US3637454A - Feeding mat - Google Patents
Feeding mat Download PDFInfo
- Publication number
- US3637454A US3637454A US3637454DA US3637454A US 3637454 A US3637454 A US 3637454A US 3637454D A US3637454D A US 3637454DA US 3637454 A US3637454 A US 3637454A
- Authority
- US
- United States
- Prior art keywords
- mat
- plies
- strip
- ply
- feeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 19
- 229920002457 flexible plastic Polymers 0.000 abstract description 4
- 239000004033 plastic Substances 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 238000003466 welding Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 235000013305 food Nutrition 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229920001169 thermoplastic Polymers 0.000 description 4
- 239000004416 thermosoftening plastic Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 102100026115 S-adenosylmethionine synthase isoform type-1 Human genes 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 235000001543 Corylus americana Nutrition 0.000 description 1
- 240000007582 Corylus avellana Species 0.000 description 1
- 235000007466 Corylus avellana Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 230000008571 general function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Images
Classifications
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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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
- A47D15/00—Accessories for children's furniture, e.g. safety belts or baby-bottle holders
- A47D15/001—Mattresses
- A47D15/003—Mattresses foldable, e.g. baby mats
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47D—FURNITURE SPECIALLY ADAPTED FOR CHILDREN
- A47D5/00—Dressing-tables or diaper changing supports for children
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G11/00—Table linen
- A47G11/003—Table-cloths
-
- 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
- B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
-
- 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
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
- B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
- B29C65/7441—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for making welds and cuts of other than simple rectilinear form
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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
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap 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
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/133—Fin-type joints, the parts to be joined being flexible
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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
- B29C66/246—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 forming figures, e.g. animals, flowers, hearts
-
- 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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/436—Joining sheets for making articles comprising cushioning or padding materials, the weld being performed through the cushioning material, e.g. car seats
-
- 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
- B29C66/72—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
- 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
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
-
- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
-
- 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
- B29C66/71—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 composition of the plastics material of the parts to be joined
-
- 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
- B29C66/731—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 intensive physical properties of the material of the parts to be joined
- B29C66/7314—Electrical and dielectric properties
- B29C66/73143—Dielectric properties
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
- B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
-
- 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
- B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
- B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/233—Foamed or expanded material encased
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
Definitions
- the mat is formed of a base ply [58] Field of Search 161/44, 149, 160, 161, 1 18; of foamed resilient flexible plastic and a top ply of nonfoamed 248/346,]; 206/72; 156/309; D44/l3.l, l4 flexible plastic.
- a thick border strip of foamed flexible resilient plastic is interposed between the plies and within the [56] References Cited marginal zone, and the two plies are subsequently heat sealed to one another along their peripheries.
- a still further object of the present invention is to provide a feeding mat of the character described which is soft :and flexible, providing maximum safety to a young child, while remaining resilient and durable.
- Yet another object of the present invention is to'provide a feeding mat of the character described which is not only easy to wash but also facilitates wiping and removal of spilled or dropped foods.
- a still further object of the present invention is to provide a feeding mat of the character described wherein the uppersurface of the mat is liquid impermeable with the portions adjacent the peripheral edges of said upper surface resiliently projecting upwardly to provide a ridgefor preventing the out flow of spilled foods.
- the invention accordingly consists in the features of construction, combinations of elements and arrangements of parts which will hew-exemplified in the feeding 'mat ahereinafter described and of which the scope of applicationvwill be indicated in the appended claims.
- FIG. 1 is a top view of a feeding mat constructed in accordance with and embodying'the instant invention
- FIG. 2 is an enlarged fragmentary sectional view through the feeding mat, the same being taken substantially along the line 2--2 of FIG. 1 and showing the' top and bottom plies of thermoplastic sheet material of which the mat is constructed, as well as the upstanding peripheral ridge formed by a thick border strip of foamed material and sandwiched between the plies;
- FIG. 3 is a fragmentary view of a corner of the bottomof the feeding mat
- FIG. 4 is an isometric fragmentary exploded view of the components of the feeding mat during the assembly.
- FIG. 5 is an enlarged fragmentary sectional view illustrating a step during the construction of the feeding mat and specifically showing a heat-sealing steel rule die and platen prior to engagement with the feeding mat components.
- DESCRIPTION OF THE PREFERRED EMBODIMENT further heat-sealed seam between the base and top plies extends substantially parallel to peripheries of the two plies and is spaced inwardly of the first seam.
- the border strip is sandwiched between the two plies.
- the border strip is tightly .compressed between the two plies so that the ensuing peripheral ridge has a rounded upper surface. Because of the use of the materials just mentioned, the entire mat is soft and flexible, yet resilient and durable.
- the mat seams are fonned by a heat-sealing process which includes the use of a steel rule die activated by a high-frequency'electric welding apparatus.
- the reference number 10 denotes a feeding mat constructed in accordance withand embodying the present invention.
- the mat is form ed of a laminated structure including a base ply 12 of a soft resilient flexible synthetic thermoplastic, e.g., of foamed polyvinyl chloride.
- the base ply sheet material preferably has an unstressed thickness in the order of inch to provide the desired resiliency and soft texture for the mat.
- the undersurface of thebaseply includes a liquid impermeable layer or skin 14. This skin serves to prevent any of the spilled liquids which are on the table top adjacent or beneath the mat from entering into and being absorbed by the base ply. Washing and cleaning of the entire.
- feeding mat is also facilitated because the skin 14 prevents absorption of the washing liquids by the foamed base ply.
- the use of a foamed material for this ply makes the undersurface rough so that it has an antiskid characteristic and thus tends to remain where positioned, resisting lateral displacement forces applied by an infant making brushing movements as infants are prone to do.
- the foamed material of the base ply is the major contributing factor to the softness and resiliency of the mat which minimizes the possibility of self-inflicted damage by an infant who bangs a hand, limb or head on the table top in a tantrum or effort to gain attention.
- a top ply 16 is also provided, said top ply being of the same length and width as the base ply so that the common edges of both plies may be located in registry to form a composite mat in accordance with the invention.
- the top ply is a soft flexible synthetic. thermoplastic compatible with the material of the base ply, e.g., polyvinyl chloride. It is not foamed and has a smooth, e.g., polished, top surface so that it is easy to wipe off and is visually attractive.
- the base and top plies are heat sealed to one another along their common peripheral edges by a peripheral seam 18.
- the feeding mat 10 includes a ridge 22 in a marginal zone adjacent the inner side of the seam 18.
- the ridge 22 serves to prevent the flow of spilled liquids from the feeding mat onto the table by maintaining such liquidsin the area surrounded by the marginal zone.
- a thick narrow strip 20 of foamed soft flexible resilient material e.g., foamed polyurethane, foam rubber or foamed polyvinyl chloride. This need not be compatible with the material of the base and top plies.
- the strip 20 is interposed between the top and bottom plies and within the marginal zone.
- the strip is foamed, soft and resilient, the ensuring ridge22 is incapable 'of harming an infant willfully striking himself against the mat, as would the hard unyielding peripheral flanges of a metal or hard plastic feeding tray.
- the thick strip is in a shape which conforms with the mat shape, e.g., rectangular to conform with a rectangular mat. It should be mentioned that the plan shape of the mat is not a feature of the invention.
- An area 25 of the mat surrounded by the ridge 22 is generally fiat and upon this area the infant's feeding bowl is placed. It is because foods will be splattered about and spilled on the top ply 16 that it is formed of a liquid impervious nonfoamed plastic sheet. If it is desired to have this interior smooth, the top and bottom plies are only joined by the heat welds at the seams 18 and 24.
- the area 25 of the feeding mat may be decorated with the use of a heat-welding die which will provide decorative seams 26 in a desired pattern.
- the seams 26 are surfaces wherein there is a heat-sealed welded seam between the two plies 14, 16 resulting in welded depressions on both plies.
- the feeding mat is assembled and constructed is an additional feature of the invention.
- the feeding 'nat components i.e., the top ply 16, the thick border strip 20 and the base ply 14, are assembled and aligned for heat welding in an assembly frame 30.
- the sheets forming the top and base plies are cut to dimensions larger than the finished mat so that a border extends beyond the area which ultimately will be enclosed by the peripheral seam 18.
- Within this border area there is provided a plurality of locating holes 32 and 33 in the top 16 and base 14 plies, respectively.
- the holes 32, 33 in both plies are in registry when the plies themselves are in alignment.
- the frame includes a plurality of projecting placement pins 34.
- Each of the pins 34 are spaced and positioned to be registered with the holes 32, 33 when the aligned plies 14, 16 are placed over the frame. With the pins projecting through the holes, the plies of the mat are maintained in alignment during the heat-sealing process.
- the thick strip 20 is placed between the plies 14, 16 of the composite mat prior to the placing of the top ply 16 over the base ply 12 on the frame.
- the strip 20 includes a similar border zone within which there is provided a plurality of locating holes 36. The border zones of the strip extend beyond the seam 18 of the mat. The holes 36 are spaced to be aligned with the holes 32, 33.
- the base ply 14 is placed on the frame 30 which is rectangular, to conform with a rectangular mat.
- the frame may be of any other appropriate shape, e.g., oval or circular if the mat is so shaped.
- the thick strip 20 is emplaced with the pins 34 projecting through locating holes 36 of the strip 20.
- the top ply is placed over the base ply and strip with pins 34 extending through the locating holes 33. It should be noted that the plies and the thick strip 20 are maintained in their respective aligned positions on the frame by the placement pins 34 which extend through the locating holes 32, 33 and additionally through the locating holes 36 of the thick narrow border strip 20.
- the frame is positioned on a platen 38 of a highfrequency dielectric heat-welding machine.
- the frame 30 is of a larger dimension than the platen 38 so that when the frame is inserted over the platen, the frame will peripherally surround the platen. With the frame in this position (see FIG. 5) the plies l2 and 16, and the foam strip 20 will have their border zones extending beyond the platen 38.
- the platen 38 of the dielectric heat-sealing machine is electrically conductive to act as a platen electrode for a highfrequency dielectric welding machine that is energized by a high-frequency oscillator 40.
- One terminal of the oscillator is connected to said platen electrode 38 as schematically illustrated in FIG. 5.
- the peripheral seam 18 and the parallel inwardly disposed seam 24 are formed by the dielectric welding machine through the cooperation between the platen 38 and a rule die 42 movable toward and away from the platen.
- the rule die 42 includes a block of electrically nonconductive material, e.g., plywood.
- Steel rule die strips 44 and 46 extend through kerfs in the plywood block of the movable die and a metal chase 45 peripherally compresses the block to bind the blocks and die strips together.
- the lower edges of the strips 44, 46 project beneath the block and define closed shapes that appropriately extend against the plies forming the mat when the movable die 40 is lowered to press the plies against the platen 38. These strips form the seams 18, 24.
- the upper edges of the steel strips 44 and 46 are electrically interconnected as by an electrically conductive electrode film or layer 48 which extends over the upper surface of the movable die 42.
- the other terminal of the oscillator is connected to this layer.
- the steel strip 44 forms the peripheral seam 18 and includes a sharp depending knife edge 50 which serves to cut the peripheral edges of the plies l6 and 12 as well as the thick strip 20 at the border zone.
- the excess material which has been cut by the edge 50 is the border zone and includes the openings 32, 33 and 36.
- the strip 46 forms the inner seam 24.
- the frame 30 with the mat plies and thick strip mounted thereon is inserted over the platen 38, the movable die 42 is then lowered over the platen and pressed against the plies of the mat. This action compresses the strip 20. Thereupon the high-frequency oscillator is energized. The highfrequency oscillations between the steel strips and the platen electrode base 38 results in a dielectric heating which autogenously fuses the plies together around the edges of the strip and captures the thick strip 20 between the plies. Subsequently, the movable die 42 is raised and the frame removed from the platen.
- the border zones are stripped from the peripheral seam 18, It should be noted that because the strip 20 was compressed between the movable die 42 and the platen during welding, the strip will be under residual compression after the movable die has been raised. The strip urges the top ply 16 upward, forming the ridge 22. Because the plies are joined by the seams 18, 24 along the side edges of the ridge 22, the peripheral ridge is rounded.
- a feeding mat comprising: a soft base ply of resilient flexible foamed synthetic thermoplastic sheet material the undersurface of which has a liquid impervious skin and a rough antiskid surface, a coextensive top ply of a liquid impervious sheet of flexible synthetic unfoamed thermoplastic material, said plies having their common peripheral edges in registry, a marginal zone of said plies lying alongside the common peripheral edges, an elongate strip of foamed soft resilient flexible material, said strip being interposed between said plies and within said marginal zone, a first seam joining said plies along their common peripheral edges, a second seam joining the said plies, said second seam being spaced inwardly from the first seam, said marginal zone being interposed between said seams, said second seam peripherally enclosing an area of said top ply, the portion of said top ply within said area lying substantially within a plane, the portion of said top ply within said marginal zone being elevated from the plane of said area, the foamed base ply serving to resiliently support the
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- Laminated Bodies (AREA)
Abstract
An infant''s feeding mat is provided with a substantially flat bottom and an upstanding ridge lying within a marginal zone adjacent the peripheral edges. The mat is formed of a base ply of foamed resilient flexible plastic and a top ply of nonfoamed flexible plastic. A thick border strip of foamed flexible resilient plastic is interposed between the plies and within the marginal zone, and the two plies are subsequently heat sealed to one another along their peripheries. An additional heat sealed seam between the plies surrounds the inner border of the strip and encloses the strip. The strip is held under compression between the plies and imparts the ridge to the mat.
Description
I United States Patent [151 3,637,454 Pavernick 1 Jan. 25, 1972 54] FEEDING MAT 2,777,626 l/1957 French ..229/2.5 2,893,163 7/1959 Hazel... 248/3461 1 Inventor: Stanford Pave-mick, d Alien Manufac- 5 3,195,847 7/1965 Squires ..248/346.1
turing Co., 115 Grand St., New York, N.Y. 10013 Primary Examiner-Harold Ansher Assistant Examiner-Jose h C. Gil [22] Ffled' 2 Attorney-Kirschflein, KiEschstein, Ottinger & Frank [21] Appl. No.: 857,522 1' g ,5 [57] 1 ABSTRACT [52] U.S.Cl ..161/44, 156/309, 161/118, An infants feeding mat is provided with a substantially flat 161/149, 161/160, 161/161, 206/72, 248/346 bottom and an upstanding ridge lying within a marginal zone [51] Int. Cl. ..B32b l/04, 865d 1/34 adjacent the peripheral edges. The mat is formed of a base ply [58] Field of Search 161/44, 149, 160, 161, 1 18; of foamed resilient flexible plastic and a top ply of nonfoamed 248/346,]; 206/72; 156/309; D44/l3.l, l4 flexible plastic. A thick border strip of foamed flexible resilient plastic is interposed between the plies and within the [56] References Cited marginal zone, and the two plies are subsequently heat sealed to one another along their peripheries. An additional heat UNITED STATES PATENTS sealed seam between the plies surrounds the inner border of 2,757,478 8/1956 Borland 2206 72 Strip and encbses StriP- The strip is held under 3,122,265 2/1964 [unis I h pression between the plies and imparts the ridge to the mat. 2,004,166 6/1935 Low ..248/346.1 2,597,460 5/1952 Eberhardt ..206/72 4 D'awmg F'gures PATENTEU M825 I972 I II INVENTOR SANDFORD PAVERNICK BY WW, am gg ATTORNEY FEEDING MAT 1. Field of the Invention A feeding mat having upstanding peripheral edges for preventing overflow of liquids that are. spilled during feeding.
2. Description of the Prior Art Articles have been heretofore used to provide protection for a dining table top when. a young child is eating. These usually were in the form of a place mat or sheet although oftentimes rigid metal or plastic trays with flat bottomsand upstanding flanges were used. Additionally used heretofore were high chairs having a small feeding top and flanges at the edges thereof.
These prior devices were deficient in various aspects. For example, there has been a long felt need for an infants feeding tray which was simpler and more attractive than the prior devices. Furthermore, some of the prior devices were difficult to clean and this has always been a problem because young children seldom eat without spilling liquids or dropping food.
A further disadvantage of these prior devices was that because children were prone to bang their head or some other part of their body upon the table, some of the previous feeding trays were liable to harm the child with their hard surfaces and upstanding flanges.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a feeding mat which is so constructed that it is not subject to any of the foregoing disadvantages.
More specifically, it is an object of the invention to provide a feeding mat of the character described which is simple and rugged in construction, yet can be fabricated by mass production methods at an appreciably lower cost than prior devices designed to serve the same general function.
A still further object of the present invention is to provide a feeding mat of the character described which is soft :and flexible, providing maximum safety to a young child, while remaining resilient and durable.
Yet another object of the present invention is to'providea feeding mat of the character described which is not only easy to wash but also facilitates wiping and removal of spilled or dropped foods.
A still further object of the present invention is to provide a feeding mat of the character described wherein the uppersurface of the mat is liquid impermeable with the portions adjacent the peripheral edges of said upper surface resiliently projecting upwardly to provide a ridgefor preventing the out flow of spilled foods.
Other objects of the invention in partwill be obvious and in part will be pointed out herein after.
The invention accordingly consists in the features of construction, combinations of elements and arrangements of parts which will hew-exemplified in the feeding 'mat ahereinafter described and of which the scope of applicationvwill be indicated in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawings in which is shown one of the various possible embodiments of the invention,
FIG. 1 is a top view of a feeding mat constructed in accordance with and embodying'the instant invention;
FIG. 2 is an enlarged fragmentary sectional view through the feeding mat, the same being taken substantially along the line 2--2 of FIG. 1 and showing the' top and bottom plies of thermoplastic sheet material of which the mat is constructed, as well as the upstanding peripheral ridge formed by a thick border strip of foamed material and sandwiched between the plies;
FIG. 3 is a fragmentary view of a corner of the bottomof the feeding mat;
FIG. 4 is an isometric fragmentary exploded view of the components of the feeding mat during the assembly; and
FIG. 5 is an enlarged fragmentary sectional view illustrating a step during the construction of the feeding mat and specifically showing a heat-sealing steel rule die and platen prior to engagement with the feeding mat components.
DESCRIPTION OF THE PREFERRED EMBODIMENT further heat-sealed seam between the base and top plies extends substantially parallel to peripheries of the two plies and is spaced inwardly of the first seam. Thus, the border strip is sandwiched between the two plies. The border strip is tightly .compressed between the two plies so that the ensuing peripheral ridge has a rounded upper surface. Because of the use of the materials just mentioned, the entire mat is soft and flexible, yet resilient and durable. The mat seams are fonned by a heat-sealing process which includes the use of a steel rule die activated by a high-frequency'electric welding apparatus.
Referring now in detail to the drawings, the reference number 10 denotes a feeding mat constructed in accordance withand embodying the present invention. The mat is form ed of a laminated structure including a base ply 12 of a soft resilient flexible synthetic thermoplastic, e.g., of foamed polyvinyl chloride. The base ply sheet material preferably has an unstressed thickness in the order of inch to provide the desired resiliency and soft texture for the mat. The undersurface of thebaseply includes a liquid impermeable layer or skin 14. This skin serves to prevent any of the spilled liquids which are on the table top adjacent or beneath the mat from entering into and being absorbed by the base ply. Washing and cleaning of the entire. feeding mat is also facilitated because the skin 14 prevents absorption of the washing liquids by the foamed base ply. The use of a foamed material for this ply makes the undersurface rough so that it has an antiskid characteristic and thus tends to remain where positioned, resisting lateral displacement forces applied by an infant making brushing movements as infants are prone to do.
In addition, the foamed material of the base ply is the major contributing factor to the softness and resiliency of the mat which minimizes the possibility of self-inflicted damage by an infant who bangs a hand, limb or head on the table top in a tantrum or effort to gain attention.
A top ply 16 is also provided, said top ply being of the same length and width as the base ply so that the common edges of both plies may be located in registry to form a composite mat in accordance with the invention. The top ply is a soft flexible synthetic. thermoplastic compatible with the material of the base ply, e.g., polyvinyl chloride. It is not foamed and has a smooth, e.g., polished, top surface so that it is easy to wipe off and is visually attractive. The base and top plies are heat sealed to one another along their common peripheral edges by a peripheral seam 18.
The feeding mat 10 includes a ridge 22 in a marginal zone adjacent the inner side of the seam 18. The ridge 22 serves to prevent the flow of spilled liquids from the feeding mat onto the table by maintaining such liquidsin the area surrounded by the marginal zone. For this purpose, there is provided a thick narrow strip 20 of foamed soft flexible resilient material, e.g., foamed polyurethane, foam rubber or foamed polyvinyl chloride. This need not be compatible with the material of the base and top plies. The strip 20 is interposed between the top and bottom plies and within the marginal zone. Inasmuch as the strip is foamed, soft and resilient, the ensuring ridge22 is incapable 'of harming an infant willfully striking himself against the mat, as would the hard unyielding peripheral flanges of a metal or hard plastic feeding tray.
The thick strip is in a shape which conforms with the mat shape, e.g., rectangular to conform with a rectangular mat. It should be mentioned that the plan shape of the mat is not a feature of the invention.
To define the inner side of the ridge 22 and hold the strip 20 under compression between the top 16 and base 12 plies, there is a seam 24 joining the top and base plies at the inner side of the marginal zone which is also heat sealed.
An area 25 of the mat surrounded by the ridge 22 is generally fiat and upon this area the infant's feeding bowl is placed. It is because foods will be splattered about and spilled on the top ply 16 that it is formed of a liquid impervious nonfoamed plastic sheet. If it is desired to have this interior smooth, the top and bottom plies are only joined by the heat welds at the seams 18 and 24.
Optionally, the area 25 of the feeding mat may be decorated with the use of a heat-welding die which will provide decorative seams 26 in a desired pattern. The seams 26 are surfaces wherein there is a heat-sealed welded seam between the two plies 14, 16 resulting in welded depressions on both plies.
The manner in which the feeding mat is assembled and constructed is an additional feature of the invention. In accordance with this feature, the feeding 'nat components, i.e., the top ply 16, the thick border strip 20 and the base ply 14, are assembled and aligned for heat welding in an assembly frame 30. The sheets forming the top and base plies are cut to dimensions larger than the finished mat so that a border extends beyond the area which ultimately will be enclosed by the peripheral seam 18. Within this border area there is provided a plurality of locating holes 32 and 33 in the top 16 and base 14 plies, respectively. The holes 32, 33 in both plies are in registry when the plies themselves are in alignment. The frame includes a plurality of projecting placement pins 34. Each of the pins 34 are spaced and positioned to be registered with the holes 32, 33 when the aligned plies 14, 16 are placed over the frame. With the pins projecting through the holes, the plies of the mat are maintained in alignment during the heat-sealing process.
The thick strip 20 is placed between the plies 14, 16 of the composite mat prior to the placing of the top ply 16 over the base ply 12 on the frame. The strip 20 includes a similar border zone within which there is provided a plurality of locating holes 36. The border zones of the strip extend beyond the seam 18 of the mat. The holes 36 are spaced to be aligned with the holes 32, 33.
To assemble the mat, first the base ply 14 is placed on the frame 30 which is rectangular, to conform with a rectangular mat. Of course, the frame may be of any other appropriate shape, e.g., oval or circular if the mat is so shaped. After the base ply is positioned and the pins are disposed in their locating holes 33 the thick strip 20 is emplaced with the pins 34 projecting through locating holes 36 of the strip 20. Subsequently, the top ply is placed over the base ply and strip with pins 34 extending through the locating holes 33. It should be noted that the plies and the thick strip 20 are maintained in their respective aligned positions on the frame by the placement pins 34 which extend through the locating holes 32, 33 and additionally through the locating holes 36 of the thick narrow border strip 20.
After the plies and the strip 20 have been assembled on the frame 30, the frame is positioned on a platen 38 of a highfrequency dielectric heat-welding machine. The frame 30 is of a larger dimension than the platen 38 so that when the frame is inserted over the platen, the frame will peripherally surround the platen. With the frame in this position (see FIG. 5) the plies l2 and 16, and the foam strip 20 will have their border zones extending beyond the platen 38.
The platen 38 of the dielectric heat-sealing machine is electrically conductive to act as a platen electrode for a highfrequency dielectric welding machine that is energized by a high-frequency oscillator 40. One terminal of the oscillator is connected to said platen electrode 38 as schematically illustrated in FIG. 5.
The peripheral seam 18 and the parallel inwardly disposed seam 24 are formed by the dielectric welding machine through the cooperation between the platen 38 and a rule die 42 movable toward and away from the platen. The rule die 42 includes a block of electrically nonconductive material, e.g., plywood. Steel rule die strips 44 and 46 extend through kerfs in the plywood block of the movable die and a metal chase 45 peripherally compresses the block to bind the blocks and die strips together. The lower edges of the strips 44, 46 project beneath the block and define closed shapes that appropriately extend against the plies forming the mat when the movable die 40 is lowered to press the plies against the platen 38. These strips form the seams 18, 24. The upper edges of the steel strips 44 and 46 are electrically interconnected as by an electrically conductive electrode film or layer 48 which extends over the upper surface of the movable die 42. The other terminal of the oscillator is connected to this layer. It should be noted that the steel strip 44 forms the peripheral seam 18 and includes a sharp depending knife edge 50 which serves to cut the peripheral edges of the plies l6 and 12 as well as the thick strip 20 at the border zone. The excess material which has been cut by the edge 50 is the border zone and includes the openings 32, 33 and 36. The strip 46 forms the inner seam 24.
In operation, the frame 30 with the mat plies and thick strip mounted thereon is inserted over the platen 38, the movable die 42 is then lowered over the platen and pressed against the plies of the mat. This action compresses the strip 20. Thereupon the high-frequency oscillator is energized. The highfrequency oscillations between the steel strips and the platen electrode base 38 results in a dielectric heating which autogenously fuses the plies together around the edges of the strip and captures the thick strip 20 between the plies. Subsequently, the movable die 42 is raised and the frame removed from the platen. Thereupon, the border zones are stripped from the peripheral seam 18, It should be noted that because the strip 20 was compressed between the movable die 42 and the platen during welding, the strip will be under residual compression after the movable die has been raised. The strip urges the top ply 16 upward, forming the ridge 22. Because the plies are joined by the seams 18, 24 along the side edges of the ridge 22, the peripheral ridge is rounded.
Thus it will be seen that there is provided an infant's mat and method for making the same which achieves the various objects of the invention and which is well adapted to meet the conditions of practical use.
As various possible embodiments might be made of the present invention, and as various changes might be made in the embodiment and method above set forth, it is to be understood that all matter herein described or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.
Having thus described the present invention, there is claimed as new and desired to be secured by Letters Patent:
1. A feeding mat comprising: a soft base ply of resilient flexible foamed synthetic thermoplastic sheet material the undersurface of which has a liquid impervious skin and a rough antiskid surface, a coextensive top ply of a liquid impervious sheet of flexible synthetic unfoamed thermoplastic material, said plies having their common peripheral edges in registry, a marginal zone of said plies lying alongside the common peripheral edges, an elongate strip of foamed soft resilient flexible material, said strip being interposed between said plies and within said marginal zone, a first seam joining said plies along their common peripheral edges, a second seam joining the said plies, said second seam being spaced inwardly from the first seam, said marginal zone being interposed between said seams, said second seam peripherally enclosing an area of said top ply, the portion of said top ply within said area lying substantially within a plane, the portion of said top ply within said marginal zone being elevated from the plane of said area, the foamed base ply serving to resiliently support the top ply to prevent a child from injuring himself, the elongate strip serving to raise the portion of the top ply within the marginal zone, the portion of the top ply within said marginal zone preventing the outflow of spilled foods from the area of the top ply over the peripheral edges of the mat.
2. A mat as set forth in claim 1, wherein the strip is com- 3. A mat as set forth in claim 1, wherein a design is formed on the area of the top ply, said design including heat welded depressed portions between the top ply and the base ply.
4. A mat as set forth in claim 1, wherein the plies are mupressed by the two plies to round the elevated portion of the 5 many hem'sealed at the first and second seams" top ply.
Claims (3)
- 2. A mat as set forth in claim 1, wherein the strip is compressed by the two plies to round the elevated portion of the top ply.
- 3. A mat as set forth in claim 1, wherein a design is formed on the area of the top ply, said design including heat welded depressed portions between the top ply and the base ply.
- 4. A mat as set forth in claim 1, wherein the plies are mutually heat-sealed at the first and second seams.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US85752269A | 1969-09-12 | 1969-09-12 |
Publications (1)
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US3637454A true US3637454A (en) | 1972-01-25 |
Family
ID=25326179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US3637454D Expired - Lifetime US3637454A (en) | 1969-09-12 | 1969-09-12 | Feeding mat |
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US (1) | US3637454A (en) |
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US3862876A (en) * | 1973-04-02 | 1975-01-28 | James E Graves | Protective edge weighted cover cloth |
US3920870A (en) * | 1974-01-18 | 1975-11-18 | Percare Inc | Decorative placemat construction with a graphic pattern insert |
US3983277A (en) * | 1974-01-18 | 1976-09-28 | Percare, Inc. | Decorating placemat construction with a graphic pattern |
US4655502A (en) * | 1984-11-29 | 1987-04-07 | Houllis Cynthia A | Multi-adjustable cushion for a shopping cart |
US5386964A (en) * | 1993-01-27 | 1995-02-07 | Artistic Desk Pad & Novelty Co., Inc. | Desk pad comprising a fibrous backing and a substantially smooth facing |
US5896603A (en) * | 1997-12-18 | 1999-04-27 | Klear-Vu Corporation | Articles with gripping surfaces |
US6014935A (en) * | 1998-03-09 | 2000-01-18 | Willett; Timothy | All weather outdoor table cover |
US20030152736A1 (en) * | 2002-02-13 | 2003-08-14 | Edwin Bass | Plate mat |
US6746735B2 (en) | 2002-08-28 | 2004-06-08 | Kiddopotamus And Company | Placemat member |
US6767605B1 (en) * | 2002-12-04 | 2004-07-27 | Daniel J. Raciborski | Mousepad having wrist support |
US20040144683A1 (en) * | 2003-01-27 | 2004-07-29 | Tin-Chou Wang | Serving tray |
US20060051555A1 (en) * | 2004-09-03 | 2006-03-09 | Tshantz Jolene F | Weighted placemat |
US20100154943A1 (en) * | 2008-12-19 | 2010-06-24 | 3M Innovative Properties Company | Drop cloth |
USD665214S1 (en) * | 2011-06-22 | 2012-08-14 | Ex-Cell Home Fashions, Inc. | Placemat and napkin ring assembly |
US8740006B2 (en) | 2011-06-09 | 2014-06-03 | Matson Inc. | Portable drip containment device apparatus and method |
USD802853S1 (en) * | 2016-04-04 | 2017-11-14 | Macneil Ip Llc | Pet feeding system |
US9901197B2 (en) * | 2016-01-10 | 2018-02-27 | Mark Lucas | Memory foam blanket |
USD873504S1 (en) | 2016-04-04 | 2020-01-21 | Macneil Ip Llc | Compact mat for pet feeding system |
USD873503S1 (en) * | 2016-04-04 | 2020-01-21 | Macneil Ip Llc | Pet feeding system |
USD873502S1 (en) | 2016-04-04 | 2020-01-21 | Macneil Ip Llc | Double bowl low-profile pet feeding station |
USD880787S1 (en) * | 2019-08-19 | 2020-04-07 | David H. Price | Mat |
USD880788S1 (en) * | 2019-08-19 | 2020-04-07 | David H. Price | Mat |
USD884988S1 (en) * | 2019-12-19 | 2020-05-19 | Chuan Wu | Dog food mat |
USD894498S1 (en) | 2016-04-04 | 2020-08-25 | Macneil Ip Llc | Single-bowl pet water/food station |
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US3122265A (en) * | 1962-07-16 | 1964-02-25 | Elbert E Innis | Food server |
US3195847A (en) * | 1961-04-06 | 1965-07-20 | Elizabeth L Squires | Absorbable support |
