US3865530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure control during blow-moulding
Assignee: Fried Krupp AG
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Filing: 1972-07-26
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Granted: 1975-02-11
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Expires: 1992-07-26
Abstract
Abstract The injection mandrel of a blow-moulding apparatus has a cupshaped element fitted on the end thereof. A pressurised medium fed through the mandrel enters the mould cavity through an annular gap between the element and the stem of the mandrel. During the blow-moulding operation, the element moves relative to the mandrel to vary the radial dimension of said gap and thus the pressure within the mould cavity.
Inventors
- 👤 Jesselallee
- 👤 Karl-Heinrich Seifert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:45
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/78; B29C49/783; B29C49/08; B29C49/10; B29C49/12; B29C49/58; B29C2049/7834; B29C2049/788; B29C2049/7881; B29C2949/00; B29C2949/07; B29C2949/0715; B29C49/02; B29C49/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
193 words
A blow mould apparatus comprising: a blow mould; a mandrel for receiving an open-ended parison, said mandrel having a longitudinal axis and being formed with an outside surface; means in said mandrel defining a lonGitudinally extending passage therethrough for passing a pressurized medium, said mandrel passage terminating in a discharge orifice at the end thereof; an elongated cup member slidably disposed over the discharge end of said mandrel, said cup member being arranged for slidable axial movement along the axis of said mandrel and relative thereof in response to the pressure of a pressurized medium discharged from the mandrel against the closed end of said cup member to substantially elongate the parison in said mould; said outside surface of said mandrel and the internal surface of said cup member being spaced from each other to define an orifice means which is variable as said cup member is moved relative to said mandrel along the longitudinal axis of said mandrel in response to the pressure of the pressurized medium so that discharge occurs and the orifice moves along the length of said cup member to variably throttle the pressurized medium discharged from said mandrel.
Claim 2
Dependent Claim
193 words
A blow mould apparatus comprising: a blow mould; a mandrel for receiving an open-ended parison, said mandrel having a longitudinal axis and being formed with an outside surface; means in said mandrel defining a lonGitudinally extending passage therethrough for passing a pressurized medium, said mandrel passage terminating in a discharge orifice at the end thereof; an elongated cup member slidably disposed over the discharge end of said mandrel, said cup member being arranged for slidable axial movement along the axis of said mandrel and relative thereof in response to the pressure of a pressurized medium discharged from the mandrel against the closed end of said cup member to substantially elongate the parison in said mould; said outside surface of said mandrel and the internal surface of said cup member being spaced from each other to define an orifice means which is variable as said cup member is moved relative to said mandrel along the longitudinal axis of said mandrel in response to the pressure of the pressurized medium so that discharge occurs and the orifice moves along the length of said cup member to variably throttle the pressurized medium discharged from said mandrel.
Claim 3
Dependent Claim
183 words
A blow mould apparatus comprising: a blow mould; a mandrel for receiving an open-ended parison, said mandrel having a discharge end and a longitudinal axis and being formed with an outside surface; an elongated cup member disposed over the discharge end of said mandrel, said cup member being arranged for slidable axial movement along the axis of said mandrel to elongate the parison in the mould; said outside surface of said mandrel and said internal surface of said cup member being spaced from each other to define a variable orifice means by which to throttle pressurized medium discharged from said mandrel as said cup member is moved relative to said mandrel along the longitudinal axis of said mandrel to vary the spacing therebetween; said variable orifice means being an annular gap variable in accordance with the longitudinal displacement of the cup member; and the internal surface of said cup member being stepped, said stepped internal cup surface and said outside surface of said mandrel forming said variable orifice means to thereby throttle the pressurized medium as said cup member moves along said axis.
Claim 4
Dependent Claim
183 words
A blow mould apparatus comprising: a blow mould; a mandrel for receiving an open-ended parison, said mandrel having a discharge end and a longitudinal axis and being formed with an outside surface; an elongated cup member disposed over the discharge end of said mandrel, said cup member being arranged for slidable axial movement along the axis of said mandrel to elongate the parison in the mould; said outside surface of said mandrel and said internal surface of said cup member being spaced from each other to define a variable orifice means by which to throttle pressurized medium discharged from said mandrel as said cup member is moved relative to said mandrel along the longitudinal axis of said mandrel to vary the spacing therebetween; said variable orifice means being an annular gap variable in accordance with the longitudinal displacement of the cup member; and the internal surface of said cup member being stepped, said stepped internal cup surface and said outside surface of said mandrel forming said variable orifice means to thereby throttle the pressurized medium as said cup member moves along said axis.
Claim 5
Dependent Claim
25 words
The apparatus of claim 1 wherein said variable orifice means is an annular gap variable in accordance with the longitudinal displacement of the cup member.
Claim 6
Dependent Claim
189 words
A blow mould apparatus comprising: a blow mould; a mandrel for receiving an open-ended parison, said mandrel having a longitudinal axis and being formed with an annular outside surface; means in said mandrel defining a longitudinally extending passage therethrough for passing a pressurized medium, said mandrel passage terminating in a discharge orifice at the end thereof; an elongated cup member disposed over the discharge end of said cup member, said cup member being arranged for slidable axial movement along the axis of said mandrel and relative thereto in response to the pressure of a pressurized medium discharged from the mandrel against the closed end of said cup member to substantially elongate the parison in said mould; said outside surface of said mandrel and said internal surface of said cup member being spaced from each other, said spacing being variable by the relative movement of said cup member with respect to said mandrel so that discharge occurs and the orifice moves along the length of said cup member to thus provide a change in the rate of flow of the pressurized medium being discharged into the parison from said mandrel.
Claim 7
Dependent Claim
189 words
A blow mould apparatus comprising: a blow mould; a mandrel for receiving an open-ended parison, said mandrel having a longitudinal axis and being formed with an annular outside surface; means in said mandrel defining a longitudinally extending passage therethrough for passing a pressurized medium, said mandrel passage terminating in a discharge orifice at the end thereof; an elongated cup member disposed over the discharge end of said cup member, said cup member being arranged for slidable axial movement along the axis of said mandrel and relative thereto in response to the pressure of a pressurized medium discharged from the mandrel against the closed end of said cup member to substantially elongate the parison in said mould; said outside surface of said mandrel and said internal surface of said cup member being spaced from each other, said spacing being variable by the relative movement of said cup member with respect to said mandrel so that discharge occurs and the orifice moves along the length of said cup member to thus provide a change in the rate of flow of the pressurized medium being discharged into the parison from said mandrel.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |