US3917124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Follow plate for dispensing material
Assignee: Oatey Co
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Filing: 1973-09-10
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Granted: 1975-11-04
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Expires: 1993-09-10
Abstract
Abstract The combination of a generally cylindrical receptacle for flowable products and a follow plate disposed within the receptacle for applying pressure on the flowable contents to force the material through an outlet opening in the lower end of the receptacle. The follow plate is made of a suitable flexible plastic material and comprises a generally annular disc having a tapered peripheral flange extending axially upwardly and radially outwardly therefrom. The flange has a major diameter sufficiently greater than the inner diameter of the receptacle to remain in sliding sealed engagement with the inner wall of the receptacle during axial movement of the follow plate toward the lower end of the receptacle, and a minor diameter which is substantially less than the major diameter to provide a clearance space at the minor flange diameter for clearing any dents or bumps on the inner wall of the receptacle. The flange also desirably has a taper in excess of 10* to permit substantial cocking of the follow plate within the receptacle while still maintaining line contact between the flange at the major diameter thereof and the inner wall of the receptacle to avoid wedging of the follow plate within the receptacle.
Inventors
- 👤 David E Kifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:21
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
In combination, a generally cylindrical receptacle for flowable products having upper and lower ends and a follow plate slidably received within said receptacle, said follow plate comprising a generally annular disc having a tapered peripheral flange extending axially upwardly and radially outwardly therefrom, said flange being made of a flexible plastic material and having a major diameter sufficiently greater than the inner diameter of said receptacle to remain in sliding sealed engagement with the inner wall of the receptacle during axial movement of said follow plate therewithin toward the lower end of said receptacle, and a minor diameter which iS at least one-half inch less than said major diameter to provide a clearance space at the minor flange diameter at least one-fourth inch all the way around said follow plate for clearing any dents or bumps on such inner wall, said flange having a taper in excess of 10* to permit substantial cocking of said follow plate within said receptacle while still maintaining line contact between said flange at the major diameter thereof and the inner wall of said receptacle to avoid wedging of said follow plate within said receptacle.
Claim 2
Dependent Claim
190 words
In combination, a generally cylindrical receptacle for flowable products having upper and lower ends and a follow plate slidably received within said receptacle, said follow plate comprising a generally annular disc having a tapered peripheral flange extending axially upwardly and radially outwardly therefrom, said flange being made of a flexible plastic material and having a major diameter sufficiently greater than the inner diameter of said receptacle to remain in sliding sealed engagement with the inner wall of the receptacle during axial movement of said follow plate therewithin toward the lower end of said receptacle, and a minor diameter which iS at least one-half inch less than said major diameter to provide a clearance space at the minor flange diameter at least one-fourth inch all the way around said follow plate for clearing any dents or bumps on such inner wall, said flange having a taper in excess of 10* to permit substantial cocking of said follow plate within said receptacle while still maintaining line contact between said flange at the major diameter thereof and the inner wall of said receptacle to avoid wedging of said follow plate within said receptacle.
Claim 3
Dependent Claim
50 words
The combination of claim I wherein said minor diameter is approximately 1 1/8 inches less than said major diameter to provide a clearance space at the minor flange diameter of approximately nine-sixteenth inch all the way around said follow plate for clearing any dents or bumps on said inner wall.
Claim 4
Dependent Claim
14 words
The combination of claim 1 wherein said flange has a taper of approximately 21*.
Claim 5
Dependent Claim
17 words
The combination of claim 1 wherein the entire follow plate is made of a flexible plastic material.
Claim 6
Dependent Claim
71 words
The combination of claim 1 wherein said receptacle contains a flowable material such as plastic car body filler, and there are dents or bumps in the inner wall of said receptacle, said flange at said major diameter remaining in sliding sealed engagement with the inner wall of said receptacle and said minor diameter providing a clearance space of said dents during movement of said follow plate past said dents as aforesaid.
Claim 7
Dependent Claim
72 words
The combination of claim 1 wherein there is a central outlet opening in the lower end of said receptacle for discharge of flowable material from said receptacle, and an inlet opening in the upper end of said receptacle for supplying pressurized air to said receptacle above said follow plate, such pressurized air acting on the upper surface of said follow plate to resist cocking and right said follow plate should cocking occur.
Claim 8
Dependent Claim
45 words
The combination of claim 6 wherein the clearance space between said tapered peripheral flange on said follow plate and said inner wall of said receptacle is filled with the flowable material in said receptacle which tends to stabilize said follow plate and resist cocking thereof.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |