Buckles – buttons – clasps – etc. – Zipper or required component thereof – Having interlocking surface with continuous cross section
Patent
1998-01-30
1998-11-17
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Zipper or required component thereof
Having interlocking surface with continuous cross section
24587, 383 63, A44B 2100, B65D 3300
Patent
active
058360573
DESCRIPTION:
BRIEF SUMMARY
This application claims the benefit under 35 U.S.C. .sctn.371 of prior PCT International Application No. PCT/EP96/02357 which has an International filing date of May 31, 1996 which designated the United States of America, the entire contents of which are hereby incorporated by reference.
FIELD OF THE INVENTION
The present invention relates to a device for opening and sealing bags and, more specifically, to a zip for plastic bags as used for packaging candy and other food products. The zip of the present invention is stuck to a bag and can be used for tearing open the initially closed bag. Thereafter, the zip can be used for a multiple opening and closing of the bag.
BACKGROUND OF THE INVENTION
Many food products and a variety of other products are sold and sealed in plastic bags such as candy bags, bags of snacks, instant soup bags, pasta bags and nut bags. This applies also to many powdery substances such as soap powder or construction materials like cement or sand. Furthermore, diapers and toilet paper are often packaged with a plastic bag. However, when the plastic wrappings has been opened or torn, the bag cannot be closed again other than, imperfectly and provisionally, by means of a clip or rubber band.
The present invention provides a solution to this problem in form of special zip (hereinafter called the zipper) that can be attached to the bag and used as a zipper for opening and closing of the bag. Until its first use the bag is completely sealed in the plastic wrapping. After the first opening of the bag, i.e. by tearing the plastic material with the aid of the sharp protrusion on the zipper, the zipper allows a resealing of the bag whereby two plastic strips are latched one to another.
SUMMARY OF THE INVENTION
The present invention relates to a zip for plastic bags comprising a strip of a flexible material which is attached to the opening region of the bag, and flexible material and have a tongue and groove so that the tongue of one of the semi-rigid strips can be inserted into the groove of the other semi-rigid strip thereby latching the semi-rigid strips one to another, slides along the strips, and sealing and opening the bag and for separating the semi-rigid strips and, initially, for tearing open the bag with a sharp protrusion and/or pin which is located on the tip of the tab.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a zipper for plastic bags. The zip comprises one or more strips of some flexible material that can be stuck on the opening region of the bag. Along these flexible strips, which are preferably made of a disposable material, are attached two strips of a semi-rigid material such as rubber or silicon. The semi-rigid strips have a groove and a tongue such that the tongue of one of the strips fits into the groove of the other strip, latching the two strips together. The zipper comprises a clasp that can be moved with the aid of a tab attached to it. This clasp grasps together the two semi-rigid strips, joining or separating them, when sliding along the strips. The tab attached to the clasp is used for moving the clasp along the semi-rigid strips while latching or unlatching the tongue and groove. The tap is preferably provided with a pin or a sharp protrusion on the tip of the tab, which serves for tearing open the bag, i.e. for the initially opening the bag.
The term semi-rigid strips pertains to strips of any semi-rigid plastic material, preferably to silicon strips.
The present invention will now be described in detail with reference to accompanying drawings and representative examples, which are intended to delimit the scope of the invention.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 shows a side view of the two semi-rigid strips attached to the flexible strip.
FIG. 2 is an isometric view of the clasp for joining and separating the semi-rigid strips.
FIG. 3 is a top view of the clasp and the attached tab.
FIG. 4 is a top view of the zipper for opening and closing of plastic bags.
FIG. 5 is a top view of another clasp and tab according to th
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patent: 1719856 (1929-07-01), Sipe
patent: 2665467 (1954-01-01), Bosomworth et al.
patent: 2994469 (1961-08-01), Troup et al.
patent: 5167608 (1992-12-01), Steffens, Jr. et al.
patent: 5211482 (1993-05-01), Tilman
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