EP0276554A2
Expired / Lapsed
EP
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Bag with resealable closure and a method of manufacturing same
Assignee: FUJITOKUSHU SHIGYO Co Ltd
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Filing: 1987-12-09
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Granted: —
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Expires: 2007-12-09
Abstract
Abstract A plastics bag (1) includes a closure means (2) formed from a tape which has been folded into a U-shape about a medial part. The tape includes co-operating profiled strips (3) one of male and the other of female form which engage to form a resealable closure. The free sides (2a) of the tape are heat sealed to the top free edges (1a) of the bag (1). The bag is manufactured by feeding sheet material (1ʹ) to a mandrel (11) and simultaneously feeding the closure tape (2) after bending in a former (7) and engaging the closure parts (3) by rollers (8) between the overlapping free sides of the tape (2 ). The tape (2) is heat sealed to the bag material 1ʹ by means of heat sealing bars (13) and the cylindrical assembly is then heat sealed laterally by means of further heat sealing bars (14). The bag is filled by passing contents down a chute (15) through the middle of the mandrel (11) and by this means forming, filling and closing of the bag may all be carried out as a stepwise automatic operation. The bags are separated by cutting through the central portion of the heat seal along X-X.
Inventors
- 👤 Hiromichi Inagaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65B; B65B9/00; B65B9/10; B65B9/20; B65B61/00; B65B61/18; B65B61/188; B65B9/213; B65D33/25; B65D33/2508; B65D33/2516; B65D33/2533; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/813; B31B70/8131; B31B70/8132
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
A bag with a resealable closure wherein the bag (05) includes profiled strip members (01, 03) positioned respectively along the inside of the open mouth parts of the bag, the strip portions (01, 03) having complementary mutually engaging profiled portions (02, 04) whereby the strips may be pressed together to seal the bag and pulled apart to enable the contents to be removed, characterised by a closure tape (2) of U-shape and provided with mutually engaging profiled portions (4, 5) forming a closure (3), the free edges (2a) of the tape being heat sealed to the open mouth (1a) of a bag (1).
Claim 2
Dependent Claim
103 words
A bag with a resealable closure wherein the bag (05) includes profiled strip members (01, 03) positioned respectively along the inside of the open mouth parts of the bag, the strip portions (01, 03) having complementary mutually engaging profiled portions (02, 04) whereby the strips may be pressed together to seal the bag and pulled apart to enable the contents to be removed, characterised by a closure tape (2) of U-shape and provided with mutually engaging profiled portions (4, 5) forming a closure (3), the free edges (2a) of the tape being heat sealed to the open mouth (1a) of a bag (1).
Claim 3
Dependent Claim
62 words
A bag in accordance with Claim 1 wherein the closure (2) comprises a tape with longitudinally extending profiled portions (4, 5) integral therewith, the male portion (4) comprising an elongate ridge and the female portions (5) comprising an elongate channel arranged so that when the tape (2) is folded about the longitudinally extending medial line the ridge (4) and channel (5) engage.
Claim 4
Dependent Claim
14 words
A bag wherein the sides thereof are closed by a heat sealing operation (6a).
Claim 5
Dependent Claim
14 words
A bag wherein the sides thereof are closed by a heat sealing operation (6a).
Claim 6
Independent Claim
132 words
A method for the manufacture of a bag having a resealable closure, the closure comprising elongate complementarily profiled engaging strips located along an open side forming the mouth of the bag, characterised by a sheet member (1ʹ) being conformed around a mandrel (11) whereby free sides (1a) of the sheet (1ʹ) are brought together into juxtaposed relationship, a closure tape member (2) including longitudinally extending complementary engaging profiled strips (4, 5) being conformed to a U-shape with the strips (4 and 5) being engaged to form a closure (3), the free sides (2a) of the closure strip being brought into side by side relationship with respective sides (1a) of the sheet (1ʹ) and thereafter heat sealed, the tubular assemblage thus formed being heat sealed transversely at regular intervals to form a bag.
Claim 7
Independent Claim
132 words
A method for the manufacture of a bag having a resealable closure, the closure comprising elongate complementarily profiled engaging strips located along an open side forming the mouth of the bag, characterised by a sheet member (1ʹ) being conformed around a mandrel (11) whereby free sides (1a) of the sheet (1ʹ) are brought together into juxtaposed relationship, a closure tape member (2) including longitudinally extending complementary engaging profiled strips (4, 5) being conformed to a U-shape with the strips (4 and 5) being engaged to form a closure (3), the free sides (2a) of the closure strip being brought into side by side relationship with respective sides (1a) of the sheet (1ʹ) and thereafter heat sealed, the tubular assemblage thus formed being heat sealed transversely at regular intervals to form a bag.
Claim 8
Dependent Claim
37 words
A method in accordance with Claim 4, wherein the bag is filled by introducing contents through the centre of the mandrel (11), individual bags being separated by severing along a median line through the transverse heat seal.
Claim 9
Dependent Claim
63 words
A method in accordance with Claim 4 or 5, carried out stepwise wherein the tape is heat sealed to the sheet material by a longitudinally extending heat sealing means simultaneously with heat sealing in the transverse direction, the assembly thereafter being moved a distance corresponding to the selected bag width, the bag then being filled with contents and the heat sealing operation repeated.
Claim 10
Dependent Claim
44 words
A method of making a bag in accordance with any preceding Claim 4 to 6, wherein the sides of the sheet (1ʹ) are overlapped and engaged with the closure tape on a plane extending generally at a tangent to the surface of the mandrel.
Claim 11
Dependent Claim
42 words
A method in accordance with any preceding Claim 4 to 6, wherein the sides of the sheet (1ʹ) are overlapped and engaged with the closure tape (2) in a plane generally extending in a radial direction with respect to the mandrel (11).
Claim 12
Dependent Claim
34 words
A method in accordance with any preceding Claim 4 to 7, wherein the free sides (2a) of the closure tape are engaged to the outside of the free sides (1a) of the sheet (1).
Claim 13
Dependent Claim
36 words
A method of manufacturing a bag in accordance with any preceding Claim 4 to 8, wherein the free sides (2a) of the closure tape (2) are engaged between the free sides (1a) of the sheet (1ʹ).
Claim 14
Dependent Claim
42 words
A method in accordance with any preceding Claim 4 to 10, wherein a heat insulating member (12 is positioned between the respectively engaged sides (1a) of the sheet (1ʹ) and (2a) of the closure tape (2) prior to the heat sealing operation.
References Cited (Backward Citations)
No citation records indexed.
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