US3601848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines for making tubes, laminated rods, and laminated strips from liquid multicomponent plastic material
Assignee: Individual
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Filing: 1969-02-26
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Granted: 1971-08-31
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Expires: 1989-02-26
Abstract
Abstract A machine for making tubes, pipes, laminated rods, and laminated strips from liquid multicomponent plastic material comprises two endless traveling moulding belts between which the plastic material is introduced while in a viscous or pastelike state through a nozzle while a core material and if desired outer layer material are simultaneously introduced between the belts. The core material may be a hose, means being provided for feeding a fluid under pressure to the hose to blow it up into tubular shape, means being provided for removing the hose from the tube when being formed. Alternatively, the nozzle may form the end of a mandrel which carries one or two lengths of hose, a pulsating fluid being supplied to the hose or hoses to inflate and deflate the same, the mandrel reciprocating in synchronism with the pulsations of the fluid. If two hoses are provided, one hose may be mounted on a tubular member reciprocatably mounted on the mandrel, movements of the mandrel and the tubular member being in counterphase to one another.
Inventors
- 👤 Richard Zippel Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:15
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C43/00; B29C43/22; B29C43/224; B29C44/20; B29C44/30; B29C44/306; B29C48/00; B29C48/03; B29C48/06; B29C48/07; B29C48/08; B29C48/09; B29C48/25; B29C48/30; B29C48/303; B29L; B29L2007/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
A moulding for producing moulded articles from settable plastics material comprising in combination: a feed pipe to receive settable plastics materIal; heating means to heat said plastics material to a pastelike consistency whilst said plastics material is in transit in said feed pipe; two endless travelling mould means cooperating along portions of their respective paths to define a continuous mould cavity; a nozzle having a duct communicating with said feed pipe to eject said plastics material into said mould cavity; said duct encompassing a central passage in said nozzle and having an external wall in close proximity to said mould means; said nozzle projecting between said two endless mould means into said mould cavity defined therebetween and having an exit orifice within said cavity; and guide means to guide elongate material along a path extending in said central passage and said mould cavity.
Claim 2
Dependent Claim
143 words
A moulding for producing moulded articles from settable plastics material comprising in combination: a feed pipe to receive settable plastics materIal; heating means to heat said plastics material to a pastelike consistency whilst said plastics material is in transit in said feed pipe; two endless travelling mould means cooperating along portions of their respective paths to define a continuous mould cavity; a nozzle having a duct communicating with said feed pipe to eject said plastics material into said mould cavity; said duct encompassing a central passage in said nozzle and having an external wall in close proximity to said mould means; said nozzle projecting between said two endless mould means into said mould cavity defined therebetween and having an exit orifice within said cavity; and guide means to guide elongate material along a path extending in said central passage and said mould cavity.
Claim 3
Dependent Claim
42 words
A moulding machine as defined in claim 1, comprising further guide means to guide strip material through respective further passages between said outer wall of said duct and the respective ones of said two endless mould means and into said mould cavity.
Claim 4
Dependent Claim
38 words
A moulding machine as defined in claim 1, wherein said elongate material comprises inflatable tubular material guided through said central passage and into said mould cavity, whereby said inflatable material when within the moulded article may be inflated.
Claim 5
Dependent Claim
119 words
A moulding machine as defined in claim 3, wherein said central passage comprises a slot of substantially rectangular cross section. 5 A moulding machine as defined in claim 1, further comprising a mandrel extending through said central passage and projecting therefrom into said mould cavity, a shroud of said elongate material shrouding an end portion of said mandrel in said mould cavity and extending through said central passage, said mandrel having at least a first internal passage to supply fluid under pressure to the interior of said shroud, and said guide means comprising a gap defined between the outer surface of said mandrel and said internal wall of said duct for the introduction of said shroud into said cavity.
Claim 6
Dependent Claim
36 words
A moulding machine as defined in claim 5, wherein said central passage is substantially circular in cross section, said mandrel is substantially cylindrical and said gap is annular, and said elongate material comprises a polyethylene hose.
Claim 7
Dependent Claim
55 words
A moulding machine as defined in claim 6, wherein said end portion of said mandrel is provided with two protruding annular ribs which are spaced a predetermined distance apart along the axis of said mandrel, and said mandrel is provided with a second fluid passage terminating between said annular ribs and communicating with the atmosphere.
Claim 8
Dependent Claim
93 words
A moulding machine as defined in claim 1, further comprising a mandrel extending through said central passage and projecting therefrom into said mould cavity, an envelope of said elongate material shrouding an end portion of said mandrel inside said mould cavity, and means for reciprocating said mandrel to guide said envelope of elongate material along a path extending into said central passage and said mould cavity, said mandrel having an internal passage to supply a fluid under pulsating pressure to said envelope, and means to reciprocate said mandrel in synchronism with said pulsations.
Claim 9
Dependent Claim
16 words
A moulding machine as defined in claim 8, wherein said elongate material comprises a polyethylene hose.
Claim 10
Dependent Claim
190 words
A moulding machine as defined in claim 1, further comprising a mandrel extending through said central passage and projecting therefrom into said mould cavity, a first envelope of said elongate material shrouding an end portion of said mandrel inside said mould cavity, means for reciprocating said mandrel to guide said first envelope of elongate material along a path extending in said cavity, a tubular member slidably mounted on an intermediate portion of said mandrel, a further envelope of said elongate material mounted on said tubular member, said mandrel having an internal passage to supply fluid under pulsating pressure to said first envelope, said tubular member having an Internal passage to supply fluid under pulsating pressure to said further envelope, and means to reciprocate said mandrel in synchronism with said pulsations of said fluid supplied to said first envelope, further means to reciprocate said tubular member relative to said mandrel to guide said further envelope of said elongate material along a path extending into said central passage and said mould cavity, and means to coordinate said reciprocal movement of said tubular member in counterphase to said reciprocal movement of said mandrel.
Claim 11
Dependent Claim
16 words
A moulding machine as defined in claim 10, wherein said elongate material comprises a polyethylene hose.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |