US2579063A - Heated pressure seaming device for plastics - Google Patents

Heated pressure seaming device for plastics Download PDF

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US2579063A
US2579063A US31454A US3145448A US2579063A US 2579063 A US2579063 A US 2579063A US 31454 A US31454 A US 31454A US 3145448 A US3145448 A US 3145448A US 2579063 A US2579063 A US 2579063A
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roller
pressure
thread
plastic
sheets
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Alvadore M Andrews
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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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5035—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being in thread form, i.e. in the form of a single filament, e.g. in the form of a single coated filament
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5092—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the tape handling mechanisms, e.g. using vacuum
    • 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
    • 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
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/324—Avoiding burr formation
    • 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
    • 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
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81265—Surface properties, e.g. surface roughness or rugosity
    • 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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts
    • B29C66/83433—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts the contact angle between said rollers, cylinders or drums and said bands or belts being a non-zero angle
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4895—Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29K2909/00—Use of inorganic materials not provided for in groups B29K2803/00 - B29K2807/00, as mould material
    • B29K2909/08—Glass

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Dec 18, 1951 A. M. ANDREWS 2,579,063
HEATED PRESSURE SEAMING DEVICE FOR PLASTICS Filed June '7, 1948 SILVERED SURFACE INVENTOR. ALVADORE M. ANDREWS ATTORNEY Patented Dec. 18, 1951 HEATED museum: s PLAS EAMING DEVICE FOR TICS v I Alvadorc M. Andremlortland, Oreg. v Application June 7,1948, Serial No. 31,454
2Claims. (Cl. 154 42) I This invention relates to improvements in construction of the apparatus for joining a plurality of sheets of flexible material, by introducing a thread-like carrier between the sheets to be joined, the said carrier having been drawn through a reservoir of the cement used and given a correct burden of cement for the joinder to made under heat and pressure.
It is similar to but improved over the parent application infra; the heat and the prolonged pressure being operational differences over the machine shown and claimed in my cpending application Ser. No. 747,960, filed May 14, 1947, for Apparatus and Method of Joining Pieces of Plastic, now Patent No. 2,500,053, of which this application is a continuation in part.
The objects of the invention are to increase speed of production by increasing the period of forcible contact under pressure to get as good adhesion as that which can be had by the machine oi the earlier application and at a much greater speed.
Since the solvents suitable for use in the method and apparatus are of highly volatile character and must be protected from atmosphere contact by passing the saturated thread through a tube right up to the point of inserting said thread between parts to be seamed by cementation, the additional speed makes it possible to use a smaller thread where the same is fibrous absorbent material or a smaller thread when the thread is a filament of plastic material responsive to the same solvent that seams the pieces of plastic sheet together, as the speed lessens the time during which the solvents can attack the plastic filament and reduce its tensile strength below that requisite to get it and its burden of solvent into place between the sheets to be joined or seamed. The two expressions joined or seamed, are used herein indiscriminately.
A drawing accompanies and forms a part of this specification in which- Fig. 1 is a side view, partially in section, of the seaming devices in preferred juxtaposition and operable relationship, to be explained;
Fig. 2 is an elevation of the structure of Fig. 1 taken on the plane 2-2, Fig. 1;
Fig. 3 is an enlarged view of the section of Pig. 1 taken on the plane 33, Fig. 1;
Fig. 4 is a fragmentary view of the pressure roller, showing the application of a heating element, to be explained;
Fig. 5 is a side view or the upper pressure element or roller," taken at reduced scale on the 2 I plane 5-5, Fig. 3, and broken away to show a.
.sidc view oi the heating element; and
Fig. 6 is a. partially sectioned view of the lower pressure wheel that cooperates with, the heated upper roller previously referred to, the view .being taken on the plane 6-6. Fig. 3, at reduced scale.
Describing the figures and the details thereof with greater particularity. A pressureroller I and a pressure wheel 2 are driven at synchronous speed by bevel gear sets 3 and 4 by the vertical shaft 5 and the lay-shaft 6, respectively. The pressure roller is supported by a presser foot I, movably carried by a head 8, and the pressure wheel 2 is revolubly mounted on a base-plate l0; both the head 8 and the base-plate I 0 being a part of the machine structure, the broken away parts of which are not shown but which may be ascertained, if desirable, from the parent application, the relationship being unmistakable.
A tube ll, contains a thread l2, which may either be fibrous absorbent material such as cotton or may be a filament of plastic, usually identical with that of the sheets to be joined, such as flexible vinylite plastic. The thread i2 is supplied from a ball or spool and the end first passed through a reservoir containing solvent that responsively attacks the plastic sheets to be joined and the filament of plastic if one is used for the thread i2. In case a fibrous thread is used for 12, dependence will be upon its soaking up a small quantity of the solvent, which is rapidly pulled through the tube H by feeding the thread between sheets of plastic such as !3 and M which are concurrently drawn lactween the pressure roller l and the pressure wheel 2, by operation of said roller and said wheel by operation of the bevel gear sets 3 and 4; power being applied through the vertical shaft 5, and the lay-shaft 6, from a source not shown.
When the thread i 2 is thus drawn in between the sheets of plastic l3 and H, pressure applied by the roller 1 and the wheel2, expresses solvent absorbed by the fabric thread I2 or carried in a partially dissolved outer surface, if I2 is a filament of plastic, and brings all three elements of the seam into firm contact. The roller I has a heating means to be described, which greatly assists in the making an adequate seam and the sheets pass, still held in contact, over the idle roller I 5, being supported in arcuate contact with the heated roller I by the belt It for nearly a quadrant of the surface of the roller I, as shown at I! in Fig. 1.
The pressure wheel '2, is provided with a belt traction surface supplied by a disc of resilient a recess 2?, formed by two hair-round grooves formed in the glass elements 22 and 29. Current for heating is supplied by the circuit 23, with which in series is the variable resistance 20 which, by leads 39 and 3! and the commutator rings 32 and 33, receives current irom the circuit 28 by the brushes 34 and 35.
The pressure wheel 2, preferably has a pressure ridge 88 of sumcient height and width to apply pressure of desired amount to the soaked thread I2 through the sheets, expressing its cement between the sheets. The resiliently supported belt It bears against the roller i tight enough to limit the spread of cementitious ma= terial on that side and define a straight seam.
The side parts of the roller i are preferably made of a strong synthetic of the Bakelite type and the parts held together by suitable fastenings such as the screws 38 and 39. The outside surfaces of the glass parts 22 and 23, as indicated by legend, are silvered to improve their heat directional properties and send the most of the heat towards the perimeter of the roller I, of which they form a part.
This construction permits a relatively long application of heat to the two plastic parts to be seamed, while holding them in firm contact, thus satisfying the stated objects of the invention in an excellent manner. The employment of the belt l6, holds the sheets such as l3 and H in a firm supporting grip, preventing side slip of the sheets, while their contacting surfaces are slippery with solvent, before the heat has had an opportunity to effect the firm joinder.
Having fully disclosed my invention so that those familiar with the art to which it appertains can make and use it, what I claim as new and desire to secure by Letters Patent, is:
A heated pressure searnhig device of the sol-- vent carrying thread t me wherewith two pieces of plastic are subjected to heat and premure with a solvent carrying thread between the said pieces, characterized by an upper driven revoluble pressure roller, an electrical heating ele ment embedded therein in substantial concen tricity with and of less diameter than the perimeter of the roller, and a pressure wheel supported for power drive immediately beneath said roller, the said roller having a slightly roughened surface and the wheel having a.- mating raised surface to determine the width oi the zone to which pressure is applied.
2. In an apparatus of the class described, the combination comprising a pair oi cooperating roller elements mounted for rotation about paral lel axes, means biasing the peripheries of said roller elements together, means for driving said roller elements at the same speed, said roller elements being adaptd to receive therebetween a pair of plastic sheets to be bonded together, the peripheral portion of one of said roller elements being formed of glass and having an electric. heating element imbedded therein, the inner surface of said glass portion being provided with a coating of reflective material.
ALVADORE M. ANDREWS.
REFERENCE GiElElID The following references are of record in the file of this patent:
UNITED STATES PATENTS
US31454A 1948-06-07 1948-06-07 Heated pressure seaming device for plastics Expired - Lifetime US2579063A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724531A (en) * 1952-06-21 1955-11-22 American Metal Specialties Cor Ruffle forming method and apparatus
US2725089A (en) * 1952-11-25 1955-11-29 Gen Motors Corp Applicator tool
US2732887A (en) * 1956-01-31 Heat-sealing of thermoplastic
US2738828A (en) * 1953-10-10 1956-03-20 Hammer Steffen Method and arrangement to carry out welding operations on plastic film webs
US2743761A (en) * 1953-10-20 1956-05-01 Goodyear Tire & Rubber Heat sealer
US2767769A (en) * 1953-10-20 1956-10-23 Goodrich Co B F Heat-sealing thermoplastics
US2987107A (en) * 1959-02-27 1961-06-06 Amsco Packaging Machinery Inc Rotary heat-sealing apparatus
US4213031A (en) * 1976-10-21 1980-07-15 Bosch-Siemens Hausgerate Gmbh Heat sealing roller having a temperature self-controlled PTC heating resistor for welding thermoplastic foils
EP1366890A1 (en) * 2002-05-16 2003-12-03 Leister Process Technologies Proces and apparatus for joining of synthetic materials at high welding speed
WO2006087224A1 (en) * 2005-02-18 2006-08-24 Jentschmann Ag Zürich Ultrasonic welding device for forming welded seams on textiles
US10232557B2 (en) * 2016-01-27 2019-03-19 Huizhou Willing Office Supplies Co., Ltd. Heating apparatus for air cushion machine

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US1691493A (en) * 1927-12-30 1928-11-13 Bqston Machine Works Company Seam-pressing machine
US2117452A (en) * 1932-09-08 1938-05-17 Us Rubber Co Cut seaming machine
US1954061A (en) * 1932-10-19 1934-04-10 Duplate Corp Device for grooving safety glass
US2241067A (en) * 1939-09-09 1941-05-06 Gen Electric Sadiron
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US2364903A (en) * 1941-08-16 1944-12-12 Pneumatic Scale Corp Bag for infusing material
US2335159A (en) * 1941-09-30 1943-11-23 Ivers Lee Co Adhesively sealed package
US2384462A (en) * 1942-02-12 1945-09-11 Marcleph & Co Inc Reinforced artificial casing for food products
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US2732887A (en) * 1956-01-31 Heat-sealing of thermoplastic
US2724531A (en) * 1952-06-21 1955-11-22 American Metal Specialties Cor Ruffle forming method and apparatus
US2725089A (en) * 1952-11-25 1955-11-29 Gen Motors Corp Applicator tool
US2738828A (en) * 1953-10-10 1956-03-20 Hammer Steffen Method and arrangement to carry out welding operations on plastic film webs
US2743761A (en) * 1953-10-20 1956-05-01 Goodyear Tire & Rubber Heat sealer
US2767769A (en) * 1953-10-20 1956-10-23 Goodrich Co B F Heat-sealing thermoplastics
US2987107A (en) * 1959-02-27 1961-06-06 Amsco Packaging Machinery Inc Rotary heat-sealing apparatus
US4213031A (en) * 1976-10-21 1980-07-15 Bosch-Siemens Hausgerate Gmbh Heat sealing roller having a temperature self-controlled PTC heating resistor for welding thermoplastic foils
EP1366890A1 (en) * 2002-05-16 2003-12-03 Leister Process Technologies Proces and apparatus for joining of synthetic materials at high welding speed
WO2006087224A1 (en) * 2005-02-18 2006-08-24 Jentschmann Ag Zürich Ultrasonic welding device for forming welded seams on textiles
US10232557B2 (en) * 2016-01-27 2019-03-19 Huizhou Willing Office Supplies Co., Ltd. Heating apparatus for air cushion machine

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