Patent DE843136C successfully refreshed from Google Patents.
US3650656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making hollow plastic articles
Assignee: Robert Bosch GmbH
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Filing: 1969-06-13
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Granted: 1972-03-21
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Expires: 1989-06-13
Abstract
Abstract Selected portions of tubular thermoplastic parisons are heated from inside prior to introduction into the cavity of a blow molding unit. Steam which heats the parisons from inside is discharged by orifices provided in a hollow mandrel which is connected to a source of steam and extends with clearance through a hollow rotary shaft cooperating with a clamping device for parisons. The mandrel can be mounted for reciprocatory and/or rotary movement with reference to the shaft.
Inventors
- 👤 Gunther Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:49
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/08; B29C49/10; B29C49/12; B29C49/42; B29C49/4205; B29C49/42073; B29C49/42093; B29C49/42101; B29C49/64; B29C49/6409; B29C49/6436; B29C49/6445; B29C2949/00; B29C2949/07; B29C2949/0715; B29C49/02; B29C49/06; Y; Y10; Y10S; Y10S425/00; Y10S425/038
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
133 words
In an apparatus for conversion of synthetic thermoplastic parisons into hollow articles, particularly in a blow-molding apparatus, a combination comprising a parison holding component comprising a hollow shaft; a heating medium supplying component arranged to extend with clearance into a parison which is carried by said holding component and comprising a hollow mandrel extending axially into said shaft and having at least one orifice arranged to discharge a heating medium against the inner surface of a parison which is carried by said hollow shaft; means for delivering the heating medium to said hollow mandrel, said mandrel and said shaft defining between themselves an annular clearance for evacuation of spent heating medium; and drive means for moving at least one of components with reference to the other component while said orifice discharges heating medium.
Claim 2
Dependent Claim
133 words
In an apparatus for conversion of synthetic thermoplastic parisons into hollow articles, particularly in a blow-molding apparatus, a combination comprising a parison holding component comprising a hollow shaft; a heating medium supplying component arranged to extend with clearance into a parison which is carried by said holding component and comprising a hollow mandrel extending axially into said shaft and having at least one orifice arranged to discharge a heating medium against the inner surface of a parison which is carried by said hollow shaft; means for delivering the heating medium to said hollow mandrel, said mandrel and said shaft defining between themselves an annular clearance for evacuation of spent heating medium; and drive means for moving at least one of components with reference to the other component while said orifice discharges heating medium.
Claim 3
Dependent Claim
145 words
In an apparatus for conversion of synthetic thermoplastic parisons into hollow articles, particularly in a blow-molding apparatus, a combination comprising a parison holding component; a heating medium supplying component arranged to extend with clearance into a parison which is carried by said holding component and comprising a hollow mandrel which is provided with a plurality of orifices arranged to discharge the heating medium against the inner surface of a parison which is carried by said parison holding component; means for delivering the heating medium to said supply component; means for throttling the flow of heating medium to at least one of said orifices and comprising a pin extending transversely across the interior of said mandrel between a selected pair of said orifices; and drive means for moving at least one of said components with reference to the other component while said orifices discharge heating medium.
Claim 4
Dependent Claim
145 words
In an apparatus for conversion of synthetic thermoplastic parisons into hollow articles, particularly in a blow-molding apparatus, a combination comprising a parison holding component; a heating medium supplying component arranged to extend with clearance into a parison which is carried by said holding component and comprising a hollow mandrel which is provided with a plurality of orifices arranged to discharge the heating medium against the inner surface of a parison which is carried by said parison holding component; means for delivering the heating medium to said supply component; means for throttling the flow of heating medium to at least one of said orifices and comprising a pin extending transversely across the interior of said mandrel between a selected pair of said orifices; and drive means for moving at least one of said components with reference to the other component while said orifices discharge heating medium.
Claim 5
Dependent Claim
21 words
A combination as defined in claim 1, wherein said orifice is arranged to discharge heating medium substantially radially of said mandrel.
Claim 6
Dependent Claim
18 words
A combination as defined in claim 1, wherein said supplying component is provided with a plurality or orifices.
Claim 7
Dependent Claim
38 words
A combination as defined in claim 4, wherein said hollow mandrel has a portion extending into the interior of the parison which is carried by said holding component, said orifices being provided in said portion of said mandrel.
Claim 8
Dependent Claim
17 words
A combination as defined in claim 4, wherein at least one of said orifices is a slot.
Claim 9
Dependent Claim
20 words
A combination as defined in claim 6, wherein said slot is inclined with reference to the axis of said mandrel.
Claim 10
Dependent Claim
22 words
A combination as defined in claim 4, wherein several of said orifices are slots and wherein said slots are of identical width.
Claim 11
Dependent Claim
29 words
A combination as defined in claim 8, wherein at least one of said slots has a length which is different from the length of at least one other slot.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |