US3929536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture resistant corner post
Assignee: Westvaco Corp
•
Filing: 1974-04-18
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Granted: 1975-12-30
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Expires: 1994-04-18
Abstract
Abstract A corner post made of corrugated paperboard is enclosed in a film of plastic or the like and sealed on all sides to protect the corner post from contact with water vapor and thereby retain a high percentage of its dry strength when exposed to high humidity conditions. The plastic film may be selected from the classes consisting of polyethylenes, polyvinyl chlorides or other plastic materials, and the post may be sealed in the plastic enclosure with the aid of a heat shrinking operation, a skin packaging operation, a gluing operation or any combination of the above.
Inventors
- 👤 William G Maughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:37
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/38; B29C63/02; B29K; B29K2711/00; B29K2711/12; Y; Y10; Y10S; Y10S229/00; Y10S229/915; Y10S229/918; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T156/1034; Y10T156/1052; Y10T156/1054; Y10T156/1089; Y10T156/1092; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
50 words
A METHOD OF MANUFACTURING MOISTURE RESISTANT CORNER POSTS CONSTRUCTED FROM CORRUGATED PAPERBOARD OR THE LIKE WHICH ARE PROTECTED FROM MOISTURE PENETRATION AND CONTACT WITH WATER VAPOR TO THEREBY PERMIT CORNER POSTS TO RETAIN A HIGH PERCENTAGE OF THEIR DRY STRENGTH WHEN EXPOSED TO HIGH HUMIDITY CONDITIONS COMPRISING THE STEPS OF:
Claim 2
Independent Claim
50 words
A METHOD OF MANUFACTURING MOISTURE RESISTANT CORNER POSTS CONSTRUCTED FROM CORRUGATED PAPERBOARD OR THE LIKE WHICH ARE PROTECTED FROM MOISTURE PENETRATION AND CONTACT WITH WATER VAPOR TO THEREBY PERMIT CORNER POSTS TO RETAIN A HIGH PERCENTAGE OF THEIR DRY STRENGTH WHEN EXPOSED TO HIGH HUMIDITY CONDITIONS COMPRISING THE STEPS OF:
Claim 3
Dependent Claim
30 words
APPLYING A TOP SHEET OF HEAT SHRINKABLE PLASTIC FILM OF A WIDTH THAT IS GREATER THAN THE WIDTH OF SAID CORNER POSTS TO THE UPPER FACE OF SAID CORNER POSTS;
Claim 4
Dependent Claim
30 words
APPLYING A TOP SHEET OF HEAT SHRINKABLE PLASTIC FILM OF A WIDTH THAT IS GREATER THAN THE WIDTH OF SAID CORNER POSTS TO THE UPPER FACE OF SAID CORNER POSTS;
Claim 5
Dependent Claim
13 words
VACUUM SEALING SAID TOP SHEET TO THE UPPER FACE OF SAID CORNER POSTS;
Claim 6
Dependent Claim
13 words
VACUUM SEALING SAID TOP SHEET TO THE UPPER FACE OF SAID CORNER POSTS;
Claim 7
Dependent Claim
13 words
vacuum sealing said top sheet to the upper face of said corner posts;
Claim 8
Dependent Claim
13 words
vacuum sealing said top sheet to the upper face of said corner posts;
Claim 9
Independent Claim
19 words
A method of manufacturing moisture resistant corner posts constructed from corrugated paperboard or the like comprises the steps of:
Claim 10
Independent Claim
19 words
A method of manufacturing moisture resistant corner posts constructed from corrugated paperboard or the like comprises the steps of:
Claim 11
Dependent Claim
20 words
adhering the top and bottom sheets of plastic film transversely to one another at each end of said corner posts;
Claim 12
Dependent Claim
20 words
adhering the top and bottom sheets of plastic film transversely to one another at each end of said corner posts;
Claim 13
Dependent Claim
22 words
