US3901637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for tail removal in blow molding machines
Assignee: OI Glass Inc
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Filing: 1973-12-17
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Granted: 1975-08-26
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Expires: 1993-12-17
Abstract
Abstract An apparatus for the removal of the ''''tail'''' or pinched waste portion formed when a tubular parison is pinched shut by the closing of cooperable blow mold sections on the tube to form a blowable shape in the closed blow mold sections. The apparatus includes tail grippers mounted on the respective blow mold sections for opening and closing movement with the sections and engageable with the tail exteriorly of the sections. The grippers are each supported on swinging links for over-center arcuate movement, and the grippers are actuated for such arcuate movement while the mold sections remain closed to thereby remove the tail. The over-center arcuate movement of the grippers maintains and even increases gripper-tail contact during tail removal, and then causes the grippers to separate to release the tail after removal. A simple, yet effective, stop and biasing arrangement is provided to accomodate the over-center gripper movement.
Inventors
- 👤 Noel B Eggert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:50
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/48; B29C49/50; Y; Y10; Y10S; Y10S425/00; Y10S425/806
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
173 words
In an apparatus having opposed blow mold sections defining a blow mold cavity therebetween, the blow mold sections being closable to pinch shut a tubular parison located in a first plane to create a tail protruding exteriorly of said blow mold cavity and on one side of a pinch plane, the improvement comprising spaced tail pulling elements engaging said protruding tail therebetween, support means carried by said blow mold sections, respectively, and supporting said elements for closing movement with said sections, said support means including actuating means for moving said spaced tail pulling elements relative to said sections, and links pivotally interconnecting each of said tail pulling elements and said support means, said links being arcuately movable upon actuation of said actuating means to guide movement of said elements through a multiple stage path including (1) a first stage during which the elements move toward one another and away from said blow mold sections and (2) a second stage during which said elements move away from one another and away from said sections.
Claim 2
Dependent Claim
173 words
In an apparatus having opposed blow mold sections defining a blow mold cavity therebetween, the blow mold sections being closable to pinch shut a tubular parison located in a first plane to create a tail protruding exteriorly of said blow mold cavity and on one side of a pinch plane, the improvement comprising spaced tail pulling elements engaging said protruding tail therebetween, support means carried by said blow mold sections, respectively, and supporting said elements for closing movement with said sections, said support means including actuating means for moving said spaced tail pulling elements relative to said sections, and links pivotally interconnecting each of said tail pulling elements and said support means, said links being arcuately movable upon actuation of said actuating means to guide movement of said elements through a multiple stage path including (1) a first stage during which the elements move toward one another and away from said blow mold sections and (2) a second stage during which said elements move away from one another and away from said sections.
Claim 3
Dependent Claim
28 words
The invention as defined in claim 1 wherein said spaced tail pulling elements are resiliently urged toward said first plane to engage said tail on said first plane.
Claim 4
Dependent Claim
30 words
The invention as defined in claim 1 wherein said support means further includes a carrier rigidly mounted on said actuating means, wherein the links are pivotally interconnected to said carrier.
Claim 5
Dependent Claim
133 words
In a blow molding apparatus having opposed blow mold sections defining a blow mold cavity therebetween, the blow mold sections pinching shut a tubular parison positioned in a first plane to create a tail exteriorly of said blow mold cavity, the improvement of opposed tail pulling elements mounted respectively on said mold sections, resilient means urging said elements toward said first plane for engaging said tail on said first plane, and means for moving said tail pulling elements along a compound path away from said blow mold cavity, said path having a first portiOn during which said tail pulling elements move toward each other and away from said blow mold sections and a second portion during which said tail pulling elements move away from each other and away from the blow mold sections.
Claim 6
Dependent Claim
133 words
In a blow molding apparatus having opposed blow mold sections defining a blow mold cavity therebetween, the blow mold sections pinching shut a tubular parison positioned in a first plane to create a tail exteriorly of said blow mold cavity, the improvement of opposed tail pulling elements mounted respectively on said mold sections, resilient means urging said elements toward said first plane for engaging said tail on said first plane, and means for moving said tail pulling elements along a compound path away from said blow mold cavity, said path having a first portiOn during which said tail pulling elements move toward each other and away from said blow mold sections and a second portion during which said tail pulling elements move away from each other and away from the blow mold sections.
Claim 7
Dependent Claim
60 words
The invention as defined in claim 4 wherein said moving means includes a carrier pivotally connected to said tail pulling element, said resilient means mounted on said carrier, an actuator means for moving said carrier, and a link interconnecting one of said blow mold sections to said carrier, said link for guiding the tail pulling element along said compound path.
Claim 8
Dependent Claim
31 words
The invention as defined in claim 5 wherein said carrier includes a stop for limiting the pivotal motion of said tail pulling elements about said carrier caused by said resilient means.
Claim 9
Dependent Claim
150 words
In an apparatus having opposed blow mold sections defining a blow mold cavity therebetween, the blow mold sections being laterally closable to pinch shut a tubular parison located in a first plane to create a tail lying in said plane and projecting exteriorly of said blow mold cavity, the improvement comprising: actuating means carried by said blow mold sections, a carrier mounted on said actuating means for actuation thereby toward and away from said sections; spaced tail gripping elements pivotally mounted on said carrier and resiliently urged toward said first plane to engage the tail therebetween; and means mounting said carrier and guiding said carrier and said tail grippers through a composite path having a first portion during which the grippers move toward each other and away from the blow mold sections and a second portion during which the grippers move away from each other and away from the sections.
Claim 10
Dependent Claim
150 words
In an apparatus having opposed blow mold sections defining a blow mold cavity therebetween, the blow mold sections being laterally closable to pinch shut a tubular parison located in a first plane to create a tail lying in said plane and projecting exteriorly of said blow mold cavity, the improvement comprising: actuating means carried by said blow mold sections, a carrier mounted on said actuating means for actuation thereby toward and away from said sections; spaced tail gripping elements pivotally mounted on said carrier and resiliently urged toward said first plane to engage the tail therebetween; and means mounting said carrier and guiding said carrier and said tail grippers through a composite path having a first portion during which the grippers move toward each other and away from the blow mold sections and a second portion during which the grippers move away from each other and away from the sections.
Claim 11
Dependent Claim
43 words
The invention as described in claim 7 wherein said carrier includes a stop to limit the pivotal motion of said grippers occasioned by the resilient urging of said carrier, said resilient mounting and said stop for accommodiating the composite path of said grippers.
Claim 12
Dependent Claim
127 words
In a blow mold apparatus including laterally movable blow mold sections defining a cavity therebetween, said sections for pinching shut a tubular parison along a first plane to create a tail exteriorly of the cavity, the improvement comprising: opposed tail gripping elements resiliently mounted on respective blow mold sections and urged toward said first plane for engaging the tail therebetween, actuating means pivotally mounted on said blow mold sections for guiding said gripper elements through a compound path when said actuating means are actuated, said path having a first portion during which the gripper elements move toward each other and away from said blow mold sections and a second portion during which said gripper elements move away from each other and away from the blow mold sections.
Claim 13
Dependent Claim
127 words
In a blow mold apparatus including laterally movable blow mold sections defining a cavity therebetween, said sections for pinching shut a tubular parison along a first plane to create a tail exteriorly of the cavity, the improvement comprising: opposed tail gripping elements resiliently mounted on respective blow mold sections and urged toward said first plane for engaging the tail therebetween, actuating means pivotally mounted on said blow mold sections for guiding said gripper elements through a compound path when said actuating means are actuated, said path having a first portion during which the gripper elements move toward each other and away from said blow mold sections and a second portion during which said gripper elements move away from each other and away from the blow mold sections.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |