Patent US3707343A successfully refreshed from Google Patents.
US3707343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for producing articles from a strip of extruded synthetic material
Assignee: Individual
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Filing: 1970-08-25
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Granted: 1972-12-26
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Expires: 1990-08-25
Abstract
Abstract A machine for producing synthetic plastics articles from a strip of synthetic plastics materials in which the strip is subjected to a stepwise action to facilitate the forming operation. In the machine there is provided an accumulation system between an extrusion die head and a shaping device. In accordance with the present invention the accumulation system is constituted by two heated spaced-apart drums for supporting the synthetics material strip with the drum nearer the extrusion die being rotated continuously and the other drum having imparted to it an abrupt angular movement synchronously with means for moving the synthetic plastics strip.
Inventors
- 👤 Daniel Badoux
- 👤 Robert Carry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:29
CPC Classifications
B; B65; B65B; B65B47/00; B65B47/02; B29; B29B; B29B17/00; B29B17/0005; B29C; B29C31/00; B29C31/004; B29C51/00; B29C51/02; B29C51/18; B29C51/26; B29C51/261; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29K; B29K2025/00; B29K2055/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
238 words
A machine for the manufacture of articles from a strip of extruded synthetic material comprising: an extrusion die head; a first rotatable heating drum mounted adjacent said die head to support the extruded strip issuing therefrom; a first driving mechanism rotating said first heating drum at a substantially constant angular velocity to advance said extruded strip at a substantially constant linear speed; a second rotatable heating drum spaced from said first heating drum to support the extruded strip coming from said first drum; a second driving mechanism imparting to said second heating drum a stepwise angular motion to advance said extruded strip issuing from said first heating drum by alternative successive periods of movement and of rest; a shaping device to form articles from said extruded strip during each period of rest of said second heating drum, said device leaving free passage to said strip during each period of movement of said second heating drum; means to actuate said shaping device during each period of rest of said second heating drum; a pair of cooperating driving drums to pull between them the extruded strip issuing from said shaping device; and driving means to impart to one at least of said driving drums a stepwise rotational motion in synchronism with the stepwise motion of said second heating drum, so as to take up said strip from said shaping device during the periods of rest of said second heating drum.
Claim 2
Dependent Claim
238 words
A machine for the manufacture of articles from a strip of extruded synthetic material comprising: an extrusion die head; a first rotatable heating drum mounted adjacent said die head to support the extruded strip issuing therefrom; a first driving mechanism rotating said first heating drum at a substantially constant angular velocity to advance said extruded strip at a substantially constant linear speed; a second rotatable heating drum spaced from said first heating drum to support the extruded strip coming from said first drum; a second driving mechanism imparting to said second heating drum a stepwise angular motion to advance said extruded strip issuing from said first heating drum by alternative successive periods of movement and of rest; a shaping device to form articles from said extruded strip during each period of rest of said second heating drum, said device leaving free passage to said strip during each period of movement of said second heating drum; means to actuate said shaping device during each period of rest of said second heating drum; a pair of cooperating driving drums to pull between them the extruded strip issuing from said shaping device; and driving means to impart to one at least of said driving drums a stepwise rotational motion in synchronism with the stepwise motion of said second heating drum, so as to take up said strip from said shaping device during the periods of rest of said second heating drum.
Claim 3
Dependent Claim
33 words
In a machine as claimed in claim 1, means to disconnect said second heating drum from said second driving mechanism and to temporarily connect said second heating drum with said first driving mechanism.
Claim 4
Dependent Claim
106 words
In a machine as claimed in claim 2: said first driving mechanism comprising a reduction drive motor and a transmission member to connect said motor with said first heating drum; said second driving mechanism comprising an intermediate shaft; a driving member loosely mounted on said shaft, a fluid-operated jack to impart to said driving member an angular reciprocating motion, and a one-way mechanism to angularly connect said driving member with said shaft; and said disconnecting and connecting means comprising a wheel loosely supported by said intermediate shaft, said wheel being driven by said transmission member, and an electromagnetic clutch interposed between said wheel and said shaft.
Claim 5
Dependent Claim
33 words
In a machine as claimed in claim 3, said driving means comprising a second transmission member connecting said second heating drum with said one at least of the driving drums of said pair.
References Cited (Backward Citations)
US3112055A
Cited
FR1250468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |