Patent US3874830A successfully refreshed from Google Patents.
US3874830A
Expired / Lapsed
US
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Apparatus for post treating preformed foam containers
Assignee: Solo Cup Operating Corp
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Filing: 1973-05-16
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Granted: 1975-04-01
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Expires: 1993-05-16
Abstract
Abstract A system and apparatus for post treating preformed partially finished two piece containers made from foam plastic sheet material first processed with conventional machinery to form the containers. Then post treating the preformed containers by a system and with apparatus, said system including a post treatment process and said apparatus including means for moving novel mold assemblies loaded with the preformed containers to be post treated by applying steam thereto along a circular path from a loading station through successive steam treating, air cooling and ejecting stations for subsequent packaging.
Inventors
- 👤 Paul H Carter
- 👤 Personal Representative Carter
- 👤 Thomas E Marion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:41
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/56
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
202 words
An apparatus for post treating assembled containers made from foamed plastic sheet material comprising a rotatable table with an upper peripheral surface, mold assemblies mounted in a circular path on said upper peripheral surface, said assemblies having mating male and female parts, said male part being horizontally movable radially inboard and outboard of said table surface, into and out of alignment with said female part, said female part being vertically movable upward above said male part and to permit the latter to move outward of said table to a container loading position, said table starting rotation at the loading position and continuously rotating therefrom, cam means activated by said table as it rotates for moving said male and female parts to said container loading positions and thence to closed mating positions to confine the container between the said parts, each of said parts having holder means with inlet ports in said holder means for introducing first steam and then air into said ports in said holder means and said mold parts to treat said container confirmed between them, as the table revolves; said steam acting to expand said container within said mold parts to impart uniform finish and dimension to said containers.
Claim 2
Independent Claim
202 words
An apparatus for post treating assembled containers made from foamed plastic sheet material comprising a rotatable table with an upper peripheral surface, mold assemblies mounted in a circular path on said upper peripheral surface, said assemblies having mating male and female parts, said male part being horizontally movable radially inboard and outboard of said table surface, into and out of alignment with said female part, said female part being vertically movable upward above said male part and to permit the latter to move outward of said table to a container loading position, said table starting rotation at the loading position and continuously rotating therefrom, cam means activated by said table as it rotates for moving said male and female parts to said container loading positions and thence to closed mating positions to confine the container between the said parts, each of said parts having holder means with inlet ports in said holder means for introducing first steam and then air into said ports in said holder means and said mold parts to treat said container confirmed between them, as the table revolves; said steam acting to expand said container within said mold parts to impart uniform finish and dimension to said containers.
Claim 3
Dependent Claim
25 words
An aPparatus for post treating partially assembled containers as described in claim 1, wherein said containers being post treated are one or two piece cups.
Claim 4
Dependent Claim
21 words
An apparatus for post treating partially assembled containers as described in claim 1, wherein said mold parts are formed of metal.
Claim 5
Dependent Claim
60 words
An apparatus, for post treating containers, as described in claim 1, wherein said table rotates in a continuous cycle by suitable drive means from said starting container loading position, to said steam treating position, to said air treating position, and to a container ejecting station and back to said starting loading position for start of a new cycle of rotation.
Claim 6
Dependent Claim
114 words
Apparatus for post treating containers, as described in claim 1, wherein said ejecting station is provided with conduit means for introducing air through said male part holder means and whreby said cam means comprises a first cam roller and a second cam roller each to cooperate with cam track means suitably mounted below said table, said first cam roller moving said female part and its holder above the male part holder, and said second cam roller moving said male part and its holder to the said outboard position as the container ejection air is introduced into the said inlet port of the male part holder to eject the finished container from its mold assembly.
Claim 7
Dependent Claim
57 words
An appartus for post treating assembled containers made from plastic sheet material as described in claim 2, wherein said mold parts are made of pervious metailic material to provide rapid transfer of heat to the said foam plastic sheet material when steam is introduced into the said mold assemblies through their respective male and female mold parts.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |