US4552600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for manufacturing a purge trap tray
Assignee: WR Grace and Co Conn
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Filing: 1982-11-23
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Granted: 1985-11-12
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Expires: 2002-11-23
Abstract
Abstract The present invention is directed to a method and apparatus for manufacturing a tray having an integral purge juice trap. A particularly important step in the method is adhering a border area of a perforated thermoplastic sheet to a raised shoulder area of a tray. Preferably, this step is accomplished simultaneously with the step of perforating the thermoplastic sheet. A preferred method for adhering the border area to the shoulder area is heat sealing.
Inventors
- 👤 Stanislaus J. Laiewski
- 👤 Thomas A. Hessen
- 👤 Thomas R. Hardy
- 👤 Allie F. Gilvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:53
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/261; B65D81/262; B26; B26F; B26F1/00; B26F1/24; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/12; B29C69/00; B29C69/001; B29C69/005; B29D; B29D22/00; B29C2793/00; B29C2793/0045; B29C2793/0063; B29C48/001; B29C48/0022; B29C48/08; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1052; Y10T156/1056; Y10T156/1062; Y10T156/107; Y10T156/12; Y10T156/1304
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
80 words
A method for manufacturing a tray having a purge liquid reservoir comprising: providing a support portion comprising a shoulder area and standoff means raised from a sunken reservoir area wherein said shoulder area completely surrounds said reservoir area; removing a sheet of liquid impermeable thermoplastic material from a larger sheet of said material, said removed sheet having a border area; and simultaneously perforating said removed sheet while adhering said border area to said shoulder area in a liquid tight manner.
Claim 2
Independent Claim
80 words
A method for manufacturing a tray having a purge liquid reservoir comprising: providing a support portion comprising a shoulder area and standoff means raised from a sunken reservoir area wherein said shoulder area completely surrounds said reservoir area; removing a sheet of liquid impermeable thermoplastic material from a larger sheet of said material, said removed sheet having a border area; and simultaneously perforating said removed sheet while adhering said border area to said shoulder area in a liquid tight manner.
Claim 3
Dependent Claim
11 words
The method of claim 1, wherein said support portion is molded.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein said perforating comprises application of heated stainless steel pins to said sheet.
Claim 5
Dependent Claim
12 words
The method of claim 1, wherein said adhering consists of heat sealing.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein said adhering consists of ultrasonic sealing.
Claim 7
Dependent Claim
11 words
The method of claim 1, wherein said adhering consists of gluing.
Claim 8
Dependent Claim
17 words
The method of claim 1, wherein said removal is accomplished by utilization of hot cutting frame means.
Claim 9
Dependent Claim
16 words
The method of claim 1, wherein said removal is accomplished by utilization of hot wire means.
Claim 10
Dependent Claim
17 words
The method of claim 1, wherein said removal is accomplished by utilization of punch and die means.
Claim 11
Dependent Claim
16 words
The method of claim 1, wherein said removal is accomplished by utilization of shearing knife means.
Claim 12
Independent Claim
125 words
An apparatus for forming a tray having a purge liquid reservoir comprising: means adapted to separate a portion of a sheet of thermoplastic material; resiliently mounted transfer block means comprising perforation pin channels and vacuum ports, said block means being adapted to transfer said separated portion to a position where a border area of said separated portion is in substantial contact with a shoulder area of a tray support portion; perforation pin means comprising tips, said perforation pin means being mounted on a crossplate and inserted into said perforation pin channels, whereby, upon depression of said resiliently mounted transfer block means, the tips of said perforation pin means exit said perforation pin channels; and means adapted to adhere aaid border area to said shoulder area.
Claim 13
Independent Claim
125 words
An apparatus for forming a tray having a purge liquid reservoir comprising: means adapted to separate a portion of a sheet of thermoplastic material; resiliently mounted transfer block means comprising perforation pin channels and vacuum ports, said block means being adapted to transfer said separated portion to a position where a border area of said separated portion is in substantial contact with a shoulder area of a tray support portion; perforation pin means comprising tips, said perforation pin means being mounted on a crossplate and inserted into said perforation pin channels, whereby, upon depression of said resiliently mounted transfer block means, the tips of said perforation pin means exit said perforation pin channels; and means adapted to adhere aaid border area to said shoulder area.
Claim 14
Dependent Claim
30 words
The apparatus of claim 11, wherein said separation means is selected from the group of a hot cutting frame, a hot wire, a punch and die or a shearing knife.
Claim 15
Dependent Claim
14 words
The apparatus of claim 11, wherein said adhering means comprises a heat sealing head.
Claim 16
Dependent Claim
18 words
The apparatus of claim 11, wherein said transfer block means comprises a material having a low thermal conductivity.
Claim 17
Dependent Claim
15 words
The apparatus of claim 11, wherein said perforation pin means compries a stainless steel material.
Claim 18
Dependent Claim
24 words
The apparatus of claim 14, wherein said material having a low thermal coonductivity is selected from the group of wood, asbestos or ceramic material.
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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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |