US3877655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System, method and apparatus for processing raw rubber into strip stock for retreading tires
Assignee: Individual
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Filing: 1974-02-07
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Granted: 1975-04-15
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Expires: 1994-02-07
Abstract
Abstract Heavy blocks, sheets or strips of raw rubber are converted by a conventional rubber mill to continuous strip material which is fed continuously, first through a cooling water bath, then through a second dry or liquid bath to reduce the stickiness of the strip stock as it proceeds toward and is wound onto a reusable spool. The spool is removably mounted on a cantilevered driven spindle of a rubber-winding machine having a torquelimiting drive feature so as not to wind the strip too tightly on the spool and a level wind mechanism for winding the strip stock evenly on the spool. When the spool is full, an ejection mechanism on the winding machine ejects the spool from the spindle. The heavy spool, having a 600- to 800-pound capacity, is lifted from ground level to a free-spooling position on a special wheeled hand cart equipped with a lever-actuated lift mechanism. The spool is wheeled on the cart to the infeed end of the extruding portion of a tire-retreading machine, and there the strip stock is free-spooled directly from the cart-mounted spool into the extruder for final sizing before being applied by the machine onto a tire being retreaded.
Inventors
- 👤 Felix G Cardinal
- 👤 Ralph V Cardinal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:35
CPC Classifications
B; B65; B65H; B65H54/00; B65H54/02; B65H54/28; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/58; B29D30/60; B29K; B29K2021/00; B29K2105/00; B29K2105/24; B29K2105/246; B65H2701/00; B65H2701/30; B65H2701/37; Y; Y10; Y10S; Y10S242/00; Y10S242/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
434 words
In a system for processing raw rubber into strip stock for use in retreading rubber tires, including a rubber mill and an extruder-retreading machine, a strip-winding machine for winding rubber strip stock onto a spoOl for delivery to said extruder-retreading machine as the strip stock emerges in a continuous strip from said rubber mill, said strip-winding machine comprising: a horizontally disposed rotatable spindle means for removably mounting a spool thereon, including spool-engaging means on said spindle means for drivingly engaging said spool, spindle drive means for rotating said spindle means and thus said spool, said spindle drive means including torque-limiting means for limiting the torque transmitted to said spindle means and thereby controlling the tension in strip stock being wound on said spool, level wind means driven from said spindle drive means for winding strip stock evenly on a spindle-mounted spool, and spool ejector means for selectively ejecting a spool from said spindle means, said spindle means including a spool-mounting portion and a spindle shaft portion, said spindle shaft portion being of approximately the same length as said spool-mounting portion, said spindle shaft portion being rotatably supported by bearing means adjacent its opposite ends, said spool-mounting portion being cantilevered from and forming an axial extension of said spindle shaft portion and terminating at an unsupported free end, said spool ejector means including rail means extending parallel to and below said spool-mounting portion of said spindle means, said rail means extending along the length of said spoolmounting portion and longitudinally outwardly beyond said free end of said spool-mounting portion, wheeled platform means mounted for movement along said rail means toward and away from said free end with a spoolsupporting surface just slightly below the lowermost limits of a spool when mounted on said spool-mounting portion, extensible pusher means including a vertically extending pusher plate connected to said platform means and fluid-operated cylinder means having an extensible ram portion connected to said pusher plate and an axis of extension lying generally parallel to the axis of rotation of said spindle means, said extensible ram portion having a stroke at least as great as the length of said spool-mounting portion and being movable from a retracted position wherein said pusher plate is positioned rearwardly of a spool mounted on said spool-mounting portion and said platform means is positioned below said spool-mounting portion to an extended position to engage said pusher plate with said spool and push said spool from said spool-mounting portion and simultaneously move said platform means to a position outwardly of said spool-mounting portion to receive said spool as it drops from said spool-mounting portion.
Claim 2
Dependent Claim
434 words
In a system for processing raw rubber into strip stock for use in retreading rubber tires, including a rubber mill and an extruder-retreading machine, a strip-winding machine for winding rubber strip stock onto a spoOl for delivery to said extruder-retreading machine as the strip stock emerges in a continuous strip from said rubber mill, said strip-winding machine comprising: a horizontally disposed rotatable spindle means for removably mounting a spool thereon, including spool-engaging means on said spindle means for drivingly engaging said spool, spindle drive means for rotating said spindle means and thus said spool, said spindle drive means including torque-limiting means for limiting the torque transmitted to said spindle means and thereby controlling the tension in strip stock being wound on said spool, level wind means driven from said spindle drive means for winding strip stock evenly on a spindle-mounted spool, and spool ejector means for selectively ejecting a spool from said spindle means, said spindle means including a spool-mounting portion and a spindle shaft portion, said spindle shaft portion being of approximately the same length as said spool-mounting portion, said spindle shaft portion being rotatably supported by bearing means adjacent its opposite ends, said spool-mounting portion being cantilevered from and forming an axial extension of said spindle shaft portion and terminating at an unsupported free end, said spool ejector means including rail means extending parallel to and below said spool-mounting portion of said spindle means, said rail means extending along the length of said spoolmounting portion and longitudinally outwardly beyond said free end of said spool-mounting portion, wheeled platform means mounted for movement along said rail means toward and away from said free end with a spoolsupporting surface just slightly below the lowermost limits of a spool when mounted on said spool-mounting portion, extensible pusher means including a vertically extending pusher plate connected to said platform means and fluid-operated cylinder means having an extensible ram portion connected to said pusher plate and an axis of extension lying generally parallel to the axis of rotation of said spindle means, said extensible ram portion having a stroke at least as great as the length of said spool-mounting portion and being movable from a retracted position wherein said pusher plate is positioned rearwardly of a spool mounted on said spool-mounting portion and said platform means is positioned below said spool-mounting portion to an extended position to engage said pusher plate with said spool and push said spool from said spool-mounting portion and simultaneously move said platform means to a position outwardly of said spool-mounting portion to receive said spool as it drops from said spool-mounting portion.
Claim 3
Dependent Claim
208 words
A machine according to claim 1 wherein said level wind means includes a guideway means extending above and parallel to said spindle means, a first horizontally slotted slide member movable along said guideway above said spool-mounting portion of said spindle means for guiding strip material onto a spool on said spindle means, endless drive means including an endless drive member displaced horizontally and axially from said first slide member and extending generally parallel to said spindle means with the length of said endless drive member defining the stroke of reciprocation of said first slide member, a second slide member slidable along said guideway means in the region of said endless drive member but offset laterally therefrom, said second slide member being vertically slotted with the vertical length of said slot being at least as great as the vertical extent of said endless drive member, said endless drive member including drive pin means extending laterally into the vertical slot of said second slide member whereby unidirectional rotational movement of said endless drive members effects horizontal reciprocation of said second slide member, and connecting rod means operatively interconnecting said first and second slide members whereby reciprocation of said second slide member causes a corresponding reciproCation of said first slide member.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |