US4670352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tearable structure
Assignee: CANADA CUP Inc A CORP OF CANADA
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Filing: 1986-10-06
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Granted: 1987-06-02
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Expires: 2006-10-06
Abstract
Abstract A method for tearing a thin sheet material and a tearable thin sheet material having a predetermined tear line wherein the material is corrugated along a predetermined tear line to be torn. The corrugations have at least one edge, a base and an apex and the material is torn along said edge.
Inventors
- 👤 John H. Kurz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:29
CPC Classifications
B; B65; B65D; B65D43/00; B65D43/02; B65D43/0235; B65D43/0264; B65D43/0268; B65D2401/00; B65D2401/15; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00046; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00342; B65D2543/00398; B65D2543/00407; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/00509; B65D2543/00537; B65D2543/00555; Y; Y10; Y10S; Y10S229/00; Y10S229/927; Y10T; Y10T225/00; Y10T225/10; Y10T225/12; Y10T428/00; Y10T428/12; Y10T428/12188; Y10T428/1241; Y10T428/15
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
94 words
A method for tearing a thin sheet material along a predetermined line which comprises: providing a thin sheet of orientable material; orienting the said sheet uniaxially along a predetermined line to be torn; providing a marginal edge in said material; providing means in said marginal edge adjacent the area of said orientation and adjacent said edge for directing a tear towards the area in which said orientation commences; and tearing said material along said line of orientation including starting the tear from said means, to provide a clean tear along the said predetermined line.
Claim 2
Independent Claim
94 words
A method for tearing a thin sheet material along a predetermined line which comprises: providing a thin sheet of orientable material; orienting the said sheet uniaxially along a predetermined line to be torn; providing a marginal edge in said material; providing means in said marginal edge adjacent the area of said orientation and adjacent said edge for directing a tear towards the area in which said orientation commences; and tearing said material along said line of orientation including starting the tear from said means, to provide a clean tear along the said predetermined line.
Claim 3
Dependent Claim
64 words
A method according to claim 1 wherein a plurality of corrugations are formed along a predetermined line to be torn, wherein said corrugations have at least one edge, a base and an apex, wherein the means in said marginal edge is adjacent a first of said corrugations for directing a tear towards said corrugations, and tearing said material along said edge of said corrugations.
Claim 4
Dependent Claim
12 words
A method according to claim 1 wherein said means is a tab.
Claim 5
Dependent Claim
12 words
A method according to claim 1 wherein said means is a notch.
Claim 6
Dependent Claim
12 words
A method according to claim 2 wherein said material is a plastic.
Claim 7
Dependent Claim
14 words
A method according to claim 5 wherein said material is a thermoformed container lid.
Claim 8
Dependent Claim
19 words
A method according to claim 2 wherein the angle between the base and the apex does not exceed 90°.
Claim 9
Dependent Claim
20 words
A method according to claim 2 wherein the angle between the base and the apex lies between 15° and 40°.
Claim 10
Dependent Claim
26 words
A method according to claim 1 wherein said sheet is oriented uniaxially along a predetermined line to be torn by stretching predominantly in a single direction.
Claim 11
Dependent Claim
18 words
A method according to claim 1 wherein said orientation enhances resistance to surface pressure without weakening the structure.
Claim 12
Dependent Claim
27 words
A method according to claim 1 wherein said uniaxial orientation includes preferentially aligning the molecules of said sheet material in a single direction along said predetermined line.
Claim 13
Dependent Claim
54 words
A tearable thin sheet material having a predetermined tear line which comprises: a thin sheet of orientable material having a marginal edge; uniaxial orientation in said sheet along a predetermined line to be torn; means in said marginal edge adjacent the area of orientation to provide a clean tear line along said predetermined line.
Claim 14
Dependent Claim
54 words
A tearable thin sheet material having a predetermined tear line which comprises: a thin sheet of orientable material having a marginal edge; uniaxial orientation in said sheet along a predetermined line to be torn; means in said marginal edge adjacent the area of orientation to provide a clean tear line along said predetermined line.
Claim 15
Dependent Claim
77 words
A sheet material according to claim 12 including a plurality of corrugations in said material along a predetermined line to be torn with a first of said corrugations adjacent said marginal edge, wherein said corrugations have at least one edge, a base and an apex, wherein the means in said marginal edge is adjacent a first of said corrugations and adjacent said edge of said first corrugation to provide a clean tear line along said predetermined line.
Claim 16
Dependent Claim
12 words
A material according to claim 12 wherein said means is a tab.
Claim 17
Dependent Claim
12 words
A material according to claim 12 wherein said means is a notch.
Claim 18
Dependent Claim
13 words
A material according to claim 13 wherein said material is a rigid plastic.
Claim 19
Dependent Claim
14 words
A material according to claim 17 wherein said material is a thermoformed container lid.
Claim 20
Dependent Claim
13 words
A material according to claim 12 wherein said material is a flexible plastic.
Claim 21
Dependent Claim
12 words
A material according to claim 12 wherein said material is aluminum foil.
Claim 22
Dependent Claim
19 words
A material according to claim 13 wherein the angle between the base and the apex does not exceed 90°.
Claim 23
Dependent Claim
20 words
A material according to claim 13 wherein the angle between the base and the apex lies between 15° and 40°.
Claim 24
Dependent Claim
26 words
A material according to claim 12 wherein said sheet is oriented uniaxially along a predetermined line to be torn by stretching predominantly in a single direction.
Claim 25
Dependent Claim
18 words
A material according to claim 12 wherein said orientation enhances resistance to surface pressure without weakening the structure.
Claim 26
Dependent Claim
28 words
A material according to claim 12 wherein said uniaxial orientation includes preferential alignment of the molecules of said sheet material in a single direction along said predetermined line.
References Cited (Backward Citations)
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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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |