to lift the stock into the path of movement of said knife whereby the stock is cut along such line upon movement of said knife in one direction along said guide rail.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 wherein heating means adjacent one end of said guide rail is operative to heat said knife to facilitate the stock cutting operation.
Claim 4
Dependent Claim
70 words
The apparatus of claim 1 wherein heating means adjacent one end of said guide rail is operative to heat said knife while stock is positioned by said conveyor for cutting to predetermined length, the heated knife being effective to facilitate the stock cutting operation; said knife having a laterally thickened portion constituting a heat sink to retain the cutting edge of the knife in heated condition during its cutting stroke.
Claim 5
Dependent Claim
45 words
The apparatus of claim 1 wherein vibrating means on said guide rail imparts lateral vibration to said knife as it initially engages an edge of the stock thus to aid in the finding of the desired cut line between adjacent cords of cord ply stock.
Claim 6
Dependent Claim
77 words
The apparatus of claim 1 wherein heating means adjacent one end of said guide rail is operative to heat said knife to facilitate the stock cutting operation; and wherein vibrating means on said guide rail adjacent to said heating means is operative to vibrate the heated knife laterally as it moves into initial engagement with an edge of the stock thus to facilitate the finding of the desired cut line between adjacent cords of cord ply stock.
Claim 7
Dependent Claim
74 words
The apparatus of claim 1 wherein said lifting means comprises two rows of vacuum cups which engage and lift the stock responsive to downward and upward movement of said lifting means; and means for releasing the vacuum in said cups thus to release the cut stock on opposite sides of the line of cutting for movement onto the conveyor whereby operation of the latter may be initiated during the return stroke of said knife.
Claim 8
Dependent Claim
53 words
The apparatus of claim 1 wherein a fixed frame member is disposed above said guide rail; and wherein said guide rail is pivotally suspended from said frame member for angular adjustment of said guide rail so that the path of movement of said knife corresponds to the desired bias angle of the stock.
Claim 9
Dependent Claim
26 words
The apparatus of claim 2 wherein said heating means has a longitudinal slot to receive and embrace said knife at the end of its return stroke.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |