US20050133964A1 - Semisolid product dispensing head - Google Patents
Semisolid product dispensing head Download PDFInfo
- Publication number
- US20050133964A1 US20050133964A1 US11/043,735 US4373505A US2005133964A1 US 20050133964 A1 US20050133964 A1 US 20050133964A1 US 4373505 A US4373505 A US 4373505A US 2005133964 A1 US2005133964 A1 US 2005133964A1
- Authority
- US
- United States
- Prior art keywords
- media
- head frame
- head
- strands
- semisolid
- 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.)
- Abandoned
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Images
Classifications
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- 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
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
- B65D83/0011—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container moved by a screw-shaft
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
- A45D40/02—Casings wherein movement of the lipstick or like solid is a sliding movement
- A45D40/04—Casings wherein movement of the lipstick or like solid is a sliding movement effected by a screw
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
- A45D40/08—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks with provision for sieves or shaping parts for sticks ends
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14418—Sealing means between mould and article
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- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt joints
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
- B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
- B29C66/12449—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being asymmetric
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
- B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
- B29C66/12463—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
- B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
- B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
- B29C66/1248—Interpenetrating groove joints
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
- B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
- B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
- B29C66/24223—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being oval
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/342—Preventing air-inclusions
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
- B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
- B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
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- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
- B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
- B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
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- B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
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- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/20—Inserts
- B29K2105/206—Meshes, lattices or nets
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- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0068—Permeability to liquids; Adsorption
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- 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
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0068—Permeability to liquids; Adsorption
- B29K2995/0069—Permeability to liquids; Adsorption non-permeable
-
- 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
- B29L2031/712—Containers; Packaging elements or accessories, Packages
-
- 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
- B29L2031/718—Cosmetic equipment, e.g. hair dressing, shaving equipment
-
- 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
- B29L2031/718—Cosmetic equipment, e.g. hair dressing, shaving equipment
- B29L2031/7186—Shaving equipment
Definitions
- the present invention relates primarily to a dispenser for gel deodorants or other semisolid products, and particularly to the head of a deodorant dispenser and methods of making the head and otherwise treating porous media so as to have properties desired in a semisolid product dispenser.
- Deodorants and antiperspirants are typically applied to the skin of the underarm from some form of dispenser. Years ago aerosol cans were commonly employed to dispense deodorants. Deodorants in solid form have become popular. The solid deodorant is held in a body that has a piston. A cap is removed from the body, and the piston is activated to force the solid deodorant upwardly until the top portion is exposed. The top portion can then be rubbed onto the underarm skin.
- the opening size of the screen plays conflicting roles. If the opening size is too large, the gel material will flow out if the dispenser is tipped on its side. On the other hand, if the opening size is too small, the gel material has to be put under such pressure when it is forced through the screen that the gel structure is compromised. For example, the liquid portion of the gel may disassociate from solid portions, or oil and water emulsions of other semisolid deodorants may break. In addition, when a semisolid deodorant is over pressurized, it continues to ooze out even though the user no longer activates the piston, and in fact may have set the dispenser aside after using it. When the user comes back, the deodorant has come through the screen and dried on top of the screen.
- woven screen material Another problem with woven screen material is that it is difficult to provide openings consistently sized any smaller than 400 square microns (20 microns by 20 microns) when making a weave. It is nearly impossible to make an opening smaller than 5 microns by 5 microns using a woven screen. If a media with an opening of 2 microns or less is desired, a porous membrane usually has to be used. Thus, if the semisolid deodorant material has a low viscosity, it may not be possible to make a normal woven screen with a pore size that will prevent the material from leaking out.
- Another problem with the use of a woven screen is that the percent open area of a screen gets smaller and smaller as the pore size is reduced.
- the strands or fibers making the screen must be large enough to give integrity to the screen. As they are placed closer and closer to one another to reduce the pore size, the ratio of open area to area blocked by the fibers is reduced.
- the problem with a low percentage open area is that the amount of material that can be forced through the screen is reduced as the percent open area is decreased.
- a woven screen material Another problem with a woven screen material is that if it is stretched while being manufactured as part of the dispensing head, especially around the edges when a rounded shape piece of media is used, the openings are not uniform. More deodorant could come out of the larger openings than the openings in the middle of the piece of media.
- a porous material made from an extrusion of strands of polymer has been found which provides desired properties in making a head for a semisolid product dispenser. Also, it has been discovered that the opening size and shapes of the openings of a porous media can be improved for use in a semisolid product dispenser by crushing the media between two hard surfaces, such as parts of a mold tool. Further, an ultrasonic weld joint has been developed which can be used to securely join inexpensive polypropylene.
- the invention is a method of making a head for a semisolid product dispenser comprising the steps of providing a piece of porous media having a desired shape with a perimeter and openings through the media in the area inside of the perimeter; compressing at least the portion of the media inside of the perimeter between two parts of a hard tool so as to crush the media, thereby reducing the size of the openings; and affixing the porous media to a head frame to form the semisolid product dispenser head.
- the invention is the method of making a head for a semisolid product dispenser comprising the steps of providing a piece of porous media made of multiple layers of extruded strands wherein the strands are generally coplanar and parallel to one another within each layer and the strands in one layer are non-parallel to strands in an adjoining layer and bonded to the strands in the adjoining layer at crossover points between the strands; and insert molding the piece of porous media with a thermoplastic material into a head frame to thereby produce a head for a semisolid product dispenser.
- the invention is an improved porous media where the porous media has multiple layers of extruded strands of polymer with the strands in each layer being generally coplanar and parallel to one another, the direction of the strands in one layer being non-parallel to the strands in an adjoining layer, the strands being bonded to the strands in the adjoining layer at crossover points between the strands, and the media having openings through the media defined by spaces between the strands in one layer superimposed over spaces between strands in the adjoining layer, improved in that the average size of the openings through the media are reduced by crushing the strands of one layer against the strands of an adjoining layer, thereby flattening the strands and reducing the size of the spaces between the strands.
- the invention is an improved dispenser for dispensing a semisolid product
- the dispenser includes a hollow body containing a semisolid product and a piston to force the semisolid product out of the hollow body through a porous media affixed to a head secured on the body, improved in that the porous media comprises multiple layers of extruded strands of polymer wherein the strands in each layer are generally coplanar and parallel to one another, the direction of the strands in one layer being non-parallel to the strands in an adjoining layer, the strands being bonded to the strands in the adjoining layer at crossover points between the strands, and the media having openings through the media defined by spaces between the strands in one layer superimposed over spaces between strands in the adjoining layer.
- the invention is a method of reducing the pore size of a porous media comprising the steps of providing a porous media comprising multiple layers of extruded strands of polymer wherein the strands in each layer are generally coplanar and parallel to one another, the direction of the strands in one layer being non-parallel to the strands in an adjoining layer, the strands being bonded to the strands in the adjoining layer at crossover points between the strands, and the media having openings through the media defined by spaces between the strands in one layer superimposed over spaces between strands in the adjoining layer; and compressing the media between two opposing hard surfaces so as to flatten the individual strands, thus making the strands wider in a direction perpendicular to the hard surfaces, thereby reducing the size of the openings between the strands.
- the invention is a method of making a semisolid product dispenser comprising the steps of providing a head frame with a top end and a sidewall depending from the top end; providing a body member that mates with the head frame, defining a deodorant holding and distribution space between the top end and the body member; providing mating ultrasonic weld joint surfaces on the head frame and the body member that provide a weld joint and a positive stop; and ultrasonically welding the body member and head frame together.
- the invention is a semisolid product dispenser comprising a head frame having a top end and a sidewall depending from the top end, the top end having a porous media attached thereto; a body member having an outer wall inside of the sidewall, the head top end and body member having a semisolid product holding and distribution space between them; and the body member outer wall being ultrasonically welded to the head frame to provide a leak-free joint so that all semisolid product in said body member may be forced out of said holding and distribution space through the porous media.
- the invention is a method of reducing the pore size of a porous media comprising the steps of providing a porous media having a first average thickness with openings therethrough creating a first average pore size; and compressing the media between opposing surfaces on a core and a cavity of a mold tool so as to reduce the average thickness of the media and to reduce the size of the openings through the media to create a second average pore size smaller than the first average pore size.
- the invention is a method of making a head for a semisolid deodorant dispenser comprising the steps of providing a piece of generally flat porous media having a perimeter; forming the porous media into a dome shape; and attaching the perimeter to a head frame having a central opening therethrough such that the dome shape of the media is retained, the media and the dome shape formed being rigid enough such that even though the media is supported only by its edges, the dome does not collapse when the head is pressed against underarm skin with normal user force sufficient to spread deodorant forced through the media across the skin.
- the invention is a deodorant dispenser comprising a body holding a semisolid deodorant and a dispensing head, the dispensing head having a frame with a central opening therethrough and a porous media shaped in the form of a dome convex of the rest of the head, the media having a perimeter which is attached to the head frame, the dome extending over the central opening, and the media being sufficiently rigid when in the dome shape such that the dome does not collapse when the head is pressed against underarm skin with normal user force sufficient to spread semisolid deodorant forced through the media across the skin.
- FIG. 1 is a cross-sectional perspective view of a preferred semisolid product dispenser incorporating aspects of the present invention using a woven media.
- FIG. 2 is an exploded view of the top portion of the semisolid product dispenser of FIG. 1 using an extruded media.
- FIG. 3 is a cross-sectional view of the top portion of the semisolid product dispenser taken along line 3 - 3 of FIG. 2 , except that a woven media is depicted.
- FIG. 4 is a plan view of the preferred extruded, porous media used in the semisolid product dispenser of FIG. 2 .
- FIG. 5 is a cross-sectional view of the porous media taken along line 5 - 5 of FIG. 4 .
- FIG. 6 is a cross-sectional view of the semisolid product transfer member taken along line 6 - 6 of FIG. 2 , showing a vent.
- FIG. 7 is a cross-sectional view of the semisolid product transfer member taken along line 7 - 7 of FIG. 2 .
- FIG. 8 is a cross-sectional view of the head frame with a porous media insert molded therein, taken along line 8 - 8 of FIG. 2 .
- FIG. 9 is a cross-sectional view of the head frame of FIG. 8 welded to semisolid product transfer member of FIG. 7 .
- FIG. 10 is a cross-sectional view of a mold tool used to make an alternative embodiment of a semisolid product dispenser head.
- FIGS. 10A, 10B and 10 C are each cross-sectional views of a part of the mold tool of FIG. 10 in different operating positions.
- the present invention will be described in terms of a dispenser for a gel deodorant because the currently preferred semisolid product dispenser is designed for a gel deodorant. However, it should be understood that the invention is applicable to other semisolid products, such as cream or soft-stick deodorants. Further, some aspects of the invention have utility in other products beside deodorant dispensers, such as shaving cream, insect repellant, medicinal agents and other compositions applied to the skin.
- FIGS. 1-9 A preferred embodiment of the gel deodorant dispenser 10 of the present invention is shown in FIGS. 1-9 .
- the dispenser 10 is made of three main sections, a body 20 , a neck 30 and a dispensing head assembly 50 .
- a cap 18 is usually included to cover the head assembly 50 when not in use.
- the body 20 and neck 30 were developed by others. The details of their construction are not important except to the extent that the head 50 cooperates with the body 20 and neck 30 . However, as best understood by the present inventors, the preferred body 20 and neck 30 of the gel deodorant dispenser 10 are shown in FIGS. 1 and 2 .
- the body 20 is made with a base 23 and upstanding walls 21 , and is hollow so that it can house the gel deodorant material.
- a piston 22 is mounted on screw 24 so that as screw 24 is turned, the piston 22 rides up inside of walls 21 , forcing gel inside the body upward.
- the top of body 20 is closed by lid 28 except for two gel ports 25 ( FIG. 2 ).
- the top 26 of screw 24 is journaled in another opening through lid 28 .
- the neck 30 includes two gel transfer tubes 35 that mate with gel ports 25 when the neck 30 is attached to body 20 .
- neck 30 includes a structure for turning screw 24 , in this case a ratchet 36 and pawl 37 .
- the neck 30 has a window 31 ( FIG. 2 ) in which a push button 32 ( FIG. 1 ) is mounted.
- Button 32 is connected by a slide arm 34 to activate ratchet 36 mounted on the top of screw 24 .
- Guides 39 molded on the bottom of shelf 38 cooperate to guide the slide arm 34 .
- the shelf 38 has two holes, a round hole where the top 26 of screw 24 comes up, and a rectangular hole under a pawl 37 so that the pawl 37 is free to flex as ratchet 36 is rotated forward.
- the pawl 37 prevents the ratchet 36 from turning backwards after having been activated by the slide arm 34 .
- button 32 is pushed, ratchet 36 and screw 24 rotate, causing piston 22 to raise, forcing gel deodorant out of the hollow body 20 , through gel ports 25 and gel transfer tubes 35 to the head assembly.
- the sidewalls of the neck 30 , the gel transfer tubes 35 , the shelf 38 , the guides 39 and the pawl 37 are all molded as one piece.
- head assembly 50 is made of three main parts, a porous media 60 , a head frame 70 and a gel transfer body member 80 .
- the porous media 60 generally starts out as a flat piece of material that is die-cut from a larger piece and then insert molded as the head frame 70 is injection molded.
- the gel transfer member 80 is molded separately, and then the head frame 70 and gel transfer member 80 are welded together, as explained in more detail below.
- the porous media could be a woven screen (as shown in FIGS. 1 and 3 ), but more preferably the porous media is a material supplied by Nalle Plastics Inc. of Austin, Tex. (shown in FIGS. 2, 4 and 5 ), under the tradename of Naltex, and is preferably modified as described below.
- the Naltex material is made from at least two layers of extruded strands.
- the strands in each layer are generally coplanar and parallel to one another, as shown in FIGS. 5 and 6 .
- the strands 62 in one layer are non-parallel to the strands 64 in an adjoining layer.
- the strands are bonded to the strands in the adjoining layer at crossover points between the strands.
- the surface is textured.
- the strands produce a ribbed effect on the surface. This ribbed effect helps to evenly spread a deodorant or other material as it is applied to the skin. It also prevents clogging that would be more likely to occur if the surface were smooth.
- the media 60 has openings 66 ( FIG. 4 ) defined by spaces between the strands 62 in one layer that are superimposed over spaces between the strands 64 in the adjoining layer.
- the preferred material has the strands 62 in one layer oriented at an angle of between about 20° and 90° compared to the strand 64 of the adjoining layer.
- the preferred Naltex material is flattened as shown in FIG. 5 so that strands 62 and 64 are flattened, thus reducing the size of the openings 66 , but still leaving a textured or ribbed surface. Since it is difficult to extrude a material with a small pore size, this step of crushing the media provides an innovative method of obtaining an inexpensive media with a desired small pore size for use in making a gel deodorant dispenser head assembly.
- the head frame 70 is preferably molded from thermoplastic material, such as polypropylene.
- the head frame 70 has a top end 72 with a central opening 74 therethrough. Sidewalls 76 depending from the top end 72 extend around the entire perimeter of the head frame 70 .
- An internal ridge 78 ( FIG. 8 ) is formed on the inside of the frame member, just inside from the central opening 74 . This ridge 78 is used in an ultrasonic welding process, described below.
- the core 102 of the tool has a lip 104 around the perimeter of the center portion of the core.
- This lip 104 is used to create a band 69 ( FIG. 2 ) around the perimeter 68 of the porous media where all the openings 66 are closed off.
- This band 69 is the result of the lip crushing the strands 62 and 64 of the media so tightly that none of the hot thermoplastic material in the molding step can flow through the openings between the strands 62 and 64 in the area of the band 69 .
- This band also serves another function in the finished product. As gel is forced through the media 60 , it cannot flow through the area where the band 69 is formed. As a result, there is a visible demarcation between where gel is forced through the media 60 and where gel is not forced through the media. Preferably that line of demarcation is inside of the inner edge of the central opening 74 .
- the perimeter 68 of the piece of media is bent inwardly (as shown in FIG. 8 ) by a ridge formed on the mold tool cavity. This results in a clean appearance as the edge of the porous media 60 is encapsulated or embedded in the plastic of the head frame, rather than “floating” near the surface where it could be seen, or worse yet, make for sharp protruding edges.
- the closing of the mold tool 102 preferably not only creates band 69 , but it also crushes the media so that the openings 66 are reduced in size. Hence, the gap between the core 102 and the cavity of the mold tool will be slightly less than the original thickness of the media 60 .
- the mold tool 102 also forms the media 60 into a dome shape as the core 102 is convex and the cavity is concave. The dome shape is then maintained once the tool is opened because the media 60 is sufficiently rigid to maintain the dome shape when its edges are embedded in the head frame top end 72 .
- the dome shape and the rigidness of the porous media 60 are preferably sufficient so that, even though the media is supported only at its edges, the dome does not collapse when the head 50 is pressed against underarm skin with normal user force sufficient to spread gel forced through the media across the skin. This rigidity thus prevents “overdosing.”
- the mold tool can be modified to cause greater crushing of the media in the areas where flow needs to be retarded.
- the greater crushing causes the openings 66 in those areas to be smaller, thus retarding the flow.
- Either the core pin or the mold tool, or both, can be modified to reduce the gap between them in the areas where the gel transfer tubes empty out.
- This preferably produces a graduated size for the openings with respect to their position on the surface of the head, with a region having a smaller average pore size than the average pore size outside of the region.
- the amount of gel that comes through is preferably uniform across the surface of the head 50 , except that no gel comes through the area inside of band 69 .
- the gel transfer body member 80 has outer walls that mate with the head frame 70 , inside the sidewalls 76 , defining a deodorant holding and distribution space 82 ( FIG. 3 ) between the top end 72 of the head frame, the porous media 60 and the gel transfer member 80 .
- the gel transfer member 80 also has two funnel-shaped members 84 that terminate in rounded ends 85 that fit in the top of gel transfer tubes 35 .
- the top of each gel transfer tube 35 preferably has an internal rim 41 that co-acts with an external rib 86 on each of the ends 85 to form a snap fit, holding the head assembly 50 onto the neck 30 once the parts are assembled.
- the gel transfer member 80 has a groove 88 ( FIGS. 6 and 7 ) which is used to form the ultrasonic weld. It also has an energy-directing point 91 which is used in the weld.
- Two vents 92 are located at the bottom of the groove 88 , directly opposite from one another on the sides of the gel transfer member. One of these vents 92 is shown in FIG. 6 . The other vent is not shown. These vents allow any gas trapped in the groove 88 when the weld is made to escape out from between the parts.
- the ridge 78 acts as a tongue and cooperates with groove 88 to form a tongue-and-groove joint, best seen in FIG. 9 .
- This joint is a double shear joint, as the ridge 78 is wider at its bottom than the bottom 89 of groove 88 . Meanwhile, energy-directing point 91 melts into the underside of top end 72 . Thus, when the parts are welded together, there are two types of welds made.
- the weld design incorporates a positive stop.
- a positive stop surface 93 on the gel transfer member 80 contacts a positive stop surface 79 on the head frame when the weld has progressed to a sufficient depth.
- the welding operation can be carried out for longer lengths of time without fear of destroying the pieces.
- a more solid and leak-free joint can be formed, even when polypropylene is used for the head frame 70 and gel transfer member 80 .
- these parts will not come apart, even when the gel is under pressure and the head is rubbed against underarm skin. Rather, all of the gel transferred to the gel transfer member 80 is forced out of the deodorant holding and distribution space 82 through the porous media 60 .
- the Naltex material is preferably crushed in the mold tool.
- One of the benefits of using the mold tool for the crushing operation is that the crushing can be done in the same step as the insert molding, and areas of reduced size openings can be made in the correct position with respect to the gel transfer tubes.
- the crushing step usually reduces the thickness of the material to between about 20% and about 90% of its original thickness.
- the media preferably has a first average thickness of between about 0.01 and about 0.1 inches, most preferably about 0.05 inches. This preferred media is crushed to a second average thickness of between about 0.035 and about 0.04 inches. In the area of band 69 the preferred material is crushed to a thickness of about 0.02 inches.
- the compression step normally changes the shape of the openings. More importantly, it usually changes the size of the openings.
- the average opening size of the media in the area inside of the perimeter formed by band 69 will preferably be reduced by at least 10%, and more preferably by at least 30%, and even as much as 50% by crushing.
- a preferred material may have an average opening size greater than 30,000 square microns before crushing, and after being crushed will have an average opening size of less than 30,000 square microns.
- the opening size of the crushed media will be less than 40,000 square microns. More preferably, the average opening size will be between about 900 and about 30,000 square microns.
- the desired opening size will depend on the viscosity and other properties of the deodorant.
- a preferred opening size after crushing would be less than 10,000 square microns, such as a 60 micron square opening.
- the open area may be reduced from about 20-30% to about 5% by the crushing operation.
- FIGS. 10, 10A , 10 B and 10 C depict another embodiment of the invention.
- the porous media is formed as part of the injection molding of the head frame 170 , which is comparable to the head frame 70 in FIGS. 1-9 .
- the mold tool 202 for forming the head frame 170 includes multitudes of small core pins 206 which are initially extended to abut the cavity tool 201 .
- the porous media 160 is also formed as part of the injection mold, and openings 166 in the porous media 160 result from the core pins 206 .
- the pins 206 attached to plate 212 , are withdrawn ( FIG. 10B ).
- the mold tool front 210 is then closed more tightly against the mold cavity 201 ( FIG. 10C ).
- the preferred Naltex material is extruded using two layers of strands, with about 33, and preferably about 36 strands per inch in each layer.
- This type of material may be ordered from Nalle Plastics as Naltex S 1970. It has a thickness of about 0.051 inches and openings of about 200 microns square (40,000 square microns). After being crushed the openings are about 170 microns by 150 microns (25,500 square microns).
- the use of a crushing step to reduce pore size would also be applicable to porous media made from weaving, casting, needle punching, water jets and laser drilling, as well as extrusion and injection molding described above.
- the media from Naltex is made from polypropylene.
- the media could be made of other polymers such as polyethylene, nylon, polyester or combinations thereof.
- Polypropylene is preferred because it is inexpensive and easily crushed.
- the percent open area of the porous media will be between about 1% and about 50%, and more preferably at least 2%.
- the band 69 where the openings have been completely closed is preferably about one-eighth inch wide.
- the energy directing point 91 preferably has a 45° slope on the point.
- One of the benefits of using the positive stop surfaces 79 and 93 is that the position of the gel transfer member 80 with respect to the head frame 70 in the final head assembly 50 is very consistent. This results in the position of the external ribs 86 being precise with respect to the rest of the head assembly 50 . Thus when the head 50 is snapped onto the neck 30 , the ribs 86 catch under rims 41 to hold the neck and head securely.
- the porous media could be welded onto the head frame by solvent welding, heat molding, ultrasonic welding or other methods of attachment.
- the products, apparatus and methods of the present invention are capable of being incorporated in the form of a variety of embodiments, only a few of which have been illustrated and described above.
- the invention may be embodied in other forms without departing from its spirit or essential characteristics.
- the deodorant dispenser instead of molding the head frame and crushing the media in the same tool, those steps could be carried out in different tools.
- the body 20 , neck 30 and gel transfer body member 80 instead of using the body 20 , neck 30 and gel transfer body member 80 , the deodorant dispenser could simply have a hollow body with a piston inside, and the head frame 70 could be welded directly to that body.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Coating Apparatus (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Pens And Brushes (AREA)
- Cosmetics (AREA)
Abstract
A method of making a head for a semisolid product dispenser, such as a gel deodorant dispenser, comprises the steps of: providing a piece of porous media having a desired shape with a perimeter and openings through the media in the area inside of the perimeter, compressing at least the portion of the media inside of the perimeter between two parts of a hard tool so as to crush the media, thereby reducing the size of the openings, and affixing the porous media to a head frame to form the semisolid product dispenser head. Preferably the porous media is affixed to the head frame by an insert injection molding process, and the media is crushed in the same mold tool as is used to mold the head frame. A preferred porous media is made of two layers of extruded strands of polymer, where the strands in one layer are generally parallel to one another but are non-parallel to the strands in the adjoining layer, the strands are bonded at crossover points between the layers and have openings defined by spaces between the strands in one layer superimposed over spaces between strands in the adjoining layer. Preferably the head of the semisolid product dispenser is made by ultrasonically welding the head frame to a transfer member using a combination of double shear and energy-directing ultrasonic weld joints, coupled with a positive stop.
Description
- The present application claims the benefit of the filing date under 35 U.S.C. § 119(e) of provisional U.S. Patent Application Ser. No. 60/142,176, filed Jul. 1, 1999, which is hereby incorporated by reference.
- The present invention relates primarily to a dispenser for gel deodorants or other semisolid products, and particularly to the head of a deodorant dispenser and methods of making the head and otherwise treating porous media so as to have properties desired in a semisolid product dispenser.
- Deodorants and antiperspirants (hereinafter jointly referred to as deodorants) are typically applied to the skin of the underarm from some form of dispenser. Years ago aerosol cans were commonly employed to dispense deodorants. Deodorants in solid form have become popular. The solid deodorant is held in a body that has a piston. A cap is removed from the body, and the piston is activated to force the solid deodorant upwardly until the top portion is exposed. The top portion can then be rubbed onto the underarm skin.
- Most recently, clear, gel deodorants have been proposed. Other semisolid forms of deodorant, such as creams or soft sticks, have also been suggested. One of the benefits of such semisolid deodorants is that they are less expensive to manufacture, because the fluid nature of the semisolid deodorant allows it to be pumped and easily loaded into a dispenser as part of the manufacturing step. One of the difficulties with dispensing a gel or other semisolid is that there must be a surface onto which the semisolid deodorant is applied, which is then brought into contact with the underarm. One prior art gel deodorant dispenser used a type of a grate. Gel was forced upwardly from within a body holding the gel through holes in the grate. The gel stayed on top of this grate and was then wiped onto the skin of the underarm. The grate was rigid, and was formed by injection molding plastic into a mold. The holes were formed by core pins within the mold.
- Another proposal was to take a woven screen material and insert mold the woven screen material into a frame, thus forming a head. However, because the woven screen material was not rigid, it was proposed to include supports within the head to force the screen material to take on a dome shape so that it could contact the skin of the underarm. Several problems have been encountered with this proposal. First, the supports inherently block some of the openings in the screen, and the gel comes out unevenly across the screen. However, if no supports are used, and the screen collapses, all of the gel under the screen will come out, causing an overdose.
- Second, the opening size of the screen plays conflicting roles. If the opening size is too large, the gel material will flow out if the dispenser is tipped on its side. On the other hand, if the opening size is too small, the gel material has to be put under such pressure when it is forced through the screen that the gel structure is compromised. For example, the liquid portion of the gel may disassociate from solid portions, or oil and water emulsions of other semisolid deodorants may break. In addition, when a semisolid deodorant is over pressurized, it continues to ooze out even though the user no longer activates the piston, and in fact may have set the dispenser aside after using it. When the user comes back, the deodorant has come through the screen and dried on top of the screen.
- Another problem with woven screen material is that it is difficult to provide openings consistently sized any smaller than 400 square microns (20 microns by 20 microns) when making a weave. It is nearly impossible to make an opening smaller than 5 microns by 5 microns using a woven screen. If a media with an opening of 2 microns or less is desired, a porous membrane usually has to be used. Thus, if the semisolid deodorant material has a low viscosity, it may not be possible to make a normal woven screen with a pore size that will prevent the material from leaking out.
- Another problem with the use of a woven screen is that the percent open area of a screen gets smaller and smaller as the pore size is reduced. The strands or fibers making the screen must be large enough to give integrity to the screen. As they are placed closer and closer to one another to reduce the pore size, the ratio of open area to area blocked by the fibers is reduced. The problem with a low percentage open area is that the amount of material that can be forced through the screen is reduced as the percent open area is decreased.
- Another problem with a woven screen material is that if it is stretched while being manufactured as part of the dispensing head, especially around the edges when a rounded shape piece of media is used, the openings are not uniform. More deodorant could come out of the larger openings than the openings in the middle of the piece of media.
- Besides the porous media itself, there are other difficulties in making a head for a semisolid product dispenser. Because the semisolid product is a gel or some other fluid material, all of the passageways between where it is stored and where it is dispensed must be fluid tight so that the product does not leak out under pressure. If parts of the dispenser are made out of an inexpensive thermoplastic material such as polypropylene, it is difficult to form leak-free joints between the parts, as polypropylene does not normally form strong bonds between parts. At times, ultrasonically welded parts only look like they are bonded because polypropylene is soft and the parts deform instead of welding together. Later, when under pressure, the parts come apart. Such a joint would be unacceptable in a semisolid product dispenser, as the dispenser head could come apart when the product was forced through it, causing the gel deodorant or other semisolid product to gush out and make a mess in the hands of the user as the joint came apart. Other thermoplastic materials could be used, but their cost would be a significant disadvantage where the dispenser is made in mass quantities and only used once before being thrown away.
- The foregoing problems, as well as other difficulties encountered during development of a semisolid product dispenser head, have been overcome by the present invention. A porous material made from an extrusion of strands of polymer has been found which provides desired properties in making a head for a semisolid product dispenser. Also, it has been discovered that the opening size and shapes of the openings of a porous media can be improved for use in a semisolid product dispenser by crushing the media between two hard surfaces, such as parts of a mold tool. Further, an ultrasonic weld joint has been developed which can be used to securely join inexpensive polypropylene.
- In a first aspect, the invention is a method of making a head for a semisolid product dispenser comprising the steps of providing a piece of porous media having a desired shape with a perimeter and openings through the media in the area inside of the perimeter; compressing at least the portion of the media inside of the perimeter between two parts of a hard tool so as to crush the media, thereby reducing the size of the openings; and affixing the porous media to a head frame to form the semisolid product dispenser head.
- In a second aspect, the invention is the method of making a head for a semisolid product dispenser comprising the steps of providing a piece of porous media made of multiple layers of extruded strands wherein the strands are generally coplanar and parallel to one another within each layer and the strands in one layer are non-parallel to strands in an adjoining layer and bonded to the strands in the adjoining layer at crossover points between the strands; and insert molding the piece of porous media with a thermoplastic material into a head frame to thereby produce a head for a semisolid product dispenser.
- In a third aspect, the invention is an improved porous media where the porous media has multiple layers of extruded strands of polymer with the strands in each layer being generally coplanar and parallel to one another, the direction of the strands in one layer being non-parallel to the strands in an adjoining layer, the strands being bonded to the strands in the adjoining layer at crossover points between the strands, and the media having openings through the media defined by spaces between the strands in one layer superimposed over spaces between strands in the adjoining layer, improved in that the average size of the openings through the media are reduced by crushing the strands of one layer against the strands of an adjoining layer, thereby flattening the strands and reducing the size of the spaces between the strands.
- In a fourth aspect, the invention is an improved dispenser for dispensing a semisolid product where the dispenser includes a hollow body containing a semisolid product and a piston to force the semisolid product out of the hollow body through a porous media affixed to a head secured on the body, improved in that the porous media comprises multiple layers of extruded strands of polymer wherein the strands in each layer are generally coplanar and parallel to one another, the direction of the strands in one layer being non-parallel to the strands in an adjoining layer, the strands being bonded to the strands in the adjoining layer at crossover points between the strands, and the media having openings through the media defined by spaces between the strands in one layer superimposed over spaces between strands in the adjoining layer.
- In a fifth aspect, the invention is a method of reducing the pore size of a porous media comprising the steps of providing a porous media comprising multiple layers of extruded strands of polymer wherein the strands in each layer are generally coplanar and parallel to one another, the direction of the strands in one layer being non-parallel to the strands in an adjoining layer, the strands being bonded to the strands in the adjoining layer at crossover points between the strands, and the media having openings through the media defined by spaces between the strands in one layer superimposed over spaces between strands in the adjoining layer; and compressing the media between two opposing hard surfaces so as to flatten the individual strands, thus making the strands wider in a direction perpendicular to the hard surfaces, thereby reducing the size of the openings between the strands.
- In a sixth aspect, the invention is a method of making a semisolid product dispenser comprising the steps of providing a head frame with a top end and a sidewall depending from the top end; providing a body member that mates with the head frame, defining a deodorant holding and distribution space between the top end and the body member; providing mating ultrasonic weld joint surfaces on the head frame and the body member that provide a weld joint and a positive stop; and ultrasonically welding the body member and head frame together.
- In a seventh aspect, the invention is a semisolid product dispenser comprising a head frame having a top end and a sidewall depending from the top end, the top end having a porous media attached thereto; a body member having an outer wall inside of the sidewall, the head top end and body member having a semisolid product holding and distribution space between them; and the body member outer wall being ultrasonically welded to the head frame to provide a leak-free joint so that all semisolid product in said body member may be forced out of said holding and distribution space through the porous media.
- In an eighth aspect, the invention is a method of reducing the pore size of a porous media comprising the steps of providing a porous media having a first average thickness with openings therethrough creating a first average pore size; and compressing the media between opposing surfaces on a core and a cavity of a mold tool so as to reduce the average thickness of the media and to reduce the size of the openings through the media to create a second average pore size smaller than the first average pore size.
- In a ninth aspect, the invention is a method of making a head for a semisolid deodorant dispenser comprising the steps of providing a piece of generally flat porous media having a perimeter; forming the porous media into a dome shape; and attaching the perimeter to a head frame having a central opening therethrough such that the dome shape of the media is retained, the media and the dome shape formed being rigid enough such that even though the media is supported only by its edges, the dome does not collapse when the head is pressed against underarm skin with normal user force sufficient to spread deodorant forced through the media across the skin.
- In a tenth aspect, the invention is a deodorant dispenser comprising a body holding a semisolid deodorant and a dispensing head, the dispensing head having a frame with a central opening therethrough and a porous media shaped in the form of a dome convex of the rest of the head, the media having a perimeter which is attached to the head frame, the dome extending over the central opening, and the media being sufficiently rigid when in the dome shape such that the dome does not collapse when the head is pressed against underarm skin with normal user force sufficient to spread semisolid deodorant forced through the media across the skin.
-
FIG. 1 is a cross-sectional perspective view of a preferred semisolid product dispenser incorporating aspects of the present invention using a woven media. -
FIG. 2 is an exploded view of the top portion of the semisolid product dispenser ofFIG. 1 using an extruded media. -
FIG. 3 is a cross-sectional view of the top portion of the semisolid product dispenser taken along line 3-3 ofFIG. 2 , except that a woven media is depicted. -
FIG. 4 is a plan view of the preferred extruded, porous media used in the semisolid product dispenser ofFIG. 2 . -
FIG. 5 is a cross-sectional view of the porous media taken along line 5-5 ofFIG. 4 . -
FIG. 6 is a cross-sectional view of the semisolid product transfer member taken along line 6-6 ofFIG. 2 , showing a vent. -
FIG. 7 is a cross-sectional view of the semisolid product transfer member taken along line 7-7 ofFIG. 2 . -
FIG. 8 is a cross-sectional view of the head frame with a porous media insert molded therein, taken along line 8-8 ofFIG. 2 . -
FIG. 9 is a cross-sectional view of the head frame ofFIG. 8 welded to semisolid product transfer member ofFIG. 7 . -
FIG. 10 is a cross-sectional view of a mold tool used to make an alternative embodiment of a semisolid product dispenser head. -
FIGS. 10A, 10B and 10C are each cross-sectional views of a part of the mold tool ofFIG. 10 in different operating positions. - The present invention will be described in terms of a dispenser for a gel deodorant because the currently preferred semisolid product dispenser is designed for a gel deodorant. However, it should be understood that the invention is applicable to other semisolid products, such as cream or soft-stick deodorants. Further, some aspects of the invention have utility in other products beside deodorant dispensers, such as shaving cream, insect repellant, medicinal agents and other compositions applied to the skin.
- A preferred embodiment of the
gel deodorant dispenser 10 of the present invention is shown inFIGS. 1-9 . Thedispenser 10 is made of three main sections, abody 20, aneck 30 and a dispensinghead assembly 50. Acap 18 is usually included to cover thehead assembly 50 when not in use. - The
body 20 andneck 30 were developed by others. The details of their construction are not important except to the extent that thehead 50 cooperates with thebody 20 andneck 30. However, as best understood by the present inventors, thepreferred body 20 andneck 30 of thegel deodorant dispenser 10 are shown inFIGS. 1 and 2 . - The
body 20 is made with abase 23 andupstanding walls 21, and is hollow so that it can house the gel deodorant material. Apiston 22 is mounted onscrew 24 so that asscrew 24 is turned, thepiston 22 rides up inside ofwalls 21, forcing gel inside the body upward. The top ofbody 20 is closed bylid 28 except for two gel ports 25 (FIG. 2 ). The top 26 ofscrew 24 is journaled in another opening throughlid 28. - The
neck 30 includes twogel transfer tubes 35 that mate withgel ports 25 when theneck 30 is attached tobody 20. Also,neck 30 includes a structure for turningscrew 24, in this case aratchet 36 andpawl 37. In the embodiment depicted, theneck 30 has a window 31 (FIG. 2 ) in which a push button 32 (FIG. 1 ) is mounted.Button 32 is connected by aslide arm 34 to activateratchet 36 mounted on the top ofscrew 24. (Thebutton 32 andslide arm 34 are not shown inFIG. 2 for sake of clarity.)Guides 39 molded on the bottom ofshelf 38 cooperate to guide theslide arm 34. In addition to the openings for thegel transfer tubes 35, theshelf 38 has two holes, a round hole where the top 26 ofscrew 24 comes up, and a rectangular hole under apawl 37 so that thepawl 37 is free to flex asratchet 36 is rotated forward. Thepawl 37 prevents theratchet 36 from turning backwards after having been activated by theslide arm 34. In this way, asbutton 32 is pushed, ratchet 36 and screw 24 rotate, causingpiston 22 to raise, forcing gel deodorant out of thehollow body 20, throughgel ports 25 andgel transfer tubes 35 to the head assembly. The sidewalls of theneck 30, thegel transfer tubes 35, theshelf 38, theguides 39 and thepawl 37 are all molded as one piece. - As best shown in
FIG. 2 ,head assembly 50 is made of three main parts, aporous media 60, ahead frame 70 and a geltransfer body member 80. Theporous media 60 generally starts out as a flat piece of material that is die-cut from a larger piece and then insert molded as thehead frame 70 is injection molded. Thegel transfer member 80 is molded separately, and then thehead frame 70 andgel transfer member 80 are welded together, as explained in more detail below. - The porous media could be a woven screen (as shown in
FIGS. 1 and 3 ), but more preferably the porous media is a material supplied by Nalle Plastics Inc. of Austin, Tex. (shown inFIGS. 2, 4 and 5), under the tradename of Naltex, and is preferably modified as described below. The Naltex material is made from at least two layers of extruded strands. The strands in each layer are generally coplanar and parallel to one another, as shown inFIGS. 5 and 6 . Thestrands 62 in one layer are non-parallel to thestrands 64 in an adjoining layer. The strands are bonded to the strands in the adjoining layer at crossover points between the strands. - One of the benefits of the Naltex material is that the surface is textured. The strands produce a ribbed effect on the surface. This ribbed effect helps to evenly spread a deodorant or other material as it is applied to the skin. It also prevents clogging that would be more likely to occur if the surface were smooth.
- The
media 60 has openings 66 (FIG. 4 ) defined by spaces between thestrands 62 in one layer that are superimposed over spaces between thestrands 64 in the adjoining layer. The preferred material has thestrands 62 in one layer oriented at an angle of between about 20° and 90° compared to thestrand 64 of the adjoining layer. The preferred Naltex material is flattened as shown inFIG. 5 so thatstrands openings 66, but still leaving a textured or ribbed surface. Since it is difficult to extrude a material with a small pore size, this step of crushing the media provides an innovative method of obtaining an inexpensive media with a desired small pore size for use in making a gel deodorant dispenser head assembly. - The
head frame 70 is preferably molded from thermoplastic material, such as polypropylene. Thehead frame 70 has atop end 72 with a central opening 74 therethrough.Sidewalls 76 depending from thetop end 72 extend around the entire perimeter of thehead frame 70. An internal ridge 78 (FIG. 8 ) is formed on the inside of the frame member, just inside from the central opening 74. Thisridge 78 is used in an ultrasonic welding process, described below. - After the
porous media 60 has been cut into an oval shape, it is loaded into an injection mold tool that is used to form thehead frame 70. As shown inFIG. 8 , thecore 102 of the tool has alip 104 around the perimeter of the center portion of the core. Thislip 104 is used to create a band 69 (FIG. 2 ) around theperimeter 68 of the porous media where all theopenings 66 are closed off. Thisband 69 is the result of the lip crushing thestrands strands band 69. This prevents the hot plastic used to form the head frame from infiltrating into the central portion of the porous media and blocking theopenings 66. This band also serves another function in the finished product. As gel is forced through themedia 60, it cannot flow through the area where theband 69 is formed. As a result, there is a visible demarcation between where gel is forced through themedia 60 and where gel is not forced through the media. Preferably that line of demarcation is inside of the inner edge of the central opening 74. - Preferably, the
perimeter 68 of the piece of media is bent inwardly (as shown inFIG. 8 ) by a ridge formed on the mold tool cavity. This results in a clean appearance as the edge of theporous media 60 is encapsulated or embedded in the plastic of the head frame, rather than “floating” near the surface where it could be seen, or worse yet, make for sharp protruding edges. - The closing of the
mold tool 102 preferably not only createsband 69, but it also crushes the media so that theopenings 66 are reduced in size. Hence, the gap between the core 102 and the cavity of the mold tool will be slightly less than the original thickness of themedia 60. Themold tool 102 also forms themedia 60 into a dome shape as thecore 102 is convex and the cavity is concave. The dome shape is then maintained once the tool is opened because themedia 60 is sufficiently rigid to maintain the dome shape when its edges are embedded in the head frametop end 72. The dome shape and the rigidness of theporous media 60 are preferably sufficient so that, even though the media is supported only at its edges, the dome does not collapse when thehead 50 is pressed against underarm skin with normal user force sufficient to spread gel forced through the media across the skin. This rigidity thus prevents “overdosing.” - If the gel deodorant is found to come through the porous media at a faster rate in the area where the gel transfer tubes terminate than in other parts of the media, the mold tool can be modified to cause greater crushing of the media in the areas where flow needs to be retarded. The greater crushing causes the
openings 66 in those areas to be smaller, thus retarding the flow. Either the core pin or the mold tool, or both, can be modified to reduce the gap between them in the areas where the gel transfer tubes empty out. This preferably produces a graduated size for the openings with respect to their position on the surface of the head, with a region having a smaller average pore size than the average pore size outside of the region. However, the amount of gel that comes through is preferably uniform across the surface of thehead 50, except that no gel comes through the area inside ofband 69. - The gel
transfer body member 80 has outer walls that mate with thehead frame 70, inside thesidewalls 76, defining a deodorant holding and distribution space 82 (FIG. 3 ) between thetop end 72 of the head frame, theporous media 60 and thegel transfer member 80. Thegel transfer member 80 also has two funnel-shapedmembers 84 that terminate in rounded ends 85 that fit in the top ofgel transfer tubes 35. As seen inFIG. 3 , the top of eachgel transfer tube 35 preferably has an internal rim 41 that co-acts with anexternal rib 86 on each of theends 85 to form a snap fit, holding thehead assembly 50 onto theneck 30 once the parts are assembled. - The
gel transfer member 80 has a groove 88 (FIGS. 6 and 7 ) which is used to form the ultrasonic weld. It also has an energy-directingpoint 91 which is used in the weld. Twovents 92 are located at the bottom of thegroove 88, directly opposite from one another on the sides of the gel transfer member. One of thesevents 92 is shown inFIG. 6 . The other vent is not shown. These vents allow any gas trapped in thegroove 88 when the weld is made to escape out from between the parts. - The
ridge 78 acts as a tongue and cooperates withgroove 88 to form a tongue-and-groove joint, best seen inFIG. 9 . This joint is a double shear joint, as theridge 78 is wider at its bottom than the bottom 89 ofgroove 88. Meanwhile, energy-directingpoint 91 melts into the underside oftop end 72. Thus, when the parts are welded together, there are two types of welds made. - In addition, the weld design incorporates a positive stop. A
positive stop surface 93 on thegel transfer member 80 contacts apositive stop surface 79 on the head frame when the weld has progressed to a sufficient depth. By designing in a positive stop, the welding operation can be carried out for longer lengths of time without fear of destroying the pieces. Thus, a more solid and leak-free joint can be formed, even when polypropylene is used for thehead frame 70 andgel transfer member 80. Then, during use, these parts will not come apart, even when the gel is under pressure and the head is rubbed against underarm skin. Rather, all of the gel transferred to thegel transfer member 80 is forced out of the deodorant holding anddistribution space 82 through theporous media 60. - The Naltex material is preferably crushed in the mold tool. However, it would also be possible to put a sheet of Naltex material through calender rolls and crush the strands prior to cutting the porous media into a desired shape. One of the benefits of using the mold tool for the crushing operation is that the crushing can be done in the same step as the insert molding, and areas of reduced size openings can be made in the correct position with respect to the gel transfer tubes.
- The crushing step usually reduces the thickness of the material to between about 20% and about 90% of its original thickness. The media preferably has a first average thickness of between about 0.01 and about 0.1 inches, most preferably about 0.05 inches. This preferred media is crushed to a second average thickness of between about 0.035 and about 0.04 inches. In the area of
band 69 the preferred material is crushed to a thickness of about 0.02 inches. The compression step normally changes the shape of the openings. More importantly, it usually changes the size of the openings. The average opening size of the media in the area inside of the perimeter formed byband 69 will preferably be reduced by at least 10%, and more preferably by at least 30%, and even as much as 50% by crushing. A preferred material may have an average opening size greater than 30,000 square microns before crushing, and after being crushed will have an average opening size of less than 30,000 square microns. For a gel deodorant dispenser, preferably the opening size of the crushed media will be less than 40,000 square microns. More preferably, the average opening size will be between about 900 and about 30,000 square microns. Of course the desired opening size will depend on the viscosity and other properties of the deodorant. For some deodorant materials a preferred opening size after crushing would be less than 10,000 square microns, such as a 60 micron square opening. The open area may be reduced from about 20-30% to about 5% by the crushing operation. -
FIGS. 10, 10A , 10B and 10C depict another embodiment of the invention. In this embodiment, the porous media is formed as part of the injection molding of thehead frame 170, which is comparable to thehead frame 70 inFIGS. 1-9 . Themold tool 202 for forming thehead frame 170 includes multitudes of small core pins 206 which are initially extended to abut thecavity tool 201. As thehead frame 170 is formed, theporous media 160 is also formed as part of the injection mold, andopenings 166 in theporous media 160 result from the core pins 206. After the first stage of the process (FIG. 1A ), while the mold tool is still closed, thepins 206, attached toplate 212, are withdrawn (FIG. 10B ). At this point, themold tool front 210 is then closed more tightly against the mold cavity 201 (FIG. 10C ). This results in theporous media 160 being crushed between the two hardmold tool parts holes 166 through themedia 160 to become smaller. As a result, it is possible to makeholes 166 in an injected moldedmedia 160 smaller than the size of the core pins 206. This is significant because there are practical limits on the size of core pins 206. Therefore, ifsmaller holes 166 are desired in themedia 160, they can be formed in a crushing operation. Just as with crushing theporous media 60, this crushing can take place in the same mold tool as is used to injection mold thehead frame 170. - The preferred Naltex material is extruded using two layers of strands, with about 33, and preferably about 36 strands per inch in each layer. This type of material may be ordered from Nalle Plastics as Naltex S 1970. It has a thickness of about 0.051 inches and openings of about 200 microns square (40,000 square microns). After being crushed the openings are about 170 microns by 150 microns (25,500 square microns).
