US3899120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paperboard blank with crushed offset flap edges and method for forming same
Assignee: OI Glass Inc
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Filing: 1974-06-03
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Granted: 1975-08-12
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Expires: 1994-06-03
Abstract
Abstract An improved paperboard blank having offset slits and an adjacent crushed area. A paperboard blank is formed with flaps attached to main panels along fold lines. The flaps are separated from one another by slit lines which are offset from the foldable connections of the main panels. A crush line, which is approximately twice as wide as the amount of offset of the offset slits, extends substantially coextensively with the slit lines. The crush line defines an area which is substantially thinner than the original thickness of the paperboard material. In addition, fold lines adjacent to those flaps which are folded first may be made deeper than other fold lines to aid in easy erection of the blank into a carton. The method for forming the blank is also disclosed.
Inventors
- 👤 Eli H Fradkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:53
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/02; B65D5/06; B31; B31B; B31B50/00; B31B50/25; Y; Y10; Y10S; Y10S229/00; Y10S229/93; Y10S229/939
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
In a paperboard blank particularly adapted for use with an automatic erection machine and foldable into a tubular configuration of the type wherein flaps are connected to at least one main panel along fold lines and wherein said flaps are separated from one another by offset slit lines extending from the fold line connecting said flaps to said main panel to the outer marginal edge of said flaps, the improvement in said blank which comprises: a crush line, substantially coextensive with said offset slit lines, said crush line defining an area of said paperboard blank that is substantially thinner than the original thickness of said paperboard blank and at least twice as wide as the amount of offset of said offset slit lines.
Claim 2
Dependent Claim
123 words
In a paperboard blank particularly adapted for use with an automatic erection machine and foldable into a tubular configuration of the type wherein flaps are connected to at least one main panel along fold lines and wherein said flaps are separated from one another by offset slit lines extending from the fold line connecting said flaps to said main panel to the outer marginal edge of said flaps, the improvement in said blank which comprises: a crush line, substantially coextensive with said offset slit lines, said crush line defining an area of said paperboard blank that is substantially thinner than the original thickness of said paperboard blank and at least twice as wide as the amount of offset of said offset slit lines.
Claim 3
Dependent Claim
27 words
The improvement of claim 1, wherein said crush line defines an area that is between 20 and 50% thinner than the original thickness of said paperboard blank.
Claim 4
Dependent Claim
49 words
The improvement of claim 1 which further includes: at least one fold line in said blank that is substantially deeper than the remainder of said fold lines, said one fold line connecting the first of said flaps to be folded by an automatic erection machine to said main panel.
Claim 5
Dependent Claim
23 words
The improvement of claim 3, wherein said deeper fold line is from 15 to 35% deeper than the remainder of said fold lines.
Claim 6
Dependent Claim
40 words
The improvement of claim 1, wherein said blank comprises: a plurality of main body panels connected along fold lines and a plurality of end closure flaps connected to the lower marginal edge of said main body panels along fold lines.
Claim 7
Dependent Claim
28 words
The improvement of claim 1, wherein said blank comprises: a single main panel and a plurality of flaps surrounding said main panel and connected thereto along fold lines.
Claim 8
Dependent Claim
107 words
In a method for forming a paperboard blank of the type foldable into a tubular configuration, wherein fold lines are impressed into said paperboard to separate flaps from at least one main panel and, wherein offset slit lines are formed in said paperboard to separate said flaps from one another, the improvement in said method which comprises the step of: crushing said paperboard, along substantially the entire length of each of said offset slit lines, to a thickness that is substantially less than the original thickness of said paperboard in an area at least twice as wide as the amount of offset of said offset slit lines.
Claim 9
Dependent Claim
107 words
In a method for forming a paperboard blank of the type foldable into a tubular configuration, wherein fold lines are impressed into said paperboard to separate flaps from at least one main panel and, wherein offset slit lines are formed in said paperboard to separate said flaps from one another, the improvement in said method which comprises the step of: crushing said paperboard, along substantially the entire length of each of said offset slit lines, to a thickness that is substantially less than the original thickness of said paperboard in an area at least twice as wide as the amount of offset of said offset slit lines.
Claim 10
Dependent Claim
25 words
The improved method of claim 7, wherein said crushing is to a thickness between 80 and 50% of the original thickness of said paperboard blank.
Claim 11
Dependent Claim
48 words
The improved method of claim 7, which further includes the step of: scoring the fold line connecting at least the first of said flaps to be folded to said main panel to a depth greater than the depth to which the remainder of said fold lines are scored.
Claim 12
Dependent Claim
31 words
The improved method of claim 9, wherein said scoring is at a depth between 15 and 35% greater than the depth to which the remainder of said fold lines are scored.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |