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(11) Patent Number: 87
 (45) Date of grant: 10/03/2005

(12) PATENT
(51) Int.Cl.7: B 65D 33/22
(21) Application Number: 1998/ 000249
(22) Filling Date: 07/10/1998
 (73) Owner:BAG &BALERS MANFUCTURERS LTD of, P.O.B ox 76529 Nairobi, Kenya
(72) Inventor: Viren Joshi
(74) Agent/address for correspondence: Hamilton Harrison & Mathews„ ICEA Building, Kenyatta Avenue
 
(54) Title: OPEN TOP TEA SACK.
(57) Abstract:
The invention relates to a multilayered tea packaging container in the form of a suck defined by an open top.
 
Open top tea sack
The invention relates to a flexible multi layered tea packaging container in the form of a sack.
When tea is picked it is processed, at tea factories, by various known processes until the tea has been properly conditioned for packaging. When that processing has been completed, it is desirable that the tea should be packaged as soon as possible as it is known that tea exposed to the atmosphere is affected by oxygen in the air.
Previously tea used to be packed in wooden chests. This proved to be bulky in weight and at the expense of our limited forest reserves. The present invention provides a suitable packaging container for packaging tea in tea factories. The container allows between 18 to 22% more tea to be packed in the container as compared to any other form of packaging. The container also provides great saving in packaging cost to the tune of at least 60% over conventional tea packaging methods. While by far the greatest application for the invention is specifically the
packaging of tea, it should be mentioned that the invention is not to be considered as completely limited to the packaging of tea.
The invention relates to a flexible multi layered tea packaging container in the form of a sack defined by an open top, a body and a closed block bottom, the top having an opening for filling the tea. The opening is bounded by end portions at each of its two opposite sides and by two
foldable flaps, one inner and the outer. When the container is filled, the inner flap is first glued to the end portion, then the outer flap is used as a covering flap to completely close the opening.
Brief description of the drawings.
Embodiments of the present invention will now be described herein with reference to the accompanying drawings in which: Fig. 1 shows a perspective view of an empty flexible multi layered packaging container.
Fig. 2 shows a perspective view of a filled flexible multi layered packaging container before it is sealed.
Fig. 3 shows a perspective view of a filled and sealed flexible multi layered packaging container.
Description of preferred embodiments
Referring to the drawings and first to Fig. 1, a flexible multi layered packaging container (10) is shown as an empty packaging in the form of a sack. The container shown consists of an open top, a body (1) and a closed block bottom (4).The container is preferably made up of four plies of extensible Kraft paper, or from four plies of semi-extensible Kraft paper or from four plies of flakt dried Kraft paper, with the inner ply in each case bonded to aluminium foil with low density polyethylene to form a barrier aluminate.
The top has an opening (5) in which tea is filled in from above from free flow hoppers into the opening while the container is held vertically in rigid forming boxes under vibration. The opening is indicated in fig. 1 by the dotted lines (5a, 5b). The opening is bounded by end portions (4) at each of its two opposite sides and by an inner flap (3) and outer flap (2) on the other two opposite sides. Inner flap (3) and outer flap (2) are rectangular in shape and are connected to the body (1) via the fold lines (7, 11) on each opposite side respectively. Both flaps (2, 3) are foldable inwards along the fold lines (7, 11) as illustrated in Fig. 2
The inner flap (3) has, on the inner surface sealing margins (8) along the left and right of its vertical height. After the container is filled, the inner flap is folded inwardly along the fold line (11) and the sealing margins so glued to the end portions (4) to partially seal the opening (5).
The outer flap is rectangular in shape and is provided with a sealing strip (9) along the inner surface.
The container is provided in the shape shown in fig. 1. To fill it, the container is held vertically in rigid forming boxes under vibration while tea is charged from free flow hoppers into the opening (5) of fig.1 as defined by the dotted lines (5a, 5b). As tea is charged into the sack, the body (1) expands to finally assume the shape illustrated in Fig. 2. When the sack is completely filled, the inner flap is first folded inwardly along the fold line (11) and the sealing margins (8) glued to the end portions (4) to partially seal the opening (5). The outer flap (2) is then folded inwardly along its fold line (7) and the sealing strip (9) glued on top of the inner flap to completely close the opening. The width of the outer flap is the same as that of the overall container such that when the flap is folded and glued, it lies flush with the fold line (11) of the inner flap and acts as a covering flap. The filled container then assumes a box like shape in its filled state (as illustrated in fig. 3) which ensures suitability for containerized transportation.
 
CLAIMS
1.A flexible multi layered tea packaging container in the form of a sack defined by an open top, a body and a closed block bottom, the top having an opening for filling, wherein the opening is bounded by end portions at each of its two opposite sides and by an inner foldable flap and an outer foldable flap on the other two opposite sides.
2. A flexible multi layered tea packaging according to claim 1, wherein the inner foldable flap has sealing margins on the inner surface along is    the left and right of its vertical height.
3. A flexible multi layered tea packaging according to claim 1, wherein the width of the outer flap is the same as that of the overall container such that when the flap is folded and glued, it lies flush with the fold line of the inner flap.
4. A flexible multi layered tea packaging according to claim 1 or 3, wherein the width of the outer flap is the same as that of the overall container such that when the flap is folded and glued, it acts as a covering flap.
5. A flexible multi layered tea packaging according to claim 1, wherein the outer flap is provided with a sealing strip (9) along the inner surface.

6. A flexible multi layered tea packaging container according to claim 1, wherein the multilayer is preferably made up of four plies of Kraft paper with the inner ply bonded to an aluminium foil with low density polyethylene to form a barrier aluminate.

7. A flexible multi layered tea packaging container according to claim 1, wherein the multilayer is preferably made up of four plies of extensible semi-extensible Kraft paper with the inner ply bonded to an aluminium foil with low density polyethylene to form a barrier aluminate.
 
8. A flexible multi layered tea packaging container according to claim 1, wherein the multilayer is preferably made up of four plies of flakt dried Kraft paper, with the inner ply bonded to an aluminium foil with low density polyethylene to form a barrier aluminate.
9. A flexible multi layered packaging container according to any of the preceding claims, wherein the contents is tea.
Abstract
The invention relates to a flexible multi layered tea packaging container(10) in the form of a sack defined by an open top, a body(1) and a closed block bottom(6), the top having an opening (5) for filling the tea. The opening(5) is bounded by end portions (4) at each of its two opposite sides and by two foldable flaps, one inner (3) and the outer (2). When the container is filled, the inner flap (3) is first glued to the end portion and the outer flap (2) is used as a covering flap to completely close the opening (5).

 

 

 

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