US3579734A - Float-operated level control - Google Patents

Float-operated level control Download PDF

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Publication number
US3579734A
US3579734A US732201A US3579734DA US3579734A US 3579734 A US3579734 A US 3579734A US 732201 A US732201 A US 732201A US 3579734D A US3579734D A US 3579734DA US 3579734 A US3579734 A US 3579734A
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US
United States
Prior art keywords
float
valve member
valve
gelatine
box
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
US732201A
Other languages
English (en)
Inventor
Maharaj K Mehta
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.)
Catalent UK Swindon Encaps Ltd
Leiner P and Sons Encapsulations Ltd
P Leiner and Sons Encapsulations Ltd
Original Assignee
Leiner P and Sons Encapsulations Ltd
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 Leiner P and Sons Encapsulations Ltd filed Critical Leiner P and Sons Encapsulations Ltd
Application granted granted Critical
Publication of US3579734A publication Critical patent/US3579734A/en
Assigned to R. P. SCHERER LIMITED, 216-222 BATH ROAD, SLOUTH, BERKS SL1 4DR, ENGLAND A BRITISH CORP. reassignment R. P. SCHERER LIMITED, 216-222 BATH ROAD, SLOUTH, BERKS SL1 4DR, ENGLAND A BRITISH CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BOND, IAN DOUGLAS BARKER, RECEIVER FOR P. LEINER & SONS (ENCAPSULATIONS) LIMITED (IN LIQUIDATION), SMART, RICHARD ANTHONY, RECEIVER FOR P. LEINER & SONS (ENCAPSULATIONS) LIMITED (IN LIQUIDATION)
Assigned to P LEINER & SONS LIMITED reassignment P LEINER & SONS LIMITED CERTIFIED COPY OF A GUARANTEE AND DEBENTURE SHOWING APPOINTMENT OF RECEIVERS DATED FEB. 12, 1980. Assignors: BARCLAYS BANK LIMITED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/914—Cooling drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/31—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections
    • B29C48/313—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections by positioning the die lips

Definitions

  • a spreader box for containing gelatine to be cast into ribbons or sheets on a casting drum including a floatoperated valve consisting of a hollow cylindrical rotary valve member and a cylindrical float parallel to the rotary axis of the valve member and connected thereto so that angular movement of the float about said axis is transmitted to the valve member.
  • the valve member has an aperture in its side wall which cooperates with the end of a stationary flow passage to limit the flow of gelatine into the spreader box.
  • the float is rotatable manually beyond a position above the rotary axis of the valve member to close the valve.
  • This invention relates to a float-operated level control for restoring the level of a liquid to a predetermined level.
  • the invention is particularly suitable for use in a spreader box which contains gelatine for casting into ribbons or sheets on a casting drum.
  • a floatoperated valve for restoring a liquid level to a predetermined level, comprising a flow passage through which the liquid flows to alter the liquid level, a rotary member having an orifice for co-operating with the flow passage to pass the liquid which flows through the flow passage, a float connected to the rotary member for rotating the member to a position different from its normal position in accordance with the difference of the liquid level from the predetermined level, and the co-operation between the orifice and the flow passage being dependent upon the position of the float, whereby the rate at which liquid is passed through the orifice is controllable.
  • FIG. 1 is an elevation, partly in cross-section, of a spreader box employing a float-operated valve embodying the invention
  • FIG. 2 is a cross-sectional view taken along the line 2-2 of the spreader box shown in FIG. 1.
  • the spreader box illustrated has two spaced parallel side walls 11 and 12, a front wall 13 in the form of an adjustable doctor blade, and a rear wall 14 sloping downwardly towards the front of the box.
  • the rear wall 14 carries at its lower end a resilient bottom plate 15, which presses against a casting drum 16.
  • the box has a floatoperated valve 20 mounted on the side wall 11 and connected to an inlet pipe 17, and an outlet '21 which is the slit between the bottom of the doctor blade 13 and the drum 16.
  • the spreader box is designed for supplying gelatine to the casting drum for casting ribbons or sheets of gelatine.
  • a sheet 22 of gelatine is formed on the surface of the drum 16.
  • the thickness of the sheet depends on the 3,579,734 Patented May 25, 1971 speed of rotation of the drum 16 and the position of the doctor blade 13, which is adjustable by a captive screw 24.
  • the valve 20 is controlled by a cylindrical float 25, the side of which is attached to a rotatable bar 26 for rotation about the axis thereof, which is parallel to the longitudinal axis of the cylindrical float.
  • the bar 26 is connected at one end to a length of hollow cylindrical tubing 30, and at the other end is supported by a bearing 33 mounted on the side wall 12.
  • the tube 30 is closed at both ends and has two holes or orifices 31 and 32 in its side wall.
  • the inlet hole 31 is arranged so that when the float 25 hangs down vertically (position A in FIG. 2) the inlet hole 31 fully co-operates with the end of the inlet pipe 17.
  • the outlet hole 32 discharges directly into the spreader box.
  • FIG. 2 shows three positions of the float.
  • Position A is adopted when the liquid level is low, and the valve 20 is fully open, as described above.
  • the float 25 gradually rotates, causing the tube 30 to rotate also, and thereby reducing the rate of flow of gelatine into the box, until the gelatine has reached a predetermined level, at which point the float is in the steady position B and the rate at which gelatine enters the spreader box through the valve 20 equals the rate at which it leaves the box through the outlet 21.
  • the ease with which the valve 20 can be manually turned off completely makes it more convenient than a conventional ball-cock, as it may obviate the need for a tap or stop-cock.
  • the shape of the orifice 31 and the end of the inlet tube 17 can be altered so that any desired cut-off law can be employed, thus varying the permissible limits for the liquid level in normal operation.
  • the valve 20 illustrated is particularly useful for use with gelatine, since the cutting action of the tube 30 as it rotates is not affected by frictional and viscous forces as much as a conventional ball-cock would be. With less viscous fluids, it may be necessary to provide a seal to ensure that no fluid passes when the valve is closed.
  • valve means for controlling flow of liquid into said box, said valve means comprising a rotary valve member rotatably supported on one of said walls, an elongated substantially cylindrical float of substantially large diameter disposed within said box and positioned substantially parallel to the rotary axis of said valve member and connected to said valve member so that small vertical movement of said float about said axis causes comparatively large angular movement of said valve member, and bar means positioned on said rotary axis for fixedly connectin said float to said valve member, said bar means being disposed closely adjacent the periphery of said cylindrical float and having a first portion fixed to said valve member and to said float adjacent one end thereof, and said bar means including a second portion rotatably supported on
  • said bar means includes an elongated bar extending between said walls and disposed directly adjacent and attached to the external periphery of said float.
  • 1815X valve member comprises a cylindrical tube lying on said 2,996,222 8/1961 Botkin 222-67 rotary axis and having an aperture in its sidewall for 3,357,052 12/ 1967 Vos 18 15 cooperation with the end of a stationary inlet flow passage 1 in dependence upon the position of said float.
  • 5 J SPENCER OVERHOLSER, Primary Ex in References Cited M. O. SUTTON, Assistant Examiner UNITED STATES PATENTS Us CL 1,650,806 11/1927 Slaten 22267 222-67 2,714,976 8/1955 Sucksdorif 22267X 10

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Float Valves (AREA)
  • Moulding By Coating Moulds (AREA)
US732201A 1967-07-18 1968-05-27 Float-operated level control Expired - Lifetime US3579734A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32919/67A GB1167569A (en) 1967-07-18 1967-07-18 Spreader Box

Publications (1)

Publication Number Publication Date
US3579734A true US3579734A (en) 1971-05-25

Family

ID=10345958

Family Applications (1)

Application Number Title Priority Date Filing Date
US732201A Expired - Lifetime US3579734A (en) 1967-07-18 1968-05-27 Float-operated level control

Country Status (5)

Country Link
US (1) US3579734A (de)
CH (1) CH494360A (de)
DE (2) DE1996272U (de)
FR (1) FR1580378A (de)
GB (1) GB1167569A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773452A (en) * 1970-05-12 1973-11-20 J Taga Apparatus for molding thermoplastic materials
US4988471A (en) * 1989-09-15 1991-01-29 Sano, Inc. Apparatus and method of forming a continuous layer of thermoplastic material
US6141835A (en) * 1998-12-31 2000-11-07 Sport Supply Group, Inc. Adjustable belt buckles
US6241631B1 (en) 1998-12-31 2001-06-05 Sport Supply Group, Inc. Flag football device and coupling therefor
US6589038B1 (en) * 2000-01-31 2003-07-08 Hughes Electronics Corporation Constant pressure casting head using variably displaceable cavity surface
US20080217812A1 (en) * 2007-03-06 2008-09-11 X.O. Industries Inc. Spreader box apparatus and method of forming bi-laminar paintball shell material and paintballs for use with paintball gun
WO2009121825A1 (fr) * 2008-04-02 2009-10-08 Societe De Technologie Michelin Buse comprenant une palette d'applique articulee

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274701A (en) * 1993-02-02 1994-08-03 Unilever Plc Controlling detergent level with a float valve
ES2911640T3 (es) * 2019-09-12 2022-05-20 Airbus Operations Sl Válvula de sobrellenado con una válvula de flotador

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773452A (en) * 1970-05-12 1973-11-20 J Taga Apparatus for molding thermoplastic materials
US4988471A (en) * 1989-09-15 1991-01-29 Sano, Inc. Apparatus and method of forming a continuous layer of thermoplastic material
US6141835A (en) * 1998-12-31 2000-11-07 Sport Supply Group, Inc. Adjustable belt buckles
US6241631B1 (en) 1998-12-31 2001-06-05 Sport Supply Group, Inc. Flag football device and coupling therefor
US6308381B1 (en) 1998-12-31 2001-10-30 Sport Supply Group, Inc. Adjustable belt buckles
US20030201558A1 (en) * 2000-01-31 2003-10-30 Hughes Electronics Corporation Constant pressure casting head using variably displaceable cavity surface
US6589038B1 (en) * 2000-01-31 2003-07-08 Hughes Electronics Corporation Constant pressure casting head using variably displaceable cavity surface
US6780354B2 (en) 2000-01-31 2004-08-24 The Directtv Group, Inc. Method for casting using a casting head having a variably displaceable cavity surface
US20080217812A1 (en) * 2007-03-06 2008-09-11 X.O. Industries Inc. Spreader box apparatus and method of forming bi-laminar paintball shell material and paintballs for use with paintball gun
US8137598B2 (en) * 2007-03-06 2012-03-20 Kee Action Sports Technology Holdings, Llc Spreader box apparatus and method of forming bi-laminar paintball shell material and paintballs for use with paintball gun
WO2009121825A1 (fr) * 2008-04-02 2009-10-08 Societe De Technologie Michelin Buse comprenant une palette d'applique articulee
FR2929548A1 (fr) * 2008-04-02 2009-10-09 Michelin Soc Tech Buse comprenant une palette d'applique articulee.
US20110174444A1 (en) * 2008-04-02 2011-07-21 Societe De Technologie Michelin Nozzle including a Jointed Application Pallet

Also Published As

Publication number Publication date
DE1996272U (de) 1968-11-07
FR1580378A (de) 1969-09-05
GB1167569A (en) 1969-10-15
DE1773767A1 (de) 1971-06-03
CH494360A (de) 1970-07-31

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Legal Events

Date Code Title Description
AS Assignment

Owner name: P LEINER & SONS LIMITED

Free format text: CERTIFIED COPY OF A GUARANTEE AND DEBENTURE SHOWING APPOINTMENT OF RECEIVERS DATED FEB. 12, 1980.;ASSIGNOR:BARCLAYS BANK LIMITED;REEL/FRAME:004056/0782

Effective date: 19781229

Owner name: R. P. SCHERER LIMITED, 216-222 BATH ROAD, SLOUTH,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:BOND, IAN DOUGLAS BARKER, RECEIVER FOR P. LEINER & SONS(ENCAPSULATIONS) LIMITED (IN LIQUIDATION);SMART, RICHARD ANTHONY, RECEIVER FOR P. LEINER & SONS (ENCAPSULATIONS) LIMITED (IN LIQUIDATION);REEL/FRAME:004056/0778;SIGNING DATES FROM