Patent US4919607A successfully refreshed from Google Patents.
US4919607A
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US
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Rotary blow molding machine having mold station blowing/neck finishing mechanisms
Assignee: R&B Machine Tool Co
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Filing: 1988-10-03
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Granted: 1990-04-24
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Expires: 2008-10-03
Abstract
Abstract A rotary blow molding machine includes a plurality of mold stations on a rotary carousel. Each mold station includes a pair of mold sections movable toward and away from one another to close or open the mold sections. When closed, the mold sections define a mold blowing cavity and a mold mouth communicating with the blowing cavity and opening external of the closed mold sections. A blowing/neck finishing mechanism preferably is mounted on one of the mold sections for movement between a retracted position where the blow pin is offset from the mold mouth so as not to hinder capturing of the parison in the mold station and a blowing position where the blow pin is inserted in the mold mouth. A pivotal linkage moves the blow pin in an arcuate path toward the mold mouth to insert the blow pin therein to blow a parison received in the blowing cavity and away from the mouth to extract the blow pin from the mouth after parison blowing. The pivotal linkage minimizes arcuate travel of the blow pin as it approaches and enters the mold mouth. The blow pin and mold mouth include cooperating cutting components to pinch and shear the end of the parison received in the mouth when the blow pin is inserted therein.
Inventors
- 👤 M. Warren Martin
- 👤 Lawrence H. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:44
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/58; B29C49/02; B29C49/04; B29C49/28; B29C49/30; B29C49/36; B29C49/04106; B29C49/56; B29C49/5608
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
179 words
A rotary blow molding machine comprising: (a) a base, (b) a carousel rotatably supported on the base, (c) means for rotating the carousel, (d) a plurality of mold stations carried on the carousel in circumferentially spaced apart relation thereon, said mold stations each comprising a pair of mold sections openable and closeable to define, when closed, a blowing cavity and a mold mouth communicating with the blowing cavity and opening outside the closed mold sections, and (e) blowing mechanism cooperatively associated with each mold station, said blowing mechanism having a blow pin movable between a retracted position external of the mold mouth and a blowing position inserted in the mold mouth, means for moving the blow pin in an arcuate path from the retracted position to the blowing position to insert the blow pin in the mold mouth to blow a parison received in the blowing cavity and from the blowing position to the retracted position to withdraw the blow pin from the mold mouth, and means for supplying fluid pressure to the blow pin at the blowing position.
Claim 2
Dependent Claim
179 words
A rotary blow molding machine comprising: (a) a base, (b) a carousel rotatably supported on the base, (c) means for rotating the carousel, (d) a plurality of mold stations carried on the carousel in circumferentially spaced apart relation thereon, said mold stations each comprising a pair of mold sections openable and closeable to define, when closed, a blowing cavity and a mold mouth communicating with the blowing cavity and opening outside the closed mold sections, and (e) blowing mechanism cooperatively associated with each mold station, said blowing mechanism having a blow pin movable between a retracted position external of the mold mouth and a blowing position inserted in the mold mouth, means for moving the blow pin in an arcuate path from the retracted position to the blowing position to insert the blow pin in the mold mouth to blow a parison received in the blowing cavity and from the blowing position to the retracted position to withdraw the blow pin from the mold mouth, and means for supplying fluid pressure to the blow pin at the blowing position.
Claim 3
Dependent Claim
19 words
The machine of claim 1 wherein the carousel is rotatably supported for rotation about a horizontal axis of rotation.
Claim 4
Dependent Claim
23 words
The machine of claim 1 wherein the longitudinal axis of the mold mouth is normal to the axis of rotation of the carousel.
Claim 5
Dependent Claim
24 words
The machine of claim 2 wherein the blow pin includes a longitudinal axis that is substantially parallel to the longitudinal axis of the mouth.
Claim 6
Dependent Claim
34 words
The machine of claim 1 wherein the blow pin and the mold mouth include cooperative means for cutting a portion of the parison in the mold mouth when the blow pin is inserted therein.
Claim 7
Dependent Claim
75 words
The machine of claim 5 wherein the cooperative means in the mold mouth includes an annular strike member in the mold mouth and over which a portion of the parison extends and the cooperative means on the blow pin includes an annular shear surface to cooperate with the strike member upon insertion of the blow pin in the mouth to pinch and cut the parison in said mouth to provide a cut-off portion for removal.
Claim 8
Dependent Claim
43 words
The machine of claim 6 wherein the blowing mechanism includes stripper means disposed on said means for moving the blow pin and movable therewith for removing the cut-off portion of the parison from the mold mouth when the blow pin is withdrawn therefrom.
Claim 9
Dependent Claim
48 words
The machine of claim 1 wherein said means for moving the blow pin moves the blow pin with the longitudinal axis of the blow pin substantially parallel with the longitudinal axis of the mold mouth and with minimized arcuate travel as the blow pin approaches the mold mouth.
Claim 10
Dependent Claim
52 words
The machine of claim 8 wherein said means for moving the blow pin moves the blow pin on one side of the longitudinal axis of the mold mouth and then on the other side of the longitudinal axis of the mold mouth as the blow pin approaches and enters the mold mouth.
Claim 11
Dependent Claim
22 words
The machine of claim 9 wherein said means for moving the blow pin comprises a pivotal linkage mounted on the mold station.
Claim 12
Dependent Claim
16 words
The machine of claim 10 wherein said pivotal linkage includes a pair of parallel pivot links.
Claim 13
Dependent Claim
14 words
The machine of claim 11 wherein one of said pivot links comprises a bellcrank.
Claim 14
Dependent Claim
21 words
The machine of claim 12 including a fluid cylinder connected to the bellcrank to pivot said first link and said bellcrank.
Claim 15
Dependent Claim
206 words
A rotary blow molding machine comprising: (a) a base, (b) a carousel rotatably supported on the base, (c) means for rotating the carousel, (d) a plurality of mold stations mounted on the carousel in circumferentially spaced apart relation thereon, said mold stations each comprising a pair of mold sections closeable and openable by movement toward and away from one another and defining, when closed, a blowing cavity and a mold mouth communicating with the blowing cavity and opening outside the closed mold sections, and (e) a blowing mechanism cooperatively associated with each mold station and disposed on one of said mold sections for movement therewith toward or away from the other of said mold sections as they are opened and closed, said blowing mechanism having a blow pin movable between a retracted position offset from the mouth external thereof and a blowing position inserted in the mouth, pivotal linkage means mounted on said one of said mold sections and operably connected to the blow pin for moving the blow pin in an arcuate path between the retracted position and blowing position, means for actuating the linkage means to move the blow pin, and means for supplying fluid pressure to the blow pin at the blowing position.
Claim 16
Dependent Claim
206 words
A rotary blow molding machine comprising: (a) a base, (b) a carousel rotatably supported on the base, (c) means for rotating the carousel, (d) a plurality of mold stations mounted on the carousel in circumferentially spaced apart relation thereon, said mold stations each comprising a pair of mold sections closeable and openable by movement toward and away from one another and defining, when closed, a blowing cavity and a mold mouth communicating with the blowing cavity and opening outside the closed mold sections, and (e) a blowing mechanism cooperatively associated with each mold station and disposed on one of said mold sections for movement therewith toward or away from the other of said mold sections as they are opened and closed, said blowing mechanism having a blow pin movable between a retracted position offset from the mouth external thereof and a blowing position inserted in the mouth, pivotal linkage means mounted on said one of said mold sections and operably connected to the blow pin for moving the blow pin in an arcuate path between the retracted position and blowing position, means for actuating the linkage means to move the blow pin, and means for supplying fluid pressure to the blow pin at the blowing position.
Claim 17
Dependent Claim
17 words
The machine of claim 14 wherein the carousel is rotatably supported for rotation about a horizontal axis.
Claim 18
Dependent Claim
33 words
The machine of claim 14 wherein the blow pin and mold mouth include cooperative means for cutting a portion of the parison in the mold mouth when the blow pin is inserted therein.
Claim 19
Dependent Claim
77 words
The machine of claim 16 wherein the cooperative means in the mold mouth includes an annular strike member in the mold mouth and over which a portion of the parison extends and the cooperative means on the blow pin includes an annular shear surface to cooperate with the strike member upon insertion of the blow pin in the mold mouth to pinch and cut the parison in said mold mouth to provide a cut-off portion for removal.
Claim 20
Dependent Claim
43 words
The machine of claim 17 wherein the blowing mechanism includes stripper means disposed on the pivotal linkage means and movable therewith for removing the cut-off portion of the parison from the mold mouth when the blow pin is withdrawn from the mold mouth.
Claim 21
Dependent Claim
65 words
The machine of claim 14 wherein the pivotal linkage means moves the blow pin on one side of a longitudinal axis of the mold mouth and then on the other side of the longitudinal axis of the mold mouth with the longitudinal axis of the blow pin substantially parallel with the longitudinal axis of the mold mouth as the blow pin approaches the mold mouth.
Claim 22
Dependent Claim
28 words
The machine of claim 19 wherein the pivotal linkage means inserts the blow pin in the mold mouth coaxially aligned with the longitudinal axis of the mold mouth.
Claim 23
Dependent Claim
46 words
The machine of claim 19 wherein the pivotal linkage means comprises a first and second parallel links pivotally mounted on said one of the mold sections about respective spaced apart pivot axes and pivotally mounted on the blow pin about other respective spaced apart pivot axes.
Claim 24
Dependent Claim
34 words
The machine of claim 21 wherein the blow pin is moved in a circular arc about the pivot axis of one of said first and second links on said one of the mold sections.
Claim 25
Dependent Claim
16 words
The machine of claim 21 wherein one of said first and second links comprises a bellcrank.
Claim 26
Dependent Claim
30 words
The machine of claim 23 wherein said actuating means is operably connected to the bellcrank to rotate the bellcrank about its pivot axis on said one of the mold sections.
Claim 27
Dependent Claim
18 words
The machine of claim 24 wherein said actuating means comprises a fluid piston operably connected to the bellcrank.
Claim 28
Dependent Claim
32 words
The machine of claim 14 wherein each mold station further includes means on the carousel for moving the mold sections toward and away from one another in substantially equal and opposite amounts.
References Cited (Backward Citations)
US25290A
Cited
USRE25290E
Cited
US2901769A
Cited
US2890483A
Cited
US3344471A
Cited
US3531556A
Cited
US3608135A
Cited
US3769394A
Cited
US3764250A
Cited
US4047873A
Cited
US4187065A
Cited
US4187070A
Cited
US4248582A
Cited
US4279587A
Cited
US4213750A
Cited
US4285657A
Cited
US4439127A
Cited
US4497623A
Cited
US4505664A
Cited
US4549865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |