Abstract

Preformed bag for packaging food products, made up of a front face and a rear face that are formed from a web that is folded to form the lower edge (103), the upper edge of said bag forming the opening having a lip (111). The web is a composite web (250) comprising transparent films (150) that form the interior of the bag, and a longitudinal strip of paper (200) that is adhesively bonded to the film (150) in order to externally cover the web, and is cut (225) in order to produce the window (125) and subsequently coated with adhesive before being applied to the transparent film (150).

IPC Classes  ?

• B65D 30/08 - Sacks, bags or like containers characterised by the material used with laminated or multiple walls in spaced face-to-face relationship, e.g. double walls
• B65D 33/04 - Windows or other apertures, e.g. for viewing contents
• B65D 33/20 - End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive

Abstract

Preformed packaging bag for food products, produced from a web that is folded to form the lower edge of the bag and is welded at the two edges that connect the rear face and the front face. The composite web (250) comprises a transparent film (150) that forms the interior of the bag (100) and a transverse strip of paper (200) that is adhesively bonded to the film in order to externally cover the width (ℓ) of the bag (100) continuously over a height running from the rear face (110) to the turnup (104) beyond the bottom fold (130), and an auxiliary transverse strip of paper (220) that is adhesively bonded to the film (150) in order to cover the top of the front face (120), including the lip (121).

IPC Classes  ?

• B65D 30/08 - Sacks, bags or like containers characterised by the material used with laminated or multiple walls in spaced face-to-face relationship, e.g. double walls
• B65D 33/04 - Windows or other apertures, e.g. for viewing contents
• B65D 33/20 - End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive

Abstract

A preformed packaging sachet provided with a closing device for receiving products, namely food products, first and second faces bounding an opening; a first lip on the first face that occupies the entire length of the opening; an adhesive-coated strip on the first lip (5) that occupies the entire length (L) of the opening (O); a removable protective strip (8) covering the adhesive strip (7); a second lip on the second face that occupies the entire length (L) of the opening and that is folded against the second face of the sachet (S); wherein in use the protective strip is arranged to be removed and the second lip (6) is arranged to be folded out to enable adhesive bonding of the second lip (S) with the adhesive strip on the first lip (5) in order to close the sachet.

IPC Classes  ?

• B65D 33/20 - End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive
• B65D 75/30 - Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
• B65D 75/64 - Tabs formed by unsecured portion of wrapper