Patent US3580302A successfully refreshed from Google Patents.
US3580302A
Expired / Lapsed
US
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Container filling machine
Assignee: Consolidated Packaging Machinery Corp
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Filing: 1968-05-27
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Granted: 1971-05-25
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Expires: 1988-05-27
Abstract
Abstract A container filling machine having a container supporting tray and a filling head including a charging cylinder and a filling stem, the tray and head being mounted for movement through a predetermined path. A piston is movable in the cylinder and a follower connected to the piston successively engages a first cam section extending along the path for moving the piston in a first direction to draw product from a source into the cylinder and a second cam section extending along the path for moving the piston in the opposite direction to discharge product from the cylinder. A spool-type valve is slidable between a first position placing the charging cylinder in communication with the source and a second position placing the cylinder in communication with the stem, the valve shifting arrangement being disabled prior to the discharge stroke in the absence of a container to be filled whereby the product is returned from the cylinder to the source. The cam sections are pivotally supported for movement in opposite directions to selectively vary the rise of the first cam section and thereby vary the piston stroke and consequently the volume of product dispensed. A spring-loaded check valve in the filling stem opens under discharging pressure applied by the piston, closing when the pressure is released, and a surface tension increasing element at the filling stem outlet avoids dripping. A return cam is positioned adjacent the exit end of the second cam section and is operable to engage the piston follower against the first cam section just prior to the conclusion of the discharge stroke, whereby the piston stroke is determined by the first cam section as a reference and the follower is eliminated as a variable.
Inventors
- 👤 James H Riesenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:39
CPC Classifications
B; B67; B67C; B67C3/00; B67C3/02; B67C3/22; B67C3/24; B67C3/246; B67C3/20; B67C3/206; B67C3/26; B67C7/00; B67C7/0006; B67C7/004; B67C7/0046; B67C2007/006
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
245 words
In a container filling machine, a container supporting tray, a filling head having a charging cylinder including a piston and a filling stem, a source of product to be dispensed, a sliding valve spool movable between a first position placing said charging cylinder in communication with said source and a second position placing said cylinder in communication with said stem, said sliding valve spool having a first passage therein placing said cylinder in communication with said source in said first valve position and a second passage therein placing s aid cylinder in communication with said stem in said second valve position, sealing means on opposite sides of said second passage for sealing said first passage out of communication with said cylinder in said second valve position and sealing said second passage from said source in both valve positions, means mounting said tray and said head for movement through a a predetermined path, cam means for moving said piston in a direction charging said cylinder with product from said source and a direction discharging product from said cylinder through said stem, valve shifting means for moving said valve into said first position for said charging stroke and into said second position for said discharge stroke, said filling stem having a dispensing passage therethrough and an outlet therefrom, and a spring-backed check valve controlling product flow through said passage, said check valve opening under product pressure during said discharge stroke and closing upon release of such pressure.
Claim 2
Dependent Claim
245 words
In a container filling machine, a container supporting tray, a filling head having a charging cylinder including a piston and a filling stem, a source of product to be dispensed, a sliding valve spool movable between a first position placing said charging cylinder in communication with said source and a second position placing said cylinder in communication with said stem, said sliding valve spool having a first passage therein placing said cylinder in communication with said source in said first valve position and a second passage therein placing s aid cylinder in communication with said stem in said second valve position, sealing means on opposite sides of said second passage for sealing said first passage out of communication with said cylinder in said second valve position and sealing said second passage from said source in both valve positions, means mounting said tray and said head for movement through a a predetermined path, cam means for moving said piston in a direction charging said cylinder with product from said source and a direction discharging product from said cylinder through said stem, valve shifting means for moving said valve into said first position for said charging stroke and into said second position for said discharge stroke, said filling stem having a dispensing passage therethrough and an outlet therefrom, and a spring-backed check valve controlling product flow through said passage, said check valve opening under product pressure during said discharge stroke and closing upon release of such pressure.
Claim 3
Dependent Claim
62 words
A container filling machine as set forth in claim 1 wherein said cam means include a first cam section extending along said path for moving said piston in a direction charging said cylinder with product from said source and a second cam section extending along said path for moving said piston in a direction discharging product from said cylinder through said stem.
Claim 4
Dependent Claim
31 words
A container filling machine as set forth in claim 2 together with means for selectively varying the rise of said first cam section thereby to vary the volume of product dispensed.
Claim 5
Dependent Claim
38 words
A container filling machine as set forth in claim 3, wherein said first cam section is pivotally supported adjacent its entrance end, and wherein said last-named means include means for moving said first cam section about its pivot.
Claim 6
Dependent Claim
52 words
A container filling machine as set forth in claim 3, wherein said path is circular, said first and second cam sections comprising a cam ring pivotally supported adjacent the entrance end of said first cam section, said last-named means including means for raising and lowering said cam ring about its pivot support.
Claim 7
Dependent Claim
80 words
A container filling machine as set forth in claim 2, including a cam follower connected to said piston and successively engaging said cam sections as said filling head moves through said path, together with means transferring engagement of said follower from said second cam section to said first cam section just prior to the end of said discharge stroke, whereby the stroke of said piston and the volume of product dispensed is determined by said first section as a reference.
Claim 8
Dependent Claim
85 words
A container filling machine as set forth in claim 2, wherein said path is circular and said first and second cam sections comprise an overhead cam ring, together with a cam follower connected to said piston and successively engaging said cam sections, and means transferring engagement of said cam follower from said second cam section to said first cam section just prior to the end of said discharge stroke, whereby the stroke of said piston is determined by said first cam section as a reference.
Claim 9
Dependent Claim
54 words
A container filling machine as set forth in claim 1, wherein said valve shifting means includes first means for moving said valve into said first position and second mans for moving said valve into said second position, together with means for disabling said second means in the absence of a container on said tray.
Claim 10
Dependent Claim
96 words
A container filling machine as set forth in claim 1 wHerein said valve shifting means include first and second cams engaging a follower connected to said valve spool, together with means for shifting said second valve shifting cam out of spool follower engaging position. 10 A container filling machine as set forth in claim 1, together with a piston rod connected to said piston and a cam follower connected to s aid rod, a cylinder vent passage through said piston and said rod, and means on said rod selectively operable to open and close said passage.
Claim 11
Dependent Claim
139 words
A container filling machine as set forth in claim 1 including a cam follower connected to said piston, said cam means including a first cam section extending along said path and engaging said follower for moving said piston in a first direction to draw product from said source into said cylinder and a second cam section extending along said path and engaging said follower for moving said piston in the opposite direction to discharge product from said cylinder, said valve shifting means including a first means for moving said valve into said first position during the charging stroke of said piston and a second means for moving said valve into said second position during the discharge stroke of said piston, and means urging said follower against said first cam section just prior to the end of said discharge stroke.
Claim 12
Dependent Claim
60 words
A container filling machine as set forth in claim 11, wherein said follower is connected to said piston by means including an arm, and wherein said means urging said follower against said first cam section include a spring-backed ball detent carried by said arm and a detent engaging return cam positioned adjacent the exit end of said second cam section.
Claim 13
Dependent Claim
28 words
A container filling machine as set forth in claim 1, together with means for selectively adjusting the closing force exerted on said check valve by its backing spring.
Claim 14
Dependent Claim
19 words
A container filling machine as set forth in claim 1, together with a tension increasing screen across said outlet.
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |