EP0263571A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An openable seal line especially for a container
Assignee: Baxter International Inc
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Filing: 1984-09-12
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Granted: —
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Expires: 2004-09-12
Abstract
Abstract A selectively openable seal line (34), especially for a container, comprises a seal (36) between first and second sheets (38, 40) each of which has an inner surface (44, 48) of a thermoplastic material, the seal line being formed between the inner surfaces. The seal is formed by a focused energy source, such as radio-frequency energy source, which melts the inner surface at the seal. The seal, as viewed in cross-section, has a bead area (54) of increased thickness at a break end (56) of the seal coextensive with the inner surfaces along less than all of the surface of the bead area, and a break line (58) inwardly of the break end (56), at the second sheet (40), substantially adjacent the bead area (54), and an arcuate depression (60) having a concave downward surface (62) extending from adjacent the break point to a minimum seal thickness point (64).
Inventors
- 👤 Peter Carveth
- 👤 Edwin Pyde
- 👤 Albert Stone
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 01:51
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/14; A61J1/20; A61J1/2093; B; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C65/76; B29C66/00; B29C66/004; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/133; B29C66/20; B29C66/23; B29C66/232; B29C66/24; B29C66/244; B29C66/32; B29C66/328; B29C66/3284; B29C66/345; B29C66/3452; B29C66/348; B29C66/40; B29C66/41; B29C66/43; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5326; B29C66/53261; B29C66/53262; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72321; B29C66/7234; B29C66/72341; B29C66/72343; B29C66/73; B29C66/735; B29C66/7352; B29C66/73521; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/812; B29C66/8122; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81415; B29C66/81425; B29C66/81427; B29C66/81431; B29C66/83; B29C66/832; B29C66/8322; B65; B65D; B65D81/00; B65D81/32; B65D81/3261; B65D81/3266; A61J1/05; A61J1/10; A61J1/2003; A61J1/202; A61J1/2024; A61J1/2027; B29C2793/00; B29C2793/009; B29C65/74; B29C66/71; B29C66/81419; B29C66/81421; B29C66/81422; B29C66/82; B29C66/826; B29C66/90; B29C66/92; B29C66/929; B29C66/94; B29C66/949; B29K; B29K2023/00; B29K2023/04; B29K2023/08; B29K2023/083; B29K2027/00; B29K2909/00; B29K2909/08; B29L; B29L2031/00; B29L2031/712; B29L2031/7148; Y; Y10; Y10T; Y10T428/00; Y10T428/19
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
174 words
A selectively openable seal line (34) comprising a seal (36) between first and second sheets (38, 40) each of which has an inner surface (44, 48) of a thermoplastic material, said seal line being formed between said inner surfaces, characterised in that said seal is formed by a focused energy source, such as radio-frequency energy source, which melts said inner surfaces at said seal, said formed seal defining, along a cross section taken through said seal line, perpendicular to said seal line: (i) a bead area (54) of increased thickness at a break end (56) of said seal, between said inner surfaces, said bead area of increased thickness coextensive with said inner surface along less than all of the surface of said bead area, (ii) a break line (58) inwardly of said break end (56), at said second sheet (40), substantially adjacent said bead area of increased thickness, and (iii) an arcuate depression (60) having a concave downward surface (62) extending from substantially adjacent said break point to a minimum seal thickness point (64).
Claim 2
Dependent Claim
174 words
A selectively openable seal line (34) comprising a seal (36) between first and second sheets (38, 40) each of which has an inner surface (44, 48) of a thermoplastic material, said seal line being formed between said inner surfaces, characterised in that said seal is formed by a focused energy source, such as radio-frequency energy source, which melts said inner surfaces at said seal, said formed seal defining, along a cross section taken through said seal line, perpendicular to said seal line: (i) a bead area (54) of increased thickness at a break end (56) of said seal, between said inner surfaces, said bead area of increased thickness coextensive with said inner surface along less than all of the surface of said bead area, (ii) a break line (58) inwardly of said break end (56), at said second sheet (40), substantially adjacent said bead area of increased thickness, and (iii) an arcuate depression (60) having a concave downward surface (62) extending from substantially adjacent said break point to a minimum seal thickness point (64).
Claim 3
Dependent Claim
31 words
The seal line as in Claim 1, wherein the thickness of said seal at said break line is at the least not substantially less than the thickness of said second sheet.
Claim 4
Dependent Claim
33 words
The seal line as in Claim 2, said arcuate depression (60) including a concave upward surface (66) extending upwardly from said minimum seal thickness point (64), away from said concave downward surface (62).
Claim 5
Dependent Claim
48 words
The seal line as in Claim 3, further defining a beveled surface (68) defined by the outer surface (50) of the second sheet (40) beyond said concave upward surface (66), the thickness of the seal along said beveled surface increasing to a bevel end (70) of the seal.
Claim 6
Dependent Claim
28 words
The seal line as in any one of Claims 1 to 4, wherein the thickness of said second sheet is less than the thickness of said first sheet.
Claim 7
Dependent Claim
32 words
The seal line as in any one of Claims 1 to 5, wherein said bead area (54) of increased thickness comprises material from both of said first and second sheets (38, 40).
Claim 8
Dependent Claim
25 words
The seal line as in any one of Claims 1 to 6, wherein said break line (58) comprises material only from said second sheet (40).
Claim 9
Dependent Claim
79 words
The seal line as in any one of Claims 1 to 7, further comprising a mirror image seal (36ʹ) substantially identical to said seal (36), said seal and said mirror image seal commencing from a common seal line opening end (94) from which that portion of said seal line defined by said seal and that portion of said seal line defined by said mirror image seal initially extend away from each other at an angle less than 180 degress.
Claim 10
Dependent Claim
37 words
The seal line as in Claim 8, such that said seal break line (58) and a mirror image break line (58ʹ) are separated by said seal arcuate depression (60) and a mirror image seal arcuate depression (60ʹ).
Claim 11
Dependent Claim
38 words
The seal line as in Claim 9, defined about said opening end by an opening seal including an opening arcuate depression substantially wider than, and narrowing into, said seal arcuate depression and said mirror image seal arcuate depression.
Claim 12
Dependent Claim
119 words
A sealing die (52) for making the selectively openable seal line as defined in Claim 1 between first and second sheets (38, 40) by the application of pressure and focused energy from said die, said die comprising: a metal die head (76) having first and second die sides (80, 82) and including (i) a convex rounded projection having a point of maximum projection (84) and merging at one side thereof into said first die side (80) at a first die side end (86) and (ii) a bevel (90) extending from said rounded projection to said second die side (82) at a second die side end (92), said bevel receding from said point of maximum projection in the vertical direction.
Claim 13
Dependent Claim
211 words
A container (100, 192) comprising a pair of sheets (102, 106 and 194, 198) sealed together around their peripheries and being formed with first and second chambers (124, 128 and 212, 214) which may separately store two components (126, 130), and rupturable means (120 and 200) between the chambers to permit communication between the chambers and mixing of the components, characterised in that the container comprises a second diaphragm sheet (104 and 196) between the first (102 and 194) and third (106 and 198) sheets defined by said pair, the second sheet being sealed about at least a portion of its periphery to the first sheet and the third sheet, the rupturable means comprising an externally manually breakable line of securement (120 and 200) between the first sheet and the second sheet, whereby the second chamber is defined by the first and second sheets and the line of securement and the first chamber is defined by the third and second sheets and the line of securement, so that manual separation of the first and second sheets near said line of securement ruptures the latter to open communication between the chambers, wherein the breakable line of securement is defined by a seal line according to any one of Claims 1 to 11.
References Cited (Backward Citations)
No citation records indexed.
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