- The use of a crushing step to reduce pore size would also be applicable to porous media made from weaving, casting, needle punching, water jets and laser drilling, as well as extrusion and injection molding described above. The media from Naltex is made from polypropylene. However, the media could be made of other polymers such as polyethylene, nylon, polyester or combinations thereof. Polypropylene is preferred because it is inexpensive and easily crushed.
- Preferably, the percent open area of the porous media will be between about 1% and about 50%, and more preferably at least 2%. The
band 69 where the openings have been completely closed is preferably about one-eighth inch wide. In the preferred embodiment, the angles shown inFIGS. 6-8 are A=5°, B=10°, C=5°, D=5° and E=1°. Theenergy directing point 91 preferably has a 45° slope on the point. - One of the benefits of using the positive stop surfaces 79 and 93 is that the position of the
gel transfer member 80 with respect to thehead frame 70 in thefinal head assembly 50 is very consistent. This results in the position of theexternal ribs 86 being precise with respect to the rest of thehead assembly 50. Thus when thehead 50 is snapped onto theneck 30, theribs 86 catch under rims 41 to hold the neck and head securely. - Rather than affixing the porous media to the
top end 72 of thehead frame 70 by insert injection molding, the porous media could be welded onto the head frame by solvent welding, heat molding, ultrasonic welding or other methods of attachment. - It should be appreciated that the products, apparatus and methods of the present invention are capable of being incorporated in the form of a variety of embodiments, only a few of which have been illustrated and described above. The invention may be embodied in other forms without departing from its spirit or essential characteristics. For example, instead of molding the head frame and crushing the media in the same tool, those steps could be carried out in different tools. Instead of crushing the media to decrease its average pore size, other methods of reducing the pore size, such as the application of heat, could be used. Instead of using the
body 20,neck 30 and geltransfer body member 80, the deodorant dispenser could simply have a hollow body with a piston inside, and thehead frame 70 could be welded directly to that body. - The described embodiments are to be considered in all respects only as illustrative and not restrictive, and the scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (19)
1-43. (canceled)
44. A method of making a semisolid product dispenser comprising the steps of:
a) providing a head frame with a top end and a sidewall depending from the top end;
b) providing a body member that mates with the head frame, defining a semisolid product holding and distribution space between the top end and the body member;
c) providing mating ultrasonic weld joint surfaces on the head frame and the body member that provide a weld joint and a positive stop; and
d) ultrasonically welding the body member and head frame together.
45. The method of claim 44 wherein the weld joint comprises a double shear joint.
46. The method of claim 45 wherein the weld joint further comprise an energy-directing point.
47. The method of claim 44 wherein the weld joint comprises a tongue and groove weld joint with double shear welds and an energy-directing weld point.
48. The method of claim 44 wherein the weld joint comprises at least one vent to allow escape of air otherwise trapped between the weld joint surfaces.
49. The method of claim 47 wherein the tongue is on the transfer member and the groove is on the head frame.
50. The method of claim 44 wherein the step of providing a head frame comprises injection molding thermoplastic material in the form of the head frame.
51. The method of claim 50 wherein a sheet of porous material is insert molded at the top end of the head frame as the head frame is molded.
52-55. (canceled)
56. A method of making a head for a semisolid deodorant dispenser comprising the steps of:
a) providing a piece of generally flat porous media having a perimeter;
b) forming the porous media into a dome shape; and
c) attaching the perimeter to a head frame having a central opening there through such that the dome shape of the media is retained, the media and the dome shape formed being rigid enough such that even though the media is supported only by its edges, the dome does not collapse when the head is pressed against underarm skin with normal user force sufficient to spread semisolid deodorant forced through the media across the skin.
57. The method of claim 56 wherein the perimeter of the media is secured to the head frame by being insert molded into the head frame as the head frame is formed.
58. The method of claim 56 wherein openings through the porous media in a band around the perimeter are blocked such that flow of deodorant through the media only occurs in the area interior of said band.
59. The method of claim 58 wherein the band of blocked openings has an outer edge sealed to the head frame and an inner edge not sealed to the frame, such that as semisolid deodorant is forced through the media a user is able to see a demarcation between where the semisolid deodorant is forced through the media and semisolid deodorant cannot be forced through said blocked openings, that demarcation being inside of the edge of the central opening of the head frame.
60. The method of claim 56 wherein the porous media is heat molded to the head frame.
61. The method of claim 56 wherein the media is formed into a dome shape between two halves of a mold tool, one half having a concave shape and the other half having a convex shape.
62-68. (canceled)
69. The method of claim 44 wherein the body member comprises a transfer member.
70. (canceled)
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Cited By (2)
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US11382400B2 (en) | 2018-08-10 | 2022-07-12 | Go Products Co. | Material applicator |
US12075901B1 (en) | 2022-07-12 | 2024-09-03 | Go Products Co. | Material applicator |
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CA2313069C (en) * | 1999-07-01 | 2006-05-09 | Filtertek Inc. | Semisolid product dispensing head |
FR2810859B1 (en) | 2000-06-28 | 2002-09-06 | Oreal | PACKAGING AND APPLICATION DEVICE HAVING A PREFERRED SUPPLYED APPLICATION SURFACE IN PRODUCT |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11382400B2 (en) | 2018-08-10 | 2022-07-12 | Go Products Co. | Material applicator |
US12075901B1 (en) | 2022-07-12 | 2024-09-03 | Go Products Co. | Material applicator |
Also Published As
Publication number | Publication date |
---|---|
DE60027823T2 (en) | 2006-10-19 |
EP1072214A3 (en) | 2001-03-21 |
US6890119B2 (en) | 2005-05-10 |
US6450722B1 (en) | 2002-09-17 |
EP1072214A2 (en) | 2001-01-31 |
DE60037150T2 (en) | 2008-09-11 |
EP1072214B8 (en) | 2007-03-21 |
EP1618812B1 (en) | 2007-11-14 |
CA2313069C (en) | 2006-05-09 |
DE60037150D1 (en) | 2007-12-27 |
ES2297571T3 (en) | 2008-05-01 |
EP1618812A1 (en) | 2006-01-25 |
US20030095827A1 (en) | 2003-05-22 |
EP1072214B1 (en) | 2006-05-10 |
DE60027823D1 (en) | 2006-06-14 |
CA2313069A1 (en) | 2001-01-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |