Patent US3946979A successfully refreshed from Google Patents.
US4772306A
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Molten glass gob delivery system
Assignee: Owens Brockway Glass Container Inc
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Filing: 1987-10-13
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Granted: 1988-09-20
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Expires: 2007-10-13
Abstract
Abstract A gob delivery system for molten glass charges or gobs from a multiple orifice feeder to a plurality of parison molds in which the transmit times of the gobs are held to a minimum. The gob scoops, which initially deflect the gobs into straight troughs, are formed with a spiral curve to impart less of a curve to the charge. The deflectors which receive the gobs or charges from the troughs are also formed as spiral curves so that the gobs will be presented to vertical guide tubes with a minimum of angular distortion to give more consistent loading.
Inventors
- 👤 Richard G. Davey
- 👤 Donald E. Schupbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:09
CPC Classifications
C; C03; C03B; C03B7/00; C03B7/14; C03B7/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
An improved gob delivery system for guiding mold charges in gravitational fall from a feeder orifice to a parison mold; wherein a curved scoop having its upper end in vertical alignment beneath the feeder orifice and its lower end movable through an arc into alignment with a plurality of straight stationary troughs, and a plurality of curved deflectors having their receiving or entrance ends in alignment with the exit ends of the troughs and their exit ends forming a straight section in vertical alignment with the mold cavities, the improvement comprising, said curved scoop being formed using transition spirals to assure gradual transition from circular to linear and linear to circular motion, said curved scoop having a curvature at a point which is proportional to the arc length measured from the start of the curve to the point.
Claim 2
Dependent Claim
138 words
An improved gob delivery system for guiding mold charges in gravitational fall from a feeder orifice to a parison mold; wherein a curved scoop having its upper end in vertical alignment beneath the feeder orifice and its lower end movable through an arc into alignment with a plurality of straight stationary troughs, and a plurality of curved deflectors having their receiving or entrance ends in alignment with the exit ends of the troughs and their exit ends forming a straight section in vertical alignment with the mold cavities, the improvement comprising, said curved scoop being formed using transition spirals to assure gradual transition from circular to linear and linear to circular motion, said curved scoop having a curvature at a point which is proportional to the arc length measured from the start of the curve to the point.
Claim 3
Dependent Claim
44 words
The improved gob delivery system of claim 1 further including said curved deflectors being formed using transition spirals, said curved deflectors having a curvature at a point which is proportional to the "arc length" measured from the start of the curve to the point.
Claim 4
Dependent Claim
21 words
The improved gob delivery system of claim 1 or 2 wherein said curves for the scoop and deflectors are clothoid spirals.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |