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Single-lobe filter bag for infusion products

a filter bag and single-chamber technology, applied in the field of single-chamber filter bags for infusion products, can solve the problems of poor infusion quality and longer infusion time, lack of three-dimensional or volumetric properties, and misshapen surface of filter bags, so as to improve the overall quality of infusion.

Inactive Publication Date: 2009-10-22
IMA FLAVOUR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The patent describes a new type of single-lobe filter bag for infusion products that solves problems with existing bags. The new bag has a stiffer structure that meets market requirements and improves the quality of the infusion and the filter bag. This is achieved by providing a specific technical feature that enhances the overall quality of the product."

Problems solved by technology

Continuing its policy of product improvement, however, the Applicant has noticed that current filter bags, especially single-lobe bags (which this invention is concerned with in particular) have inherent shortcomings due to their shape which, precisely because they have a single chamber, tend to lack adequate three-dimensional, or volumetric, properties.
The resulting disadvantages are that:
the product is more constrained within the bag, with less room to expand during infusion, which means poorer quality infusions and longer infusion times;
flattening causes the surfaces of the filter bags to become misshapen;
the filter bags are more difficult to pack on account of possible movements during positioning.
Flattening and movement of the filter bags may damage and reduce the overall quality of the product contained.
Moreover, it should also be noticed that a loose (that is, single) filter bag will not stand erect for display purposes (during presentation and selection), unlike other types of filter bag, such as tetrahedral or pyramidal bags which, however, are much more expensive than single-lobe bags.

Method used

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  • Single-lobe filter bag for infusion products
  • Single-lobe filter bag for infusion products
  • Single-lobe filter bag for infusion products

Examples

Experimental program
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first embodiment

[0035]More specifically, in the first embodiment illustrated in FIGS. 1 to 4, the ends of each of the two second edges 7a and 7b closer to the sides 8 and 9 are partially folded towards the inside of the chamber 3 to form a bevelled shape and are flattened on the corresponding area of the other edge 7a or 7b in such a way as to create the stiff supporting base 11 at the second end 7.

[0036]In the third embodiment (see FIGS. 12 to 16), the second edges 7a and 7b define a central extension of the second bottom end 7. The second edges 7a and 7b are folded face to face onto each other and joined in such a way as to form a tab 12 protruding from the bottom supporting base 11 that is elastically compliant in such a way as to be folded onto the bottom base 11 to increase its stiffness.

[0037]Alternatively, the tab 12 may be folded and joined stably by a seal S4 to the bottom supporting base 11, thus forming a larger, stiff longitudinal area (see FIGS. 17 to 20).

second embodiment

[0038]In the second embodiment illustrated in FIGS. 6 to 10, the two ends of each of the second edges 7a and 7b are folded towards the first end 5, which is placed over the respective end of the other edge 7a or 7b and at the respective bottom ends 8a, 8b and 9a, 9b of the connecting sides 8 and 9 (initially open) of the length 2 in such a way as to form a bevelled shape.

[0039]Each pair of ends of the second edges 7a and 7b is reciprocally joined by a seal S2 at the respective bottom areas of the connecting sides 8 and 9: this creates a stiff lateral area of the length 2 in order to form wide supporting shoulders for the closed bottom supporting base 11 of the filter bag 1.

[0040]In this specific case, the seal S2 is simultaneously made also on the substantially central area of each side 8, 9 in order to also join the latter which, as stated, are initially open, in the configuration in which they are folded towards the inside of the chamber 3.

[0041]In addition to the above, the filte...

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Abstract

A single-lobe filter bag for infusion products comprises a length (2) of filter material forming a chamber (3) containing a charge (4) of the infusion product. The length (2) comprises: a first closed top end (5) formed by a first join (S1) between two first end edges of the length (2); a second closed bottom end (7) and two sides (8, 9) connecting the two ends (5, 7) of the length (2); the two sides (8, 9) connecting the first and second edges (5, 7) are at least partly folded onto each other to form a fold towards the inside of the chamber (3) and the second bottom end (7) of the filter bag (1) is closed by second join (S2) designed to form a rigid flat bottom surface (11) of the filter bag (1) such as to define a stable base, with a substantially triangular cross section, for supporting the filter bag (1).

Description

TECHNICAL FIELD[0001]This invention relates to a single-lobe or single-chamber filter bag for infusion products, such as tea, coffee, camomile and the like.BACKGROUND ART[0002]The current market offers many different kinds of filter bags (or tea bags) for infusing the above mentioned products in water.[0003]The wide range of filter bags currently available is the result of the increasingly widespread use and popularity of filter bags among consumers, both in the home and in public places, which has led to a growing demand, especially from product distributors, for diversification of filter bag designs with a view to obtaining filter bags with improved properties in terms of product containment, ease of exchange with the liquid during infusion, shelf life, ease of final packaging, and so on.[0004]The two main designs currently used are the traditional single-lobe bags (usually with tie string and tag) and the now well-established two-lobe bags (also with tie string and tag, with or w...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65B29/02
CPCB65D85/812B65D85/808
Inventor REA, DARIOCAROLI, RODOLFORIVOLA, SAURO
Owner IMA FLAVOUR
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