US3883286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow molding method and apparatus
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1973-12-17
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Granted: 1975-05-13
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Expires: 1993-12-17
Abstract
Abstract A process and apparatus for blow molding hollow plastic articles. The apparatus includes a pair of mold transport assemblies, one positioned on either side of the head of a plastic parison extruder. The mold transport assemblies reciprocate to carry the mold halves under the parison extruder to receive the parison and return to separate blow stations. The device utilizes a cam and cam follower mechanism for opening and closing the mold halves. The apparatus is movable for the purpose of mold setup. After mold setup is complete, the apparatus is mounted on a fixed platform beneath the extruder. The platform is adjustable in all directions to provide alignment of the apparatus with the extruder.
Inventors
- 👤 Jr William G Kinslow
- 👤 Paul A Marchant
- 👤 Robert D Bessier
- 👤 Robert X Hafele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:35
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/28; B29C49/30; B29C49/32; B29C49/02; B29C49/04; B29C49/04102; B29C49/42; B29C49/56; B29C49/5601; B29C49/5602; B29C49/5603; B29C49/48; B29C2049/4856; B29C2049/48615; B29C49/561
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
In a blow molding apparatus an assembly for transporting a tubular parison between a parison supply Station and a blow station the combination comprising: a. a support frame including a base plate, a pair of side plates attached to opposite edges of said base plate; b. wheel means attached to said support frame; c. a pneumatic power means attached to said base plate; d. a cam rotatively coupled to said power means; e. a pair of cam followers coupled to said cam; f. a pair of sleeves mounted between said side plates; g. a pair of shafts slidably received in said sleeves; h. a first platen attached to one end of said pair of shafts; i. a second platen slidably mounted on said pair of shafts between said first platen and one of said side plates; j. means coupling one of said cam followers to the other end of said pair of shafts; and k. means coupling the other of said cam followers to said second platen.
Claim 2
Dependent Claim
167 words
In a blow molding apparatus an assembly for transporting a tubular parison between a parison supply Station and a blow station the combination comprising: a. a support frame including a base plate, a pair of side plates attached to opposite edges of said base plate; b. wheel means attached to said support frame; c. a pneumatic power means attached to said base plate; d. a cam rotatively coupled to said power means; e. a pair of cam followers coupled to said cam; f. a pair of sleeves mounted between said side plates; g. a pair of shafts slidably received in said sleeves; h. a first platen attached to one end of said pair of shafts; i. a second platen slidably mounted on said pair of shafts between said first platen and one of said side plates; j. means coupling one of said cam followers to the other end of said pair of shafts; and k. means coupling the other of said cam followers to said second platen.
Claim 3
Dependent Claim
31 words
In the transport assembly of claim 1 wherein said cam is provided with a pair of opposed, generally arcuately shaped openings and said cam followers include rollers received in said openings.
Claim 4
Dependent Claim
18 words
In the transport assembly of claim 2 wherein said cam oscillates through an arc of about ninety degrees.
Claim 5
Dependent Claim
50 words
In the transport assembly of claim 3 wherein one of said rollers is coupled to said other end of said pair of shafts through means which includes a pair of drive rods and the other of said rollers is coupled to said second platen through a pair of drive rods.
Claim 6
Dependent Claim
37 words
In the transport assembly of claim 4 wherein said coupling means also includes movable means on said other end of said pair of shafts connected to the end of said pair of drive rods opposite said roller.
Claim 7
Dependent Claim
66 words
In the transport assembly of claim 1 wherein said pneumatic power means includes a power cylinder, a power piston in said power cylinder, a closed loop drive chain having each of its ends attached to opposite sides of said power piston, a drive sprocket engaged by said drive chain, a cam shaft connected to said drive sprocket, and means connecting said cam shaft to said cam.
Claim 8
Dependent Claim
45 words
In the transport assembly of claim 6 wherein said pneumatic power means also includes an idler sprocket engaged by said drive chain, fluid tight housing means enclosing said drive chain, drive sprocket and idler sprocket and sealingly engaging the open ends of said power cylinder.
Claim 9
Dependent Claim
31 words
In the transport assembly of claim 7 which includes a pilot cylinder sealed to said housing; a pilot piston in said pilot cylinder, said drive chain connected to said pilot piston.
Claim 10
Dependent Claim
31 words
In the transport assembly of claim 1 wherein said pneumatic power means is movably attached to said base plate for movement in a path parallel to the axis of said shafts.
Claim 11
Dependent Claim
46 words
In the transport assembly of claim 9 wherein said pneumatic power means is movably attached to said base plate by means of a keyway block attached to said base plate and a key attached to said pneumatic power means and slidably received in said keyway block.
Claim 12
Dependent Claim
34 words
In the transport assembly of claim 1 which includes a blow mold having two identical halves, one half being attached to said first platen and the other half being attached to said second platen.
References Cited (Backward Citations)
US3103701A
Cited
US3496600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |