US3863834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tear-Strip for Paperboard Container
Assignee: Somerville Industries Ltd
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Filing: 1973-10-09
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Granted: 1975-02-04
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Expires: 1993-10-09
Abstract
Abstract This invention relates to a paperboard container having a tearstrip, said tear-strip having its side edges each defined by a series of cuts, the terminal end of each cut being in advance of the initial end of the next following cut in the direction of tear of said tear-strip, the terminal end portion of each cut being inclined towards the next following cut.
Inventors
- 👤 Peter E Sandford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:50
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/4266; Y; Y10; Y10S; Y10S229/00; Y10S229/94; Y10T; Y10T428/00; Y10T428/15
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
A paperboard container having a tear-strip in a panel thereof, said tear-strip having its side edges each defined by a series of cuts, the terminal end of each cut being in advance of the initial end of the next following cut in the direction of tear of said tear-strip, the terminal end portion of each cut being inclined in a direction that intersects the next following cut a substantial distance from its initial end whereby pulling force on the strip in the direction of tear is applied substantially to tear initiation at the terminal ends of said cuts in succession.
Claim 2
Dependent Claim
100 words
A paperboard container having a tear-strip in a panel thereof, said tear-strip having its side edges each defined by a series of cuts, the terminal end of each cut being in advance of the initial end of the next following cut in the direction of tear of said tear-strip, the terminal end portion of each cut being inclined in a direction that intersects the next following cut a substantial distance from its initial end whereby pulling force on the strip in the direction of tear is applied substantially to tear initiation at the terminal ends of said cuts in succession.
Claim 3
Dependent Claim
36 words
A paperboard container having a tear-strip as claimed in claim 1 in which the terminal end portion of each cut is in substantially parallel spaced relation to the initial end portion of the next following cut.
Claim 4
Dependent Claim
17 words
A paperboard container having a tear-strip as claimed in claim 2 in which said cuts are S-shaped.
Claim 5
Dependent Claim
100 words
A paperboard panel having a perforated line, said perforated line comprising: a series of cuts in said panel, the terminal end of each cut being in advance of the initial end of the next following cut in the direction of progression of said series, the terminal end portion of each cut being inclined in a direction that intersects the next following cut a substantial distance from its initial end whereby seperating force along said line in the direction of progression of said series of cuts is applied substantially to tear initiation at the terminal ends of said cuts in suceEssion.
Claim 6
Dependent Claim
100 words
A paperboard panel having a perforated line, said perforated line comprising: a series of cuts in said panel, the terminal end of each cut being in advance of the initial end of the next following cut in the direction of progression of said series, the terminal end portion of each cut being inclined in a direction that intersects the next following cut a substantial distance from its initial end whereby seperating force along said line in the direction of progression of said series of cuts is applied substantially to tear initiation at the terminal ends of said cuts in suceEssion.
Claim 7
Dependent Claim
37 words
A paperboard panel having a perforated line as claimed in claim 4 in which the terminal end portion of each cut is in substantially parallel spaced relation to the initial end portion of the next following cut.
Claim 8
Dependent Claim
18 words
A paperboard panel having a perforated line as claimed in claim 5 in which said cuts are S-shaped.
Claim 9
Dependent Claim
38 words
A paperboard container having a tear-strip as claimed in claim 1 in which a line starting from the terminal end of each cut and proceeding in the direction of grain of the paperboard intersects the next following cut.
Claim 10
Dependent Claim
38 words
A paperboard container having a tear-strip as claimed in claim 2 in which a line starting from the terminal end of each cut and proceeding in the direction of grain of the paperboard intersects the next following cut.
Claim 11
Dependent Claim
38 words
A paperboard container having a tear-strip as claimed in claim 3 in which a line starting from the terminal end of each cut and proceeding in the direction of grain of the paperboard intersects the next following cut.
Claim 12
Dependent Claim
39 words
A paperboard panel having a perforated line as claimed in claim 4 in which a line starting from the terminal end of each cut and proceeding in the direction of grain of the paperboard intersects the next following cut.
Claim 13
Dependent Claim
39 words
A paperboard panel having a perforated line as claimed in claim 5 in which a line starting from the terminal end of each cut and proceeding in the direction of grain of the paperboard intersects the next following cut.
Claim 14
Dependent Claim
39 words
A paperboard panel having a perforated line as claimed in claim 6 in which a line starting from the terminal end of each cut and proceeding in the direction of grain of the paperboard intersects the next following cut.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |