Liquid purification or separation – Filter – Resting on supporting receiver – e.g. – portable
Patent
1996-01-31
1998-04-07
Walker, W. L.
Liquid purification or separation
Filter
Resting on supporting receiver, e.g., portable
2104972, 2104973, 99295, 426 77, 426 82, B01D 29085
Patent
active
057360421
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a filter particularly suitable to make coffee or tea.
BACKGROUND ART
A conventional disposable filter used to make a cup of coffee comprises a pair of substantially fan-shaped filter sheets laid one upon another and bonded to each other along their opposite side edges as well as along their bottom edges so as to form a bag in an inverted cone-shape as their arc-shaped free edges are spaced from each other. Such a bag is usually received by a substantially similar shaped cup used in combination with such a filter. Then, a desired quantity of coffee powder is introduced into the bag and hot water is poured onto the coffee powder so that coffee drips to the cup bottom.
When the known filter is used to make coffee, a quantity of coffee soaking out through a peripheral wall of the filter inevitably flows along an inner wall of the foresaid cup used in combination with the filter down to the bottom of this cup. However, coffee is sometimes unacceptably cooled by contact with this cup and must be reheated by a coffee server. This reheating is troublesome task.
Accordingly, it is a principal object of the invention to solve the foresaid problem by forming a pair of pockets adjacent the opening of the inverted cone-shaped filter allowing a separately prepared hanger to be assembled in the filter.
SUMMARY OF THE INVENTION
The object see forth above is achieved, according to the invention, by an improved filter comprising a pair of filter sheets being substantially identical in shape and in size, each of the filter sheets having a pair of side edges diverging upward and arc-shaped end edges extending between ends of the side edges so as substantially to define a fan-shape, the pair of filter sheets being laid one upon another and bonded to each other at least in the proximity of the side edges so that the arc-shaped end edges may form a circular opening as the filter sheets are spaced from each other, wherein substantially crescent-shaped flap sheets are bonded along their arc-shaped upper end edges to form a pair of pockets openable downward from the upper end edges.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view showing a filter according to the invention as being actually used;
FIG. 2 is a sectional view taken along a line W--W in FIG. 1;
FIG. 3 is a sectional view taken along a line X--X in FIG. 1;
FIG. 4 is a plan view of the filter as partially broken away;
FIG. 5 is a plan view showing the filter of FIG. 4 as having been developed;
FIG. 6 is a perspective view showing the filter of FIG. 4 as forming an opening; and
FIG. 7 is a sectional view taken along a line Y--Y in FIG. 6.
DESCRIPTION OF THE MOST PREFERRED EMBODIMENT
Details of a filter according to the invention will be described in reference with the accompanying drawings.
FIGS. 1, 2 and 3 respectively show a filter 1 in a perspective view as being actually used, and in sectional views taken along lines W--W and X--X, respectively. Referring to FIG. 1, the filter 1 is shown as hung on a hanger 2. The filter 1 is shaped in an inverted triangle as viewed in the sectional view taken along the line W--W and shaped in a trapezoid having its bottom side being shorter than its top side, and comprises a filter body 4 with its top side forming a circular opening 3 and flap sheets 6 each having an upper portion bonded the filter body 4 along a partial peripheral edge of the opening 3 and a lower portion defining a free edge 5 so that a pocket 8 opening downwardly of the filter 1 may be formed between a peripheral wall of the filter body 4 and the respective flap sheets 6. The hanger 2 is made of stainless steel wire rod and comprises an annular portion 11, a grip portion 12 formed by a part of the annular portion 11 extending outward, and a stopper portion 13 extending outward from the annular portion 11 in the direction opposite to that in which the grip portion 12 extends. FIG. 1 shows the grip portion 12 and the stopper portion 13 placed on an edge of a coffee cup 15 indicated b
REFERENCES:
patent: 1889845 (1932-12-01), Rundquist
patent: 3437540 (1969-04-01), Welin-Berger
patent: 3616934 (1971-11-01), Ehrlich
patent: 4220541 (1980-09-01), Chang
patent: 5059325 (1991-10-01), Iida
Kabushiki Kaisha Tokiwa Kogyo
Walker W. L.
LandOfFree
Conical filter having bonded end flaps does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Conical filter having bonded end flaps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conical filter having bonded end flaps will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-9684