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1969
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US2004166A (en) * | 1933-04-13 | 1935-06-11 | Stanley J Low | Coaster |
US2597460A (en) * | 1947-12-01 | 1952-05-20 | Joseph R Eberhardt | Serving and utility tray |
US2757478A (en) * | 1953-11-02 | 1956-08-07 | Alexander H Borland | Place mat |
US2777626A (en) * | 1954-01-28 | 1957-01-15 | Keyes Fibre Co | Tray with cork surface portions and method of making |
US2893163A (en) * | 1957-05-20 | 1959-07-07 | Ernest Hazel Jr Inc | Coaster |
US3195847A (en) * | 1961-04-06 | 1965-07-20 | Elizabeth L Squires | Absorbable support |
US3122265A (en) * | 1962-07-16 | 1964-02-25 | Elbert E Innis | Food server |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3862876A (en) * | 1973-04-02 | 1975-01-28 | James E Graves | Protective edge weighted cover cloth |
US3920870A (en) * | 1974-01-18 | 1975-11-18 | Percare Inc | Decorative placemat construction with a graphic pattern insert |
US3983277A (en) * | 1974-01-18 | 1976-09-28 | Percare, Inc. | Decorating placemat construction with a graphic pattern |
US4655502A (en) * | 1984-11-29 | 1987-04-07 | Houllis Cynthia A | Multi-adjustable cushion for a shopping cart |
US5386964A (en) * | 1993-01-27 | 1995-02-07 | Artistic Desk Pad & Novelty Co., Inc. | Desk pad comprising a fibrous backing and a substantially smooth facing |
US6212717B1 (en) | 1997-12-18 | 2001-04-10 | Klear-Vu Corporation | Articles with gripping surfaces |
US5896603A (en) * | 1997-12-18 | 1999-04-27 | Klear-Vu Corporation | Articles with gripping surfaces |
US6014935A (en) * | 1998-03-09 | 2000-01-18 | Willett; Timothy | All weather outdoor table cover |
US20030152736A1 (en) * | 2002-02-13 | 2003-08-14 | Edwin Bass | Plate mat |
US6746735B2 (en) | 2002-08-28 | 2004-06-08 | Kiddopotamus And Company | Placemat member |
US6767605B1 (en) * | 2002-12-04 | 2004-07-27 | Daniel J. Raciborski | Mousepad having wrist support |
US20040144683A1 (en) * | 2003-01-27 | 2004-07-29 | Tin-Chou Wang | Serving tray |
US6814235B2 (en) * | 2003-01-27 | 2004-11-09 | Hwan Yih Enterprise Co., Ltd. | Serving tray |
US20060051555A1 (en) * | 2004-09-03 | 2006-03-09 | Tshantz Jolene F | Weighted placemat |
US20100154943A1 (en) * | 2008-12-19 | 2010-06-24 | 3M Innovative Properties Company | Drop cloth |
US8740006B2 (en) | 2011-06-09 | 2014-06-03 | Matson Inc. | Portable drip containment device apparatus and method |
US8931658B2 (en) | 2011-06-09 | 2015-01-13 | Matson, Inc. | Portable drip containment device apparatus and method |
USD665214S1 (en) * | 2011-06-22 | 2012-08-14 | Ex-Cell Home Fashions, Inc. | Placemat and napkin ring assembly |
US9901197B2 (en) * | 2016-01-10 | 2018-02-27 | Mark Lucas | Memory foam blanket |
USD899709S1 (en) * | 2016-04-04 | 2020-10-20 | Macneil Ip Llc | Pet water station |
USD873504S1 (en) | 2016-04-04 | 2020-01-21 | Macneil Ip Llc | Compact mat for pet feeding system |
USD873503S1 (en) * | 2016-04-04 | 2020-01-21 | Macneil Ip Llc | Pet feeding system |
USD873502S1 (en) | 2016-04-04 | 2020-01-21 | Macneil Ip Llc | Double bowl low-profile pet feeding station |
USD882882S1 (en) | 2016-04-04 | 2020-04-28 | Macneil Ip Llc | Pet feeding system |
USD894498S1 (en) | 2016-04-04 | 2020-08-25 | Macneil Ip Llc | Single-bowl pet water/food station |
USD802853S1 (en) * | 2016-04-04 | 2017-11-14 | Macneil Ip Llc | Pet feeding system |
USD899707S1 (en) | 2016-04-04 | 2020-10-20 | Macneil Ip Llc | Single-bowl pet water/food station |
USD901095S1 (en) | 2016-04-04 | 2020-11-03 | Macneil Ip Llc | Single-bowl pet water/food station |
USD901096S1 (en) * | 2016-04-04 | 2020-11-03 | Macneil Ip Llc | Pet water station |
USD880787S1 (en) * | 2019-08-19 | 2020-04-07 | David H. Price | Mat |
USD880788S1 (en) * | 2019-08-19 | 2020-04-07 | David H. Price | Mat |
USD884988S1 (en) * | 2019-12-19 | 2020-05-19 | Chuan Wu | Dog food mat |
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