US3920143A - Plastic cap for stoppering bottles - Google Patents

Plastic cap for stoppering bottles Download PDF

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Publication number
US3920143A
US3920143A US573083A US57308375A US3920143A US 3920143 A US3920143 A US 3920143A US 573083 A US573083 A US 573083A US 57308375 A US57308375 A US 57308375A US 3920143 A US3920143 A US 3920143A
Authority
US
United States
Prior art keywords
cap
skirt
additive
plastic
coextrusion
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
US573083A
Other languages
English (en)
Inventor
Jean-Marie Vouillemin
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.)
Tuboplast France SA
Original Assignee
Tuboplast France SA
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 Tuboplast France SA filed Critical Tuboplast France SA
Application granted granted Critical
Publication of US3920143A publication Critical patent/US3920143A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/62—Secondary protective cap-like outer covers for closure members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2435/00—Closures, end caps, stoppers
    • B32B2435/02—Closures, end caps, stoppers for containers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S215/00—Bottles and jars
    • Y10S215/02—Coatings and laminations for making of bottle caps

Definitions

  • ABSTRACT plastic seals or caps for stoppering bottles.
  • the skirt of these caps is obtained by coextrusion or thermoshaping of .two plastic materials of the same family.
  • the inside layer contains an additive which reduces the rubbing factor, while the outside layer may have different characteristics.
  • the present invention concerns a plastic cap for stoppering bottles.
  • a device In order to position the cap, a device is used possessing a certain number of prongs with rounded exterior surface, which are mounted on slides, each one on a support, in such a way as to be able to spread apart radially one from the other, which serves to dilate the skirt sufficiently to permit the penetration of the neck of the bottle between the prongs and by continuing the movement of the bottle in the same direction, the disengagement of the cap, which automatically resumes its initial dimensions, which causes it to adapt itself closely to the exterior surface of the neck of the bottle.
  • the tension of the plastic will be strongest in this area and it becomes impossible to remove the cap without tearing it.
  • mm suitable for rims of 29 mm do not withstand, with- .out damage, dilation in several tenths of a second to a diameter of 42 mm (the required diameter for placement on rims of 34 mm).
  • this modification has a drawback; it becomes impossi- 2 decorating procedures such as offset, silk screen or any other process.
  • the superimposed plastic cap for stoppering designed according to this invention, is formed by two elements: a cylindrical skirt and a disc attached to the edge of one of the openings of this cylinder, the skirt being formed by coextrusion of two thermoplastic materials of the same family with the inner layer containing, as an additive, a product which reduces the rubbing coefficient.
  • This over-sealcan also be formed by thermoshaping beginning with composite sheets obtained by coextrusion of two plastic materials of thesame family.
  • the additive can be'aimonostearate of glycerine for example or a fatty starch.
  • FIG. 1 represents a vertical section of a cap according to the invention.
  • FIG. 2 represents an enlargement of a detail of the side of the skirt indicated by n in FIG. 1.
  • the skirt 1 is essentially cylindrical, only its upper edge 2 being slightly curved toward the inside in order to be joined to the disc 3 which forms the head of the cap: the joining of these two parts can be done by any known process, for example, casting from existing molds.
  • the disc 3 can be provided with an opening 4 allowing the air to escape the moment the cap is placed on the bottle, I
  • the diameter d of the skirt is less than the smallest diameter of the neck of the bottle on which it is to be placed'and is constant throughout the entire height h below its upper edge.
  • the side of the skirt 1 is made of two layers 5 and 6 of ostensibly equal thickness, effected by coextrusion, layer 5 being on the inside and layer 6 on the outside. The two layers are closely joined, their surfaces of contact practically disappearing by the interpenetration of the molecules of their surfaces.
  • composition of these layers which together form a thickness of 0.5 mm is notably the same, for example, high pressure low density polyethylene of grade 0.4.
  • a slippery agent which reduces the rubbing factor of this layer.
  • this agent is composed of 0.25% monostearate of glycerine.
  • a fatty starch is added, preferably in the form of a chiefly nutritive substance, that is to say composed of elements which are non-toxic and non-alterable when in contact with alimetary products submerged in a neuter mass, the proportion of the mixture used being 2.5%.
  • Caps made in this way can be placed on the bottles at a much higher rate, more than 2400 units per hour. Yet imprinting the outside surface no longer presents a problem and can be done in the same way as ordinary caps.
  • the two layersof the skirt can be of two different colors with a third color for the disc 3. It has been found that the use .of polyethylene of grade 0.4 almost completely eliminates the risk of cracking the caps during the period of stockpiling, whereas caps obtained by injection use materials of grade 3 or more.
  • agents added to the inner layer are in time diffused into the mass of the two layers, which again increases the rubbing coefficient inside the cap and contributes to the latter holding better on the neck of the bottle. This change does not become noticeable until several months after the manufacturing of the cap, imprinting and positioning having been completed for a long time.
  • skirts with very improved mechanical characteristics: compared with a similar cover obtained by the usual extrusion method, extension of the breaking point goes from 460 to 588%, while constraint of the breaking point goes from l,l08 kg/cm to 1,662 kg/cm
  • extension of the breaking point goes from 460 to 588%
  • constraint of the breaking point goes from l,l08 kg/cm to 1,662 kg/cm
  • the skirt ofa cap of nominal diameter of 27.5 mm can be dilated without damage in several tenths of a second to a diameter of 42 mm.
  • Such a cap produced in accordance with this invention allows capping all bottles whose necks have rims ranging in diameter from 29 to 34 mm at a rapid rate (more than 2400 units per hour).
  • a plastic cap for stoppering bottles and the like comprising a cylindrical plastic skirt open at both ends, a circular disc secured within one of said openings to close said one end, the body of said skirt having an inner and an outer layer being formed by the coextrusion of two thermoplastic materials of the same family, the inner layer of the skirt containing an additive which reduces the rubbing factor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Laminated Bodies (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Packages (AREA)
US573083A 1974-06-12 1975-04-30 Plastic cap for stoppering bottles Expired - Lifetime US3920143A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU70300A LU70300A1 (it) 1974-06-12 1974-06-12

Publications (1)

Publication Number Publication Date
US3920143A true US3920143A (en) 1975-11-18

Family

ID=19727681

Family Applications (1)

Application Number Title Priority Date Filing Date
US573083A Expired - Lifetime US3920143A (en) 1974-06-12 1975-04-30 Plastic cap for stoppering bottles

Country Status (20)

Country Link
US (1) US3920143A (it)
JP (1) JPS5632185B2 (it)
AR (1) AR207981A1 (it)
AT (1) AT345682B (it)
BE (1) BE829982A (it)
BR (1) BR7503631A (it)
CH (1) CH593834A5 (it)
DE (1) DE7518169U (it)
DK (1) DK255075A (it)
ES (1) ES212005Y (it)
FI (1) FI57914C (it)
FR (2) FR2274517A1 (it)
GB (1) GB1509016A (it)
HU (1) HU174395B (it)
IT (1) IT1038825B (it)
LU (1) LU70300A1 (it)
NL (1) NL7507035A (it)
NO (1) NO145193C (it)
SE (1) SE411531B (it)
ZA (1) ZA753685B (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162601A (en) * 1977-08-19 1979-07-31 Buckeye Molding Company Secondary closure, method and apparatus
FR2684657A1 (fr) * 1991-12-05 1993-06-11 Remy Ets Pierre Procede de mise en place de capsules de surbouchage sur des bouteilles et capsules de surbouchage pour sa mise en óoeuvre.
US5325977A (en) * 1991-06-07 1994-07-05 Becton, Dickinson And Company Vented closure for a capillary tube
FR2775467A1 (fr) * 1998-02-27 1999-09-03 Ri Dino Dal Capsule de surbouchage garantissant contre des intrusions pour les bouteilles fermees par bouchons liege

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819556B2 (ja) * 1977-04-05 1983-04-19 冨士シ−ル工業株式会社 保護筒つき包装体の製造方法及び製造装置
JPS5440789A (en) * 1977-09-06 1979-03-30 Sekisui Plastics Method of expansion or contraction wrapping by expansible and contractible sheet

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862614A (en) * 1972-01-28 1975-01-28 Illinois Tool Works Sheet of elastic covers for containers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862614A (en) * 1972-01-28 1975-01-28 Illinois Tool Works Sheet of elastic covers for containers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4162601A (en) * 1977-08-19 1979-07-31 Buckeye Molding Company Secondary closure, method and apparatus
US5325977A (en) * 1991-06-07 1994-07-05 Becton, Dickinson And Company Vented closure for a capillary tube
FR2684657A1 (fr) * 1991-12-05 1993-06-11 Remy Ets Pierre Procede de mise en place de capsules de surbouchage sur des bouteilles et capsules de surbouchage pour sa mise en óoeuvre.
FR2775467A1 (fr) * 1998-02-27 1999-09-03 Ri Dino Dal Capsule de surbouchage garantissant contre des intrusions pour les bouteilles fermees par bouchons liege

Also Published As

Publication number Publication date
FI57914B (fi) 1980-07-31
ATA444775A (de) 1978-01-15
NL7507035A (nl) 1975-12-16
DK255075A (da) 1975-12-13
DE2525396A1 (de) 1976-01-02
ES212005U (es) 1976-06-01
NO145193C (no) 1982-02-03
JPS5632185B2 (it) 1981-07-25
NO145193B (no) 1981-10-26
FI57914C (fi) 1980-11-10
IT1038825B (it) 1979-11-30
FI751623A (it) 1975-12-13
HU174395B (hu) 1979-12-28
BR7503631A (pt) 1976-06-22
FR2274517A1 (fr) 1976-01-09
NO751997L (it) 1975-12-15
ZA753685B (en) 1976-05-26
BE829982A (fr) 1975-10-01
DE7518169U (de) 1975-10-23
ES212005Y (es) 1976-11-01
CH593834A5 (it) 1977-12-15
LU70300A1 (it) 1976-04-13
FR2274517B1 (it) 1983-07-01
DE2525396B2 (de) 1977-02-24
AU8175175A (en) 1976-12-09
AR207981A1 (es) 1976-11-22
SE411531B (sv) 1980-01-14
AT345682B (de) 1978-09-25
FR2296573A2 (fr) 1976-07-30
JPS5149884A (it) 1976-04-30
GB1509016A (en) 1978-04-26
SE7506753L (sv) 1975-12-15

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