Patent US4634007A successfully refreshed from Google Patents.
US4634007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carton blank with perforated tear line
Assignee: Graphic Packaging Corp
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Filing: 1985-12-02
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Granted: 1987-01-06
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Expires: 2005-12-02
Abstract
Abstract A carton blank formed from a paperboard sheet having a grain extending in one direction and at least one tear line in the carton blank which tear line extends in a direction across the grain.
Inventors
- 👤 Kevin R. Rusnock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:55
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/54; B65D5/545; Y; Y10; Y10S; Y10S229/00; Y10S229/94
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
186 words
A carton blank comprising: a paperboard sheet having a length, a width and a thickness and a grain extending in a direction along said length; a plurality of fold lines in said paperboard sheet to define a plurality of panels which are adapted to be folded to form a carton; at least one of said fold lines comprising a tear line; said tear line comprising a first plurality of perforations and a second plurality of perforations formed in said paperboard sheet; each of said first plurality of perforations comprising a double Y shape wherein each Y shape has a straight leg and two arms extending angularly from one end of said straight leg and said double Y shape is formed by superposing the leg of each Y shape with two angularly extending arms at each end of the superposed legs; each of said second plurality of perforations comprising a linear shape; and said tear line is formed by alternating a double Y shaped perforation and a linear shaped perforation with said superposed legs and said linear shaped perforations being in alignment and forming said fold line.
Claim 2
Dependent Claim
186 words
A carton blank comprising: a paperboard sheet having a length, a width and a thickness and a grain extending in a direction along said length; a plurality of fold lines in said paperboard sheet to define a plurality of panels which are adapted to be folded to form a carton; at least one of said fold lines comprising a tear line; said tear line comprising a first plurality of perforations and a second plurality of perforations formed in said paperboard sheet; each of said first plurality of perforations comprising a double Y shape wherein each Y shape has a straight leg and two arms extending angularly from one end of said straight leg and said double Y shape is formed by superposing the leg of each Y shape with two angularly extending arms at each end of the superposed legs; each of said second plurality of perforations comprising a linear shape; and said tear line is formed by alternating a double Y shaped perforation and a linear shaped perforation with said superposed legs and said linear shaped perforations being in alignment and forming said fold line.
Claim 3
Dependent Claim
17 words
A carton blank as in claim 1 wherein: said tear line extends generally in a widthwise direction.
Claim 4
Dependent Claim
158 words
A carton comprising: a plurality of panels joined together and folded around a plurality of fold lines to form a carton; at least one of said fold lines joining one panel to another panel comprises a tear line, said tear line comprising a first plurality of perforations and a second plurality of perforations; each of said first plurality of perforations comprising a double Y shape wherein each Y shape has a straight leg and two arms extending angularly from one end of said straight leg and said double Y shape is formed by superposing the leg of each Y shape with two angularly extending arms at each end of the superposed legs; each of said second plurality of perforations comprising a linear shape; and said tear line is formed by alternating a double Y shaped perforation and a linear shaped perforation with said superposed legs and said linear shaped perforations being in alignment and forming said fold line.
Claim 5
Dependent Claim
158 words
A carton comprising: a plurality of panels joined together and folded around a plurality of fold lines to form a carton; at least one of said fold lines joining one panel to another panel comprises a tear line, said tear line comprising a first plurality of perforations and a second plurality of perforations; each of said first plurality of perforations comprising a double Y shape wherein each Y shape has a straight leg and two arms extending angularly from one end of said straight leg and said double Y shape is formed by superposing the leg of each Y shape with two angularly extending arms at each end of the superposed legs; each of said second plurality of perforations comprising a linear shape; and said tear line is formed by alternating a double Y shaped perforation and a linear shaped perforation with said superposed legs and said linear shaped perforations being in alignment and forming said fold line.
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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) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |