US3779415A - Combined filter paper support and filtrate container - Google Patents

Combined filter paper support and filtrate container Download PDF

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Publication number
US3779415A
US3779415A US00138617A US3779415DA US3779415A US 3779415 A US3779415 A US 3779415A US 00138617 A US00138617 A US 00138617A US 3779415D A US3779415D A US 3779415DA US 3779415 A US3779415 A US 3779415A
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US
United States
Prior art keywords
container
area
body portion
flared
outside diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00138617A
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English (en)
Inventor
R Eddleman
R Schmitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spectrum Medical Industries Inc
Original Assignee
Spectrum Medical Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Spectrum Medical Industries Inc filed Critical Spectrum Medical Industries Inc
Application granted granted Critical
Publication of US3779415A publication Critical patent/US3779415A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L1/00—Enclosures; Chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/508—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above
    • B01L3/5082—Test tubes per se
    • B01L3/50825—Closing or opening means, corks, bungs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/04—Closures and closing means
    • B01L2300/041—Connecting closures to device or container
    • B01L2300/042—Caps; Plugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/06—Auxiliary integrated devices, integrated components
    • B01L2300/0681—Filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/12—Specific details about materials
    • B01L2300/123—Flexible; Elastomeric

Definitions

  • a container capable of functioning as a combined filter paper support and filtrate holder which comprises a self-standing body portion which narrows into a neck area which in turn flares outwardly to the upper lip.
  • the size of the neck area and flared portion are selected so that they are capable of supporting a conical filter medium such as a folded piece of filter paper.
  • the container is further adapted to be tightly closed by a flexible stopper having an exterior, downwardly extending protective skirt which extends over the lip area as well as the outside of the neck and flared portions.
  • the field of the invention is laboratory glassware and more specifically relates to laboratory beakers or flasks.
  • Commonly used beakers are generally cylindrically shaped and have a stable base portion and an upper lip. The upper lip typically contains a pouring spout portion to facilitate the emptying of a fluid from the beaker into another container.
  • Such beakers are commonly used to collect and contain a filtered liquid.
  • Other related containers commonly used to collect and contain filtrates include Florence flasks, Erlenmeyer flasks and round-bottomed flasks. While beakers typically have cylindrical sides, flasks typically are greatly narrowed at the top to help contain liquids and to permit them to hold a stopper.
  • the most common procedure is to support a funnel above a container and a filter medium is then placed within the funnel and the liquid to be filtered is poured into the filter medium.
  • a filter medium is then placed within the funnel and the liquid to be filtered is poured into the filter medium.
  • There are various means for supporting the funnel a common one being a ring stand. It is also common to support the funnel on the upper lip of a flask. Of course, this decreases the stability of the flask and can lead to broken glassware.
  • cylindrical beakers have the advantage of being easy to clean, they are not readily adapted to be closed. Florence and Erlenmeyer flasks may be closed by the insertion of a cork or other stopper but because of their narrow neck area are difficult to clean and dry.
  • the need for supporting a funnel on a ring stand not only requires the use of the cumbersome ring stand support but also the ring stand itself can collect foreign matter which can be brushed off its surface to contaminate the filtrate.
  • the present invention is for a container which has a base portion which permits the container to stand without support on a horizontal surface, a body portion for containing a liquid, a neck area adapted to be sealed by a flexible stopper and an upper flared portion shaped to support a conically folded filter medium.
  • the neck portion must be small enough to be readily closed by a flexible stopper.
  • the flared area must have a shape and an inside diameter which will support a conically folded filter medium such as a circular piece of filter paper which has been folded first along its diameter and secondly along the bisector of the resulting semi-circle. When such a sheet of circular filter paper has been thus folded, and opened it forms a cone having an angle of 60.
  • the upper lip of the container is preferably smaller than the outside diameter of the body portion to enable a stopper having a cylindrical, downwardly extending protective skirt to be placed thereover and the resulting stoppered container to have no greater size at the stopper than in the body portion.
  • the upper portion of the containers shown in the drawings are divided into a neck area and a flared area. That portion of the container which extends from the body portion inwardly to a minimum inside dimension will be referred to as the neck area. That portion which extends upwardly from the minimum inside diameter is referred to as the flared portion.”
  • the neck area In those instances when the container is shaped to have a cylindrical length along its minimum inside diameter the neck area will be referred to as that portion which extends upwardly from the body portion, through the cylindrical portion and to the point when the inside diameter increases.
  • a container generally indicated as 10 has a base portion 11 which extends from the intersections l2 and 13 of the base portion with a body portion 14.
  • body portion 14 shown in FIGS. l and 2 is cylindrical, it could be square, rectangular, triangular or the like.
  • the neck area begins at intersection 15 and extends upwardly to the plane of minimum inside diameter 16.
  • the flared area extends upwardly from 16 ending at the upper lip 17.
  • the upper lip 17 may contain a spout I8 and furthermore may contain two or more spouts although only one is shown in the drawings.
  • the spout 18 should not extend downwardly to the plane of minimum inside diameter, however, since this might interfere with the ability to close the container with a cylindrical stopper.
  • the body portion 14 may be in a shape other than a cylinder, it is preferable that the area near the plane of minimum inside diameter 16 be circular along any horizontal plane. In this way, a stopper having a frustro-conical shape can form a tight seal with the container.
  • a conical filter medium is shown resting against the flared portion of the container 10.
  • this filter medium will often be referred to as filter paper but, of course, need not be fabricated from paper but may instead be formed from another porous medium.
  • Laboratory filter paper is most commonly supplied in flat circular sheets. These are formed into generally conical shapes by a two-step folding operation. The first step is to fold the circular sheet along the diameter to form a doubled semi-circle. The second folding step is made along the bisecting radius of the semi-circle. The paper is then opened up and can be made to form a cone whose opposite sides form an angle of 60 with one another.
  • the angle of the conical filter medium 20 of FIG. 1 is indicated by the reference character a.
  • the function of the flared area to support the conical filter medium in such a manner that it neither falls through the flared area nor tips over after it has been filled with a liquid.
  • the shape and dimensions relative to the filter paper are of extreme importance. It has been found that a frustro-conical shape such as that shown in FIG. 4 and discussed below is satisfactory. It has further been discovered that the shape formed by the rotation of an are about the central axis of the container is particularly effective in performing this dual function. A slight misalignment of the conical filter medium is readily supported by such a shape and the support is such that it does not tend to crease or indent the filter medium. As discussed herein, the shape of the flared portion is referred to exclusive of the spout or spouts.
  • a stopper generally indicated at 30, is shown placed in the upper part of the container 10.
  • the stopper is formed from an outer piece 31 made from a relatively hard material such as polypropylene.
  • This outer piece 31 has a downwardly extending protective skirt 32 formed integrally therewith.
  • the stopper 30 has a central flexible portion 33 which further has a hollowed out area 34 to further increase the flexibility of the central portion.
  • An outer protrusion 35 extends around the lower edge of the flexible portion 33 to help hold the stopper in the neck area of the container. Note that the stopper seals the container by contacting with the neck area rather than with the flared portion. It is thus important that the neck area be circular at the point at which it contacts outer protrusion 35.
  • the stopper may be rotated to facilitate its removal and insertion while still forming a tight seal.
  • the upper portion of outer piece 31 is indented to form a dish-shaped surface 36.
  • Dish-shaped surface 36 is formed in the same shape as base portion 11 of the container shown in FIG. 1. In this way several stoppered containers may be readily and stably stacked.
  • the outer skirt 32 preferably extends downwardly to a point where it is close to intersection 15 between the neck area and the body portion 14. In this way, the protective skirt prevents contamination from dust and other powders often found in chemical labs. This protection extends well past the upper lip and spout areas since it further protects the outer surface of the flared portion and the neck area.
  • FIG. 4 The configuration of the stopper is shown in FIG. 4 in plan view with a part of the flexible portion 33 broken away. Openings 40 and 41 are formed in ridge 37 and the corresponding part of groove 38 is filled in so that it locks the flexible portion 33 in a non-rotatable relationship with the outer piece 31. In this way, the flexible portion 33 may be rotated to facilitate the insertion or removal of the stopper from the container.
  • the angle of the flared portion 50 of FIG. 4 is preferably 58 it may be varied between 50 and and still function effectively.
  • a funnel would not be effective over such a wide range of angles and the ability of the container of FIG. 4 to do this results from the relatively large minimum inside diameter as compared with a funnel. Note that there is no contact between the container and the filter paper 51 below the bottom of the frustro-conical portion of the container. In this way the liquid may freely flow through the filter paper and is not blocked by contact with a typical conical funnel.
  • a stopper was fabricated having an outer piece molded from polypropylene and an inner flexible portion molded from natural rubber with a 50 durometer hardness.
  • the outer protrusion indicated by the reference character 35 in FIG. 3 had an outside diameter of 1.54 inches.
  • the inside diameter of the hollowed out area was 1.10 inches and the hollowed out area 34 had a height of 0.50 inches.
  • the distance from the bottom of the flexible portion of the stopper to its top was 1.40 inches.
  • the combination of the stopper and container of the present invention results in a particularly effective piece of laboratory apparatus. Note that this combination takes the place of a series of conventional laboratory equipment. It is no longer necessary to support a funnel over a container or to transfer a filtered liquid from a beaker to another container which may be readily stoppered. Still further it was often necessary to place an additional protective cover over a stoppered beaker to decrease the chance for contamination of the unprotected lip area.
  • the flared portion of the container is designed such that it is capable of supporting conventional filter paper containing the heaviest liquids without falling below into the container.
  • the container of the present invention may be both readily cleaned and its contents may be stirred or otherwise treated readily by insertions of spatulas or the like.
  • the flared portion of the container facilitates the pouring of powders into the container.
  • a container for use in filtering liquids capable of supporting a filter medium and also capable of containing the resulting filtrate comprising:
  • a body portion having a base which permits the container to stand in an upright position on a horizon tal surface
  • a circular neck area integral with said body portion and located thereabove, the minimum inside diameter of said neck area being at least two-fifths of the maximum outside dimension of said body portion but no more than three-fifths of said maximum outside dimension;
  • a flared area extending upwardly from said neck area and terminating in an upper lip opening, said lip opening having a pouring spout and having a maximum outside diameter less than the maximum outside diameter of said body portion;
  • cover means fabricated from a rigid plastic attached to the upper end of said flexible stopper means, said cover means having a protective skirt extending outwardly above and downwardly around the upper lip of said container and further downwardly therefrom to a distance so that it about touches the intersection of the body portion and the neck area of said container when said stopper is fully inserted in said container, said skirt being generally cylindrical and having an outside diameter about equal to the outside diameter of the body portion of said container.
  • a container for use in filtering liquids said container being capable of supporting a conically folded piece of 11 centimeter filter paper and further being capable of containing liquid said container comprising:
  • a cylindrical body portion having an outside diameter between 1 A and 5 inches and having a base portion which permits the container to stand in an upright position on a horizontal surface;
  • neck area having a circular cross-section at any horizontal plane, the minimum inside diameter of said neck area being between two-fifths and threefifths of its outside diameter;
  • a flared area extending upwardly from said neck area and terminating in an upper lip opening having a maximum outside diameter less than the outside diameter of said cylindrical body portion and greater than said minimum inside diameter
  • cover means fabricated from a rigid plastic attached to the upper end of said flexible stopper means, said cover means having a protective skirt extending outwardly above and downwardly around the upper lip of said container and further downwardly therefrom to a distance so that it about touches the intersection of the body portion and the neck area of said container when said stopper means is fully inserted in said container, said skirt being generally cylindrical and having an outside diameter about equal to the outside diameter of the body portion of said container.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Hematology (AREA)
  • Closures For Containers (AREA)
  • Sampling And Sample Adjustment (AREA)
US00138617A 1971-04-29 1971-04-29 Combined filter paper support and filtrate container Expired - Lifetime US3779415A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13861771A 1971-04-29 1971-04-29

Publications (1)

Publication Number Publication Date
US3779415A true US3779415A (en) 1973-12-18

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ID=22482833

Family Applications (1)

Application Number Title Priority Date Filing Date
US00138617A Expired - Lifetime US3779415A (en) 1971-04-29 1971-04-29 Combined filter paper support and filtrate container

Country Status (4)

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US (1) US3779415A (de)
DE (1) DE2220647C2 (de)
FR (1) FR2134700B1 (de)
GB (1) GB1395394A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619766A (en) * 1984-04-23 1986-10-28 Smiley Thomas B Beverage brewings filters, apparatus and method
US5232111A (en) * 1991-05-13 1993-08-03 Becton, Dickinson And Company Stopper-shield combination closure
US5616242A (en) * 1995-05-26 1997-04-01 Mandola; Mary D. Two stage bottle filter for the removal of sediment
WO1997021603A1 (en) * 1995-12-11 1997-06-19 Amway Corporation Dual composition lid and method of manufacture thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590974A (en) * 1983-12-22 1986-05-27 Carb-A-Drink International, Inc. Beverage dispenser

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US334415A (en) * 1886-01-19 Steam-condensing doctor for paper-machines
US557053A (en) * 1896-03-24 Shoe-fastener
US579867A (en) * 1897-03-30 Water-bottle
GB1053659A (de) * 1900-01-01
US1275816A (en) * 1917-08-24 1918-08-13 Samuel S Williamson Closure for containers.
US1718897A (en) * 1926-11-26 1929-06-25 Fed Glass Company Measuring device
GB546443A (en) * 1941-05-02 1942-07-14 Peter Schlumbohm Filtering device
US2583162A (en) * 1950-07-27 1952-01-22 Evelyn I Verel Stopper for containers
FR1112313A (fr) * 1954-10-08 1956-03-13 Le Bouchage Moderne Dispositif de bouchage
US2978142A (en) * 1959-03-24 1961-04-04 Novick Jack Self stacking cans
US3140007A (en) * 1962-09-07 1964-07-07 Antaeus Lineal 1948 Specimen container
US3371808A (en) * 1966-08-01 1968-03-05 Evert D. Velt Unitary safety cap

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2321639A (en) * 1939-09-07 1943-06-15 Kimble Glass Co Funnel and method of filtering
US2359943A (en) * 1941-05-05 1944-10-10 Isaac Harter Filtering and decanter device
FR1284822A (fr) * 1961-03-21 1962-02-16 Sobioda Perfectionnements aux boîtes de pétri
US3536197A (en) * 1968-11-15 1970-10-27 Crystalab Inc Liquid treating apparatus

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US334415A (en) * 1886-01-19 Steam-condensing doctor for paper-machines
US557053A (en) * 1896-03-24 Shoe-fastener
US579867A (en) * 1897-03-30 Water-bottle
GB1053659A (de) * 1900-01-01
US1275816A (en) * 1917-08-24 1918-08-13 Samuel S Williamson Closure for containers.
US1718897A (en) * 1926-11-26 1929-06-25 Fed Glass Company Measuring device
GB546443A (en) * 1941-05-02 1942-07-14 Peter Schlumbohm Filtering device
US2583162A (en) * 1950-07-27 1952-01-22 Evelyn I Verel Stopper for containers
FR1112313A (fr) * 1954-10-08 1956-03-13 Le Bouchage Moderne Dispositif de bouchage
US2978142A (en) * 1959-03-24 1961-04-04 Novick Jack Self stacking cans
US3140007A (en) * 1962-09-07 1964-07-07 Antaeus Lineal 1948 Specimen container
US3371808A (en) * 1966-08-01 1968-03-05 Evert D. Velt Unitary safety cap

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619766A (en) * 1984-04-23 1986-10-28 Smiley Thomas B Beverage brewings filters, apparatus and method
US5232111A (en) * 1991-05-13 1993-08-03 Becton, Dickinson And Company Stopper-shield combination closure
US5616242A (en) * 1995-05-26 1997-04-01 Mandola; Mary D. Two stage bottle filter for the removal of sediment
WO1997021603A1 (en) * 1995-12-11 1997-06-19 Amway Corporation Dual composition lid and method of manufacture thereof

Also Published As

Publication number Publication date
GB1395394A (en) 1975-05-29
FR2134700B1 (de) 1976-10-29
DE2220647A1 (de) 1972-11-16
DE2220647C2 (de) 1982-07-29
FR2134700A1 (de) 1972-12-08

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