simultaneously adhering the top and bottom sheets of plastic film longitudinally to one another at each side of said corner posts; and,
Claim 14
Dependent Claim
22 words
simultaneously adhering the top and bottom sheets of plastic film longitudinally to one another at each side of said corner posts; and,
Claim 15
Dependent Claim
12 words
applying a layer of adhesive to the bottom of said corner posts;
Claim 16
Dependent Claim
12 words
applying a layer of adhesive to the bottom of said corner posts;
Claim 17
Dependent Claim
12 words
APPLYING A LAYER OF ADHESIVE TO THE BOTTOM OF SAID CORNER POSTS;
Claim 18
Dependent Claim
12 words
APPLYING A LAYER OF ADHESIVE TO THE BOTTOM OF SAID CORNER POSTS;
Claim 19
Dependent Claim
30 words
APPLYING A BOTTOM SHEET OF HEAT SHRINKABLE PLASTIC FILM OF A WIDTH THAT IS GREATER THAN THE WIDTH OF SAID CORNER POSTS TO THE LOWER FACE OF SAID CORNER POSTS;
Claim 20
Dependent Claim
30 words
APPLYING A BOTTOM SHEET OF HEAT SHRINKABLE PLASTIC FILM OF A WIDTH THAT IS GREATER THAN THE WIDTH OF SAID CORNER POSTS TO THE LOWER FACE OF SAID CORNER POSTS;
Claim 21
Dependent Claim
30 words
applying a bottom sheet of heat shrinkable plastic film of a width that is greater than the width of said corner posts to the lower face of said corner posts;
Claim 22
Dependent Claim
30 words
applying a bottom sheet of heat shrinkable plastic film of a width that is greater than the width of said corner posts to the lower face of said corner posts;
Claim 23
Dependent Claim
11 words
collecting the completely film enclosed corner posts sealed on all sides.
Claim 24
Dependent Claim
11 words
collecting the completely film enclosed corner posts sealed on all sides.
Claim 25
Dependent Claim
21 words
simultaneously adhering the top and bottom sheets of plastic film longitudinally to one another at each side of said corner posts;
Claim 26
Dependent Claim
21 words
simultaneously adhering the top and bottom sheets of plastic film longitudinally to one another at each side of said corner posts;
Claim 27
Dependent Claim
21 words
SIMULTANEOUSLY ADHERING THE TOP AND BOTTOM SHEETS OF PLASTIC FILM LONGITUDINALLY TO ONE ANOTHER AT EACH SIDE OF SAID CORNER POSTS,
Claim 28
Dependent Claim
21 words
SIMULTANEOUSLY ADHERING THE TOP AND BOTTOM SHEETS OF PLASTIC FILM LONGITUDINALLY TO ONE ANOTHER AT EACH SIDE OF SAID CORNER POSTS,
Claim 29
Dependent Claim
21 words
ADHERING THE TOP AND BOTTOM SHEETS OF PLASTIC FILM TRANSVERSELY TO ONE ANOTHER AT EACH END OF SAID CORNER POSTS; AND,
Claim 30
Dependent Claim
21 words
ADHERING THE TOP AND BOTTOM SHEETS OF PLASTIC FILM TRANSVERSELY TO ONE ANOTHER AT EACH END OF SAID CORNER POSTS; AND,
Claim 31
Dependent Claim
21 words
adhering the top and bottom sheets of plastic film transversely to one another at each end of said corner posts; and,
Claim 32
Dependent Claim
21 words
adhering the top and bottom sheets of plastic film transversely to one another at each end of said corner posts; and,
Claim 33
Dependent Claim
11 words
collecting the completely film enclosed corner posts sealed on all sides.
Claim 34
Dependent Claim
11 words
collecting the completely film enclosed corner posts sealed on all sides.
Claim 35
Dependent Claim
11 words
COLLECTING THE COMPLETELY FILM ENCLOSED CORNER POSTS SEALED ON ALL SIDES.
Claim 36
Dependent Claim
11 words
COLLECTING THE COMPLETELY FILM ENCLOSED CORNER POSTS SEALED ON ALL SIDES.
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |