US3923949A - Method of forming a such-back-preventing check valve in a liquid dispenser - Google Patents

Method of forming a such-back-preventing check valve in a liquid dispenser Download PDF

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Publication number
US3923949A
US3923949A US514846A US51484674A US3923949A US 3923949 A US3923949 A US 3923949A US 514846 A US514846 A US 514846A US 51484674 A US51484674 A US 51484674A US 3923949 A US3923949 A US 3923949A
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Prior art keywords
core pin
bridge portion
spout
flap
chamber
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Expired - Lifetime
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US514846A
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Neil G Kane
Administrator By Virginia Kane
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/0005—Components or details
    • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
    • B05B11/007—Outlet valves actuated by the pressure of the fluid to be sprayed being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0033—Moulds or cores; Details thereof or accessories therefor constructed for making articles provided with holes
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
    • B29C33/485—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling cores or mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/7506—Valves

Definitions

  • the flap during molding, is formed in non-flexing condition and has its lateral edges separated from the passage it closes after molding and setting of said head.
  • FIG. 1 is a longitudinal sectional view of the upper end of the dispensing head of a liquid dispensing device provided with a suck-back-preventing check valve formed by the present method.
  • FIG. 2 is a cross-sectional view as taken on the plane of line 2-2 of FIG. 1.
  • FIG. 3 is an enlarged longitudinal sectional view as taken on the plane of line 3-3 of FIG. 2, and shown with a core pin in place during molding of the dispensing head.
  • FIG. 4 is a vertical sectional view as taken on the plane of line 4-4 of FIG. 3.
  • FIG. 5 is a longitudinal sectional view on the plane on which FIG. 3 is taken, and showing the core pin partly retracted while shearing the side edges of the check valve from the adjacent lateral passage walls of the discharge portion of the dispensing head.
  • FIG. 6 is a sectional view on the same plane as FIG.
  • the present method has basis on a dispenser head 10 that is provided with an annular chamber 11 that is open at its bottom to receive liquid that is compressed upwardly from below as said head is pressed in a downward direction. Said head is shown with a laterally directed spout 12 for discharging liquid under the mentioned pressure from below. At 13 is shown the flap of the suck-back-preventing check valve.
  • the flap valve 13 is molded of the semi-plastic elastomeric material of which the head 10 is formed.
  • the spout passage 14, at its inward end 15, where the same joins the annular chamber 11, has a rectangular cross-sectional shape, the same being molded around the rectangular end 16 ofa core pin 17 that is preferably cylindrical to form the passage 14.
  • An upwardly sloping notch 18 in the end face 19 of the end 16 of the core pin produces a similarly sloping transverse web 20 that, during molding of the head 10, spans between the side walls of the rectangular end 15, as shown in FIG. 4.
  • FIG. 5 shows a partial extraction of the core pin.
  • the web 20 will have been shorn from the side walls of the passage end 15 and remains connected to the wall 21 only at its rearward end.
  • the web is converted into a flap which, having been molded with an upward slant, as in FIG. 3, naturally returns to its upwardly and forwardly slanted position as in FIG. 6.
  • the walls of notch 18 of said pin forces the mentioned shearing of the opposite edge of the web 20 from said passage walls 15.
  • the end of the core pin being formed to simultaneously mold a bridge portion of said elastomeric material, the bridge portion extending outwardly from the inner of said coaxial walls on an upward and forward angle, transversely across the passage, and integrally united with the side walls of the spout, and

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Closures For Containers (AREA)

Abstract

A method for providing an integral check valve of the flap valve type in the discharge spout of a telescopically movable head of a liquid dispenser molded or formed of an elastomeric plastic material such as polypropylene or polyethelene.

Description

United States Patent Kane, deceased et al. 1 1 Dec. 2, 1975 [5 METHOD OF FORMING A [58] Field of Search 264/138, 161, 163, 318; SUCH-BACK-PREVENTING CHECK VALVE 425/249, 289, 308, 310, 311, 468
IN A LIQUID DISPENSER [76] Inventors: Neil G. Kane, deceased, late of [56] 1 References cued Hacienda Heights, Calif.; by LNITED STATES PATENTS Virginia L. Kane, administrator, 3,064,310 11/1962 Cooprider 425/249 1 Rojas St Hacienda l-[eights 3,776,676 KESSIEI' Calif. 91745 Primary ExaminerRobert F. White [22] Flled' 1974 Assistant Examiner-T. E. Balhoff [21] Appl. N0.: 514,846
T Related US. Application Data L th d f d B t 1 h k l fth me 0 or PI'OVI mg an m egra 0 cc va ve o e [62] 1973 flap valve type in the discharge spout of a telescopically movable head of a liquid dispenser molded or [52] U 5 Cl 264/163. 264/3318 425/249 formed of an elastomeric plastic material such as poly- 425/289 propylene or polyethelene. [51 Int. Cl. B28B 7/28 2 Claims, 6 Drawing Figures US. Patent Dec. 2, 1975 3 ,923,949
METHOD OF FORMING A SUCI-I-BACK-PREVENTING CHECK VALVE IN A LIQUID DISPENSER This application is a division of pending application Ser. No. 426,942, filed Dec. 20, 1973 now abandoned.
BACKGROUND OF THE INVENTION The formation of an integral flap type valve of the above character which is molded as part of a member of the dispenser.
The applicant has no knowledge of prior art teaching the forming of an integral check valve flap in the outlet of a liquid dispenser, that includes the step of separating the lateral edges of the flap from the wall of the outlet after the element having the outlet has been formmolded.
SUMMARY OF THE INVENTION The method of providing the depressible plastic molded depressible head of a liquid dispenser with a suck-back-preventing check valve in the form of a flexible flap which has a normal inward flow-stopping position and opens to permit outward flow. The flap, during molding, is formed in non-flexing condition and has its lateral edges separated from the passage it closes after molding and setting of said head.
In the drawing, like reference characters designate similar parts in the several views.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a longitudinal sectional view of the upper end of the dispensing head of a liquid dispensing device provided with a suck-back-preventing check valve formed by the present method.
FIG. 2 is a cross-sectional view as taken on the plane of line 2-2 of FIG. 1.
FIG. 3 is an enlarged longitudinal sectional view as taken on the plane of line 3-3 of FIG. 2, and shown with a core pin in place during molding of the dispensing head.
FIG. 4 is a vertical sectional view as taken on the plane of line 4-4 of FIG. 3.
FIG. 5 is a longitudinal sectional view on the plane on which FIG. 3 is taken, and showing the core pin partly retracted while shearing the side edges of the check valve from the adjacent lateral passage walls of the discharge portion of the dispensing head.
FIG. 6 is a sectional view on the same plane as FIG.
5, showing the flap in the position thereof after the core pin has been entirely retracted.
DESCRIPTION OF THE PREFERRED METHOD The present method has basis on a dispenser head 10 that is provided with an annular chamber 11 that is open at its bottom to receive liquid that is compressed upwardly from below as said head is pressed in a downward direction. Said head is shown with a laterally directed spout 12 for discharging liquid under the mentioned pressure from below. At 13 is shown the flap of the suck-back-preventing check valve.
As can be seen in several figures of the drawing, the flap valve 13 is molded of the semi-plastic elastomeric material of which the head 10 is formed. The spout passage 14, at its inward end 15, where the same joins the annular chamber 11, has a rectangular cross-sectional shape, the same being molded around the rectangular end 16 ofa core pin 17 that is preferably cylindrical to form the passage 14. An upwardly sloping notch 18 in the end face 19 of the end 16 of the core pin produces a similarly sloping transverse web 20 that, during molding of the head 10, spans between the side walls of the rectangular end 15, as shown in FIG. 4.
Upon extraction of the core pin 17 from the molded head 10 after the semi-plastic material thereof has cured or, at least partly cured, the slant of the notch 18 will cause the web 20, as the core pin is extracted, to become sheared and separated from the side walls of the inward end 15 of the spout-passage. FIG. 5 shows a partial extraction of the core pin. Upon total extraction of the core pin, the web 20 will have been shorn from the side walls of the passage end 15 and remains connected to the wall 21 only at its rearward end. Upon such extraction of the core pin, the web is converted into a flap which, having been molded with an upward slant, as in FIG. 3, naturally returns to its upwardly and forwardly slanted position as in FIG. 6. In this regard, note how, upon such extraction of the core pin, the walls of notch 18 of said pin forces the mentioned shearing of the opposite edge of the web 20 from said passage walls 15.
While the foregoing has illustrated and described what is now contemplated to be the best mode of carrying out the invention, the construction is, of course, subject to modification without departing from the spirit and scope of the invention.
Having thus described the invention, what is claimed and desired to be secured by letters Patent is:
I. The method of molding a check valve in the form of a flap to control liquid flow between a chamber in the manually telescopically movable head of a liquid dispenser that consists in the steps of:
molding said head of an elastomeric plastic to provide the same withconcentric coaxial walls that define said chamber,
simultaneously molding a laterally directed spout around a core pin to form a flow passage within said spout, with said spout extending from said coaxial chamber walls and the passage being open to the upper end of said chamber,
the end of the core pin being formed to simultaneously mold a bridge portion of said elastomeric material, the bridge portion extending outwardly from the inner of said coaxial walls on an upward and forward angle, transversely across the passage, and integrally united with the side walls of the spout, and
finally withdrawing the core pin from the passage to cause vertical relative movement between the bridge portion and the end of the core pin which causes the end thereof to shear the opposite ends of the bridge portion from the side walls of the spout to convert said bridge portion into a flap so the same is free to flap up and down according to changes in pressure in said chamber and said flow passage.
2. The method according to claim 1 in which the mentioned shearing of the bridge portion is carried out by the faces of a biased slot in the end of the core pin, the rear edge of the slot progressively effecting such shear of the flap from the side walls of the flow passage.
as the core pin is being withdrawn.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Inventor s Neil G. Kane, deceased by Virginia L. Kane It is certified that error appears in the above-identified patent L and that said Letters Patent are hereby corrected as shown below:
On the Title Page and in Column 1, in the Title, the
word "Such" should read Suck a Signed and Scaled'this ninth Day Of March 1976 [SEAL] Arrest:
RUTH C. MASON C. MARSHALL DANN Arresting Officer (ommissium'r nflarenls and Tradcmurkx

Claims (2)

1. THE METHOD OF MOLDING A CHECK VALVE IN THE FORM OF A FLAP TO CONTROL LIQUID FLOW BETWEEN A CHAMBER IN THE MANUALLY TELESCOPICALLY MOVABLE HEAD OF A LIQUID DISPENSER THAT CONSISTS IN THE STEPS OF: MOLDING SAID HEAD OF AN ELASTOMERIC PLASTIC TO PROVIDE THE SAME WITH CONCENTRIC COAXIAL WALLS THAT DEFINE SAID CHAMBER, SIMULTANEOUSLY MOLDING A LATERALLY DIRECTED SPOUT AROUND A CORE PIN TO FORM A FLOW PASSAGE WITHIN SAID SPOUT, WITH SAID SPOUT EXTENDING FROM SAID COAXIAL CHAMBER WALLS AND THE PASSAGE BEING OPEN TO THE UPPER END OF SAID CHAMBER, THE END OF THE CORE PIN BEING FORMED TO SIMULTANEOUSLY MOLD A BRIDGE PORTION OF SAID ELASTOMERIC MATERIAL, THE BRIDGE PORTION EXTENDING OUTWARDLY FROM THE INNER OF SAID COAXIAL WALLS ON AN UPWARD AND FORWARD ANGLE, TRANSVERSELY ACROSS THE PASSAGE, AND INTERGRALLY UNITD WITH THE SIDE WALLS OF THE SPOUT, AND FINALLY WITHDRAWING THE CORE PIN FROM THE PASSAGE TO CAUSE VERTICAL RELATIVE MOVEMENT BETWEEN THE BRIDGE PORTION AND THE END OF THE CORE PIN WHICH CAUSE THE END THEREOF TO SHEAR THE OPPOSITE ENDS OF THE BRIDGE PORTION FORM THE SIDE WALLS OF THE SPOUT TO CONVERT SAID BRIDGE PORTION INTO A FLAP SO THE SAME IS FREE TO FLAP UP AND DOWN ACCORDING TO CHANGES IN PRESSURE IN SAID CHAMBER AND SAID FLOW PASSAGE.
2. The method according to claim 1 in which the mentioned shearing of the bridge portion is carried out by the faces of a biased slot in the end of the core pin, the rear edge of the slot progressively effecting such shear of the flap from the side walls of the flow passage as the core pin is being withdrawn.
US514846A 1973-12-20 1974-10-15 Method of forming a such-back-preventing check valve in a liquid dispenser Expired - Lifetime US3923949A (en)

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4264661A (en) * 1979-11-06 1981-04-28 Raychem Corporation Thermoplastic article and process for manufacture of same
US4268003A (en) * 1977-11-02 1981-05-19 Liautaud James P Mold core and method and apparatus for manufacture
FR2479072A1 (en) * 1980-03-26 1981-10-02 Global Castors & Hardware Ltd MOLDED ELEMENT COMPRISING A FALLING FLASHING LIP WITHOUT A FORMATION OF THE OUTSIDE, FURNITURE ROLLER PRODUCED THEREBY AND METHOD AND MOLD FOR MANUFACTURING SAME
US5104606A (en) * 1989-12-05 1992-04-14 Donoghue Robert J Method of molding a one-piece measuring and dispensing apparatus
US6361842B1 (en) 1996-05-30 2002-03-26 United States Brass Corporation Reformed crosslinked polyethylene articles
WO2004054722A1 (en) * 2002-12-13 2004-07-01 Incro Limited Pump-action nozzle arrangements
US10046885B2 (en) 2016-04-20 2018-08-14 Yeti Coolers, Llc Spigot and spigot guard for an insulating container
USD830116S1 (en) 2017-07-12 2018-10-09 Yeti Coolers, Llc Container mounting apparatus
USD830122S1 (en) 2017-07-12 2018-10-09 Yeti Coolers, Llc Dispenser
USD830123S1 (en) * 2017-07-12 2018-10-09 Yeti Coolers, Llc Dispenser
US10138047B2 (en) 2016-04-20 2018-11-27 Yeti Coolers, Llc Spigot and spigot guard for an insulating container
USD835472S1 (en) 2017-07-12 2018-12-11 Yeti Coolers, Llc Combined container mounting apparatus and container
USD835471S1 (en) 2017-07-12 2018-12-11 Yeti Coolers, Llc Container
USD835470S1 (en) 2017-07-12 2018-12-11 Yeti Coolers, Llc Container
USD835947S1 (en) 2017-07-12 2018-12-18 Yeti Coolers, Llc Container mounting apparatus
USD835946S1 (en) 2017-07-12 2018-12-18 Yeti Coolers, Llc Container
USD839661S1 (en) 2017-07-12 2019-02-05 Yeti Coolers, Llc Container mounting apparatus
USD843180S1 (en) 2017-10-25 2019-03-19 Yeti Coolers, Llc Container mounting apparatus
US10526130B2 (en) 2016-04-20 2020-01-07 Yeti Coolers, Llc Insulating container
US10899503B2 (en) 2016-04-20 2021-01-26 Yeti Coolers, Llc Spigot and spigot guard for an insulating container

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064310A (en) * 1960-04-20 1962-11-20 Drackett Co Method and apparatus for making plastic articles
US3776676A (en) * 1972-06-26 1973-12-04 M Kessler Insulated runner system for plastic cap molds

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064310A (en) * 1960-04-20 1962-11-20 Drackett Co Method and apparatus for making plastic articles
US3776676A (en) * 1972-06-26 1973-12-04 M Kessler Insulated runner system for plastic cap molds

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4268003A (en) * 1977-11-02 1981-05-19 Liautaud James P Mold core and method and apparatus for manufacture
US4264661A (en) * 1979-11-06 1981-04-28 Raychem Corporation Thermoplastic article and process for manufacture of same
FR2479072A1 (en) * 1980-03-26 1981-10-02 Global Castors & Hardware Ltd MOLDED ELEMENT COMPRISING A FALLING FLASHING LIP WITHOUT A FORMATION OF THE OUTSIDE, FURNITURE ROLLER PRODUCED THEREBY AND METHOD AND MOLD FOR MANUFACTURING SAME
US5104606A (en) * 1989-12-05 1992-04-14 Donoghue Robert J Method of molding a one-piece measuring and dispensing apparatus
US6361842B1 (en) 1996-05-30 2002-03-26 United States Brass Corporation Reformed crosslinked polyethylene articles
WO2004054722A1 (en) * 2002-12-13 2004-07-01 Incro Limited Pump-action nozzle arrangements
US10526130B2 (en) 2016-04-20 2020-01-07 Yeti Coolers, Llc Insulating container
US10046885B2 (en) 2016-04-20 2018-08-14 Yeti Coolers, Llc Spigot and spigot guard for an insulating container
US11608213B2 (en) 2016-04-20 2023-03-21 Yeti Coolers, Llc Spigot and spigot guard for an insulating container
US10899503B2 (en) 2016-04-20 2021-01-26 Yeti Coolers, Llc Spigot and spigot guard for an insulating container
US10138047B2 (en) 2016-04-20 2018-11-27 Yeti Coolers, Llc Spigot and spigot guard for an insulating container
USD835946S1 (en) 2017-07-12 2018-12-18 Yeti Coolers, Llc Container
USD835472S1 (en) 2017-07-12 2018-12-11 Yeti Coolers, Llc Combined container mounting apparatus and container
USD835470S1 (en) 2017-07-12 2018-12-11 Yeti Coolers, Llc Container
USD835947S1 (en) 2017-07-12 2018-12-18 Yeti Coolers, Llc Container mounting apparatus
USD830116S1 (en) 2017-07-12 2018-10-09 Yeti Coolers, Llc Container mounting apparatus
USD839661S1 (en) 2017-07-12 2019-02-05 Yeti Coolers, Llc Container mounting apparatus
USD997651S1 (en) 2017-07-12 2023-09-05 Yeti Coolers, Llc Container
USD835471S1 (en) 2017-07-12 2018-12-11 Yeti Coolers, Llc Container
USD887789S1 (en) 2017-07-12 2020-06-23 Yeti Coolers, Llc Container
USD830123S1 (en) * 2017-07-12 2018-10-09 Yeti Coolers, Llc Dispenser
USD915831S1 (en) 2017-07-12 2021-04-13 Yeti Coolers, Llc Container
USD930441S1 (en) 2017-07-12 2021-09-14 Yeti Coolers, Llc Container
USD965390S1 (en) 2017-07-12 2022-10-04 Yeti Coolers, Llc Container
USD830122S1 (en) 2017-07-12 2018-10-09 Yeti Coolers, Llc Dispenser
USD843180S1 (en) 2017-10-25 2019-03-19 Yeti Coolers, Llc Container mounting apparatus

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