US2406455A - Vulcanizing unit - Google Patents

Vulcanizing unit Download PDF

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Publication number
US2406455A
US2406455A US576266A US57626645A US2406455A US 2406455 A US2406455 A US 2406455A US 576266 A US576266 A US 576266A US 57626645 A US57626645 A US 57626645A US 2406455 A US2406455 A US 2406455A
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Prior art keywords
vulcanizing unit
grooves
cables
vulcanizing
water jacket
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US576266A
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Cyril D Davidson
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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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/041—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using liquids
    • 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
    • B29C65/02—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
    • B29C65/26—Hot fluid
    • 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
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7375—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 state of the material of the parts to be joined uncured, partially cured or fully cured
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91431—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being kept constant over time
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B29C66/8432—Machines for making separate joints at the same time mounted in parallel or in series
    • 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
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • 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
    • B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
    • B29K2305/08—Transition metals
    • B29K2305/10—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/707—Cables, i.e. two or more filaments combined together, e.g. ropes, cords, strings, yarns
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/802—Cable tube or rod splicing

Definitions

  • This invention relates to a vulcanizing unit, and more particularly to such a device adapted for curing splices in cables, as for example in mining cables.
  • a primary object of this invention is the provision of an improved vulcanizing unit provided with extra curing capacity, which enables a plurality of cables to be vulcanized simultaneously, in such manner as to save rubber, copper and man hours, normally occasioned by defective splices in less effective molds.
  • An additional object of the invention is the provision of an improved device, which may be readily carried or removed from spot to spot as required.
  • a still further object of the invention is the provision of such a device characterized by a plurality of removable molds, whereby a plurality of sizes of cables may be readily vulcanized simultaneously, if desired.
  • a still further object of the invention resides in the provision of such a device which will be sturdy and durable in construction, reliable and efiicient in operation, and relatively simple and inexpensive to manufacture, and operate.
  • Figure 1 is a side elevational view of one form of vulcanizing unit constructed in accordance with this inventive concept.
  • Figure 2 is a top plan view of the device disclosed in Figure 1, certain parts thereof being omitted for the sake of clarity.
  • Figure3 is a perspective view of one of the molds adapted to be utilized in the device.
  • Figure 4 is an end elevational view of the device shown in Figure 1, as viewed from the left.
  • Figure 5 is an end elevational view similar to Figure 4, but disclosing the device in Figure 1 as viewed from the right.
  • Figure 6 is a sectional View taken substantially along the line 6-6 of Figure 2.
  • Figure '7 is a perspective view of a constructional detail.
  • the device of the instant invention comprises a casing I0, double-walled and adapted to be filled with fluid, as at H, (see Fig. 6) and provided with a plurality, illustratively three, transversely extending recesses or depressions [2, adapted to contain upper and lower mold blocks 13 and 14, each provided with a plurality of longitudinally extending, cable-containing grooves 15- and. I6, respectively (see Figs. 1 and 3).
  • each of the channels I2 is provided with oppositely disposed, longitudinally extending grooves H, in which are adapted to be slidably positioned blocks l8, each provided with a plurality of threaded apertures [9, in which are adapted to be positioned bolts or screws 20.
  • the bolts 20 are of a sufficient length that, when tightened down, they may abut and firmly compress the upper surface of the upper mold block M, for the purpose of compressing the cables contained within the transverse grooves 15 and I6.
  • Water is adapted to be fed into the receptacle l0 through an inlet 25, which may alsocomprise a plug for determining the quantity of water in the water jacket, and an air release valve 26 is correspondingly provided.
  • the water jacket is provided with a safety valve 21 of conventional type, provided with a nipple 28 to which may be attached a tube of any desired type to pipe off excess steam, or the like, and a pressure gauge 29 to indicate the pressure within the device,
  • the opposite end of the device is provided with a thermostatic heat control 3
  • the operation of the device should now be readily understandable.
  • the cables are first spliced, and the insulation applied therearound, whereupon they are placed between the mold blocks l3 and M in the grooves l5 and I6, positioned within the channel I2.
  • the screws 20 are then tightened downwardly until the molds are firmly closed, and the device is.
  • a receptacle forming a water jacket safety valve on said water jacket.

Description

Aug. 27, 1946: c. D. "DAVIDSON 2,406,455
VULCANIZING UNIT Filed Feb. 5, 1945 '2 Sheets-Sheet 1 ,I| ll I H w 1 I I- 6 wooll oo l ool 6 1 1 I i' oonooa' ooi. |20 20 .1 l
f7/igo |l ol!oo l "a 11/1 L18 9mm pay/am.
Aug 27,1946. 3, D, so v 2,406,455
I VULGANIZING UNIT Filed Feb. 5, 1945 2 Sheets-Shee 2 Inventor 'g/rf/D. pair/330a.
andflmayfim v v Patented Aug. 27, 1946 UNITED STATES- PATENT OFFICE VULCANIZING UNIT Cyril D. Davidson, Washington, Pa. Application February 5, 1945, Serial No. 576,266
1 Claim. 1
This invention relates to a vulcanizing unit, and more particularly to such a device adapted for curing splices in cables, as for example in mining cables.
A primary object of this invention is the provision of an improved vulcanizing unit provided with extra curing capacity, which enables a plurality of cables to be vulcanized simultaneously, in such manner as to save rubber, copper and man hours, normally occasioned by defective splices in less effective molds.
An additional object of the invention is the provision of an improved device, which may be readily carried or removed from spot to spot as required.
A still further object of the invention is the provision of such a device characterized by a plurality of removable molds, whereby a plurality of sizes of cables may be readily vulcanized simultaneously, if desired.
A still further object of the invention resides in the provision of such a device which will be sturdy and durable in construction, reliable and efiicient in operation, and relatively simple and inexpensive to manufacture, and operate.
Other objects reside in the combinations of elements, arrangements of parts, and features of construction, all as will be more fully pointed out hereinafter and disclosed in the accompanying drawings, wherein there is shown a preferred embodiment of this inventive concept.
In the drawings:
Figure 1 is a side elevational view of one form of vulcanizing unit constructed in accordance with this inventive concept.
Figure 2 is a top plan view of the device disclosed in Figure 1, certain parts thereof being omitted for the sake of clarity.
Figure3 is a perspective view of one of the molds adapted to be utilized in the device.
Figure 4 is an end elevational view of the device shown in Figure 1, as viewed from the left.
Figure 5 is an end elevational view similar to Figure 4, but disclosing the device in Figure 1 as viewed from the right.
Figure 6 is a sectional View taken substantially along the line 6-6 of Figure 2.
Figure '7 is a perspective view of a constructional detail.
Similar reference characters refer to similar parts throughout the several views of the drawings.
Having reference now to the drawings, the device of the instant invention comprises a casing I0, double-walled and adapted to be filled with fluid, as at H, (see Fig. 6) and provided with a plurality, illustratively three, transversely extending recesses or depressions [2, adapted to contain upper and lower mold blocks 13 and 14, each provided with a plurality of longitudinally extending, cable-containing grooves 15- and. I6, respectively (see Figs. 1 and 3). The upper portion of each of the channels I2 is provided with oppositely disposed, longitudinally extending grooves H, in which are adapted to be slidably positioned blocks l8, each provided with a plurality of threaded apertures [9, in which are adapted to be positioned bolts or screws 20. The bolts 20 are of a sufficient length that, when tightened down, they may abut and firmly compress the upper surface of the upper mold block M, for the purpose of compressing the cables contained within the transverse grooves 15 and I6.
Water is adapted to be fed into the receptacle l0 through an inlet 25, which may alsocomprise a plug for determining the quantity of water in the water jacket, and an air release valve 26 is correspondingly provided.
As best shown in Figure 5, the water jacket is provided with a safety valve 21 of conventional type, provided with a nipple 28 to which may be attached a tube of any desired type to pipe off excess steam, or the like, and a pressure gauge 29 to indicate the pressure within the device,
As best shown in Figure 4, the opposite end of the device is provided with a thermostatic heat control 3|] of any desired conventional type in association with an electric automatic switch, likewise of known type, adapted to control an electric heating element 32, adapted to provide heat for the heating of the water H within the water jacket.
From the foregoing, the operation of the device should now be readily understandable. When it is desired to vulcanize a mine cable, or the like, or a plurality of the same, the cables are first spliced, and the insulation applied therearound, whereupon they are placed between the mold blocks l3 and M in the grooves l5 and I6, positioned within the channel I2. The screws 20 are then tightened downwardly until the molds are firmly closed, and the device is.
heated until a desired temperature is achieved. This temperature is maintained until the cable is suitably vulcanized, whereupon the device may be cut off and the completely vulcanized cable removed therefrom.
While in the foregoing the device has been de scribed and shown as adapted for electric heating, it will be readily understood that the same may be heated by gas or the like, or in any other suitable manner.
From the foregoing, it will now be seen that there is herein provided an improved device accomplishing all the objects of this invention and others including many advantages of great practical utility and commercial importance.
As many embodiments may be made of this inventive concept, and as many modifications may, be made in the embodiment hereinbefore shown and described, it is tobe understood that all matter herein is to be interpreted merelye as illustrative and not in a limiting sense.
I claim:
4 having transverse channels of substantially rectangular cross section therein, separable upper and lower mold blocks positionable slidably in said channels, means forming a plurality of aligned grooves in each of said mold blocks, the grooves in each upper and lower mold block coacti-ng to form a plurality of cylindrical, bores adapted to receive a plurality of strands of a cable for simultaneous vulcanizing means forming grooves in the side walls of said channels, apertured plates slidable in said grooves, screws "extending through said apertures in said plates,
flmovable to compress said upper mold blocks against said lower mold blocks, means for heating the water in said water jacket, thermostatic .7 means for controlling said heating means, and a In a device of the character described, in com-e f bination, a receptacle forming a water jacket safety valve on said water jacket.
CYRIL D. DAVIDSON.
US576266A 1945-02-05 1945-02-05 Vulcanizing unit Expired - Lifetime US2406455A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540432A (en) * 1946-03-15 1951-02-06 Clarence A Evans Educational plastic set
FR2547529A1 (en) * 1983-05-25 1984-12-21 Hutchinson Sa Portable press for the hot welding (fusion-bonding) of, in particular, seals, by vulcanisation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540432A (en) * 1946-03-15 1951-02-06 Clarence A Evans Educational plastic set
FR2547529A1 (en) * 1983-05-25 1984-12-21 Hutchinson Sa Portable press for the hot welding (fusion-bonding) of, in particular, seals, by vulcanisation

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