CA2254320A1

CA2254320A1 - Ez-use bags

Info

Publication number: CA2254320A1
Application number: CA 2254320
Authority: CA
Inventors: Richard Y. C. Lam; Bridget G. Lam
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-04
Filing date: 1998-12-04
Publication date: 2000-06-04

Abstract

A continuous roll of plastic bags is formed from a flattened elongate tube of suitable material such as a thermoplastic. The roll may be separated along a first straight perforated line separator disposed between two seals which close the tube to form the bottom of each bag.
The roll may also be separated along a second separator which comprises first and second perforated lines which are substantially sinusoidal or wavy and intersect at least once.
Preferably, the first line is the inverse of the second line. The first and second separators are alternated along the roll.

Description

November 20 1998 EZ-USE BAGS
Rolls of packaging bags which are generally mounted on a dispenser permits the user to tear off a bag, one at time, along a straight perforated line.
By this method, the user is subjected to normal and frequent problems such as the following:
1 identifying which end of the bag is the opening 2 once the opening is finally located, the user experiences the added problem of separating the two layers of this material at the opening 3 once the bag is opened, the user then needs to close the opening after filling the bag with the desired items by using a fastener device such as a twist tie, strap or similar gadget. These fasteners are obtained from a separate container which are often empty or not readily available in the areas where the bags are dispensed This invention will permit the user to tear off a bag, identify the opening, open and fill the bag and close the opening more easily than the traditional method.
This invention relates to the method of dispensing packaging bags by permitting the user to tear off a bag, one at a time, from the dispenser. The unevenness of the opening will permit the user to easily identify the opening. The wave design of the opening produces two single-layer protruding edges. This allows for easy separation by pulling the protruding single-layer edges of the opening. In addition, the design of the opening of the bag with its two protruding edges, permits the user to tie the bag closed without resorting to the use of additional fastening devices.
It is the current practice for these bags to be dispensed in a roll with a straight line perforation and one parallell seam establishing the outside boundaries of each bag. The user has to pull the bag off, one at a time, identify the opening and separate the two layers of the material at the opening which are generally stuck together and, when the bag is filled, to search for a fastener to secure the opening.
I have found these disadvantages can be easily overcome by separating the bags with a wave-shaped perforation for the two connected and consecutive openings. The corresponding bottoms of the bags are separated by two parallell straight seams or heat seals with a perforated straight line equidistant between these two seams.
The wave-shaped design of the opening permits the user to identify the opening of the bag once torn off the roll while the protruding edges of the opening allows the bag to be opened easily. The protruding edges can be used to tie the opening once the bag is filled, thus eliminating the need to provide other closing devices and the dispenser to contain these closing devices.

This design encompasses variations in sizes of the bag, types of pliable soft material, color of the material, shapes of the bag. etc.
In addition. the uneven opening of the bag can have a variation of different shapes providing the protruding edges are uneven enough to allow for the separation of the opening of the bag easily. Consequently, the shape of the protrusions may differ without compromising its design purpose. Tearing off a bag from a roll suspended on a dispenser adds to the efficiency but is not entirely necessary.

Claims

1. A continuous roll comprising an elongate flattened tube of a thermoplastic material, separatabLe into a plurality of thermoplastic bags; said roll comprising a first layer and a second layer; said roll having a plurality of first separators each comprising two seals where the first and second layers are fused together along a line substantially orthogonal to the longitudinal axis of the tube and the two seals are separated by a perforated line across both first and second layers; said roll further having a plurality of second separators comprising a first perforated line across the first layer and a second perforated line across the second layer wherein the first and second perforated lines do not overlap; wherein said first and second separators are spaced apart and alternate along the length of the roll.

2. The roll of claim 1 wherein the first and second perforated lines are substantially sinusoidal lines that intersect at least once.

3. The roll of claim 2 wherein the first perforated line is the inverse of the second perforated tine.

4. A plurality of thermoplastic bags joined together into an elongate continuous flattened tube having a first layer and a second layer wherein:
(a) ~each bag has a closed end and a mouth;
(b) ~each closed end abuts the closed end of an adjacent bag;
(c) ~each mouth abuts the mouth of an adjacent bag;
(d) ~each pair of closed ends is separatable along a perforated line that is orthogonal to the longitudinal axis of the tube and positioned between the closed ends;
and (e) ~each pair of mouths is separatable along a first perforated line in the first layer and a second perforated line in the second layer where the first perforated line does not overlap the second perforated line.

5. The plurality of thermoplastic bags of claim 4 wherein the first and second perforated lines separating the mouths of adjacent bags are substantially sinusoidal lines that intersect at least once.

6. The plurality of thermoplastic bags of claim 5 wherein the first perforated line is the inverse of the second perforated line.