Buckles – buttons – clasps – etc. – Zipper or required component thereof – Having interlocking surface with continuous cross section
Patent
1999-05-17
2000-07-18
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Zipper or required component thereof
Having interlocking surface with continuous cross section
24400, 24587, A44B 1900, A44B 2100, B65D 3300
Patent
active
060888873
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to the field of bags having complementary closure strips actuated by a cursor both for opening and for closing.
Such bags are described, for example, in the following documents: EP-A-0 479 661, EP-A-0 102 301, EP-A-0 051 010, U.S. Pat. No. 5,007,143, U.S. Pat. No. 5,007,142, U.S. Pat. No. 5,063,644, EP-0051010, EP-0102301, U.S. Pat. No. 5,405,478, and WO94/28752.
Those bags have already given good service.
The cursor makes bags easier to open and close. The presence of the cursor is particularly appreciated by people who are old or visually handicapped.
However, most known bags with cursors do not give full satisfaction. In particular, most such bags do not provide complete sealing when the strips are in the closed position. This lack of sealing is due to the fact that the strips stay apart ahead of the cursor.
Nevertheless, sealing is required in numerous applications, particularly but not exclusively, for bags that are used for deep freezing food.
Attempts have been made to remedy that drawback by proposing closure strips having a local discontinuity in the vicinity of the end which receives the cursor when the bag is in its closed position, such that the cursor penetrates into said discontinuity and makes it possible, in the closed position, for the strips to engage properly over their entire length.
Nevertheless, the means described in those documents are very complex. They also suffer from the major drawback of not retaining the cursor reliably and consequently of running the risk of the cursor being swallowed by a small child, for example.
An object of the present invention is to improve bags having closure strips that are actuated by a cursor so as to improve the sealing thereof.
Other objects of the present invention are to provide means that are simple and that ensure that the cursor is retained reliably.
In the context of the present invention, these objects are achieved by a bag having complementary closure strips actuated by cursor, the bag being characterized by the fact that it comprises means adapted to ensure sealing between the inside walls of the bag when the bag is in its closed position, said means being in the zone of the bag underlying the strips at their end that receives the cursor in the closed position.
In a first embodiment of the present invention, the means for ensuring sealing are formed by heat sealing between the inside walls of the bag in the zone underlying the strips at their end that receives the cursor in the closed position. The heat sealing is preferably formed between the webs of the strips.
In a second embodiment of the present invention, the means for providing sealing are formed by a projection between the inside walls of the bag in the zone underlying the strips at their end that receives the cursor in the closed position. The projection is preferably formed on a strip support web.
In a third embodiment of the present invention, the means for providing sealing are performed by clip means provided on the cursor, adapted to clip together the zone underlying the strips at their end that receives the cursor in the closed position.
In a fourth embodiment, the means for providing sealing are formed by a closure or a baffle situated beneath the first closure adjacent to the mouth of the bag and closed by action of the cursor, the end of the second closure or baffle corresponding to the cursor in the closed position being heat sealed to provide sealing.
Other characteristics, objects, and advantages of the present invention appear on reading the following detailed description with reference to the accompanying drawings given as non-limiting examples, and in which:
FIG. 1 is a fragmentary side view of the mouth of a bag constituting a first embodiment;
FIGS. 2 and 3 are cross-section views of two variants of the mouth;
FIGS. 4 and 5 are cross-section views of the mouths of bags forming two variants of a second embodiment of the present invention;
FIG. 6 is a cross-section view of the mouth of a bag constituting a third embodiment of the prese
REFERENCES:
patent: 2606352 (1952-08-01), Wende
patent: 3122807 (1964-03-01), Ausnit
patent: 3220076 (1965-11-01), Ausnit et al.
patent: 3259951 (1966-07-01), Zimmerman
patent: 5067208 (1991-11-01), Herrington, Jr. et al.
patent: 5198055 (1993-03-01), Wirth et al.
patent: 5216787 (1993-06-01), Custer et al.
patent: 5442837 (1995-08-01), Morgan
patent: 5664299 (1997-09-01), Porchia et al.
Flexico-France
Sakran Victor N.
LandOfFree
Bags comprising matching closure profiles actuated by slider does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bags comprising matching closure profiles actuated by slider, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bags comprising matching closure profiles actuated by slider will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2023994