US2168993A - Expanding device for tubular envelopes - Google Patents

Expanding device for tubular envelopes Download PDF

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Publication number
US2168993A
US2168993A US142655A US14265537A US2168993A US 2168993 A US2168993 A US 2168993A US 142655 A US142655 A US 142655A US 14265537 A US14265537 A US 14265537A US 2168993 A US2168993 A US 2168993A
Authority
US
United States
Prior art keywords
tube
mandrel
celluloid
envelope
expanding device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US142655A
Other languages
English (en)
Inventor
Joseph Alex
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2168993A publication Critical patent/US2168993A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B29B13/024—Hollow bodies, e.g. tubes or profiles
    • 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
    • B29C35/06—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam for articles of indefinite length
    • 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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/22—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
    • B29C55/24—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes radial
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/08—Making preforms having internal stresses, e.g. plastic memory by stretching tubes
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/38—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor by liberation of internal stresses
    • B29C63/42—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor by liberation of internal stresses using tubular layers or sheathings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/16—Making non-propelling pencils
    • 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
    • B29C35/16—Cooling
    • B29C2035/1616—Cooling 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
    • 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
    • B29C35/049—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using steam or damp

Definitions

  • My invention relates to the manufacture of envelopes designed to protect rod-shaped articles such as for instance slate-pencils, leads, color pencils, etc., against breakage. It has particular reference to tubular envelopes made of some flexible material such as for instance Celluloid, which can be easily cut through when pointing the pencil or the like.
  • the inner diameter of the envelope must be slightly larger than the outer diameter of the article.
  • Celluloid tubes have already been expanded by treating them with hot water, whereupon the pencil or the like has been introduced into the envelope, and this latter shrunk onto the pencil by quenching it with cold water.
  • the tubes heated to a suitable temperature, are slowly drawn over a mandrel of increasing diameter, whereby the tubes are imparted an inner diameter slightly exceeding the outer diameter of the pencil or the like.
  • the expansion of the tube is rendered permanent by cooling.
  • a length of tube equalling that of the article to be covered is then cut off and the article introduced, whereupon the tube is heated together with the article, for instance in boiling Water, whereupon the Celluloid tube will shrink and firmly embrace the pencil or the like,
  • I is a mandrel of a diameter such as to exactly fit in the Celluloid or other tube before it is expanded.
  • 2 is a conical shoulder formed on the mandrel, the diameter of which increases from this point on to considerably exceed the part I.
  • 3 is a steam box with an inlet 5' and outlet 5 and with central apertures 6 formed in opposite walls, while I are paclc'ngs, for instance rubber packings serving to prevent the escape or" steam.
  • the mandrel l extends through the apertures 6 with the conical shoulder 2 surrounded by the steam box, the clearance between the mandrel and the packings being so chosen, that a Celluloid tube can pass through.
  • the box 8 is a cooling box surrounding the expanded part of the tube and adjoining the steam box.
  • the box 8 is fitted with an intake and exhaust for cold water and with packings similar as the steam box 3.
  • Expanding device for tubular envelopes consisting of a cellulose compound such as Celluloid, comprising in combination, a mandrel in two sections differing in diameter with a conical shoulder connecting the two sections, a heating chamber surrounding the conical shoulder of the mandrel, a cooling chamber surrounding a portion of the larger section of the mandrel and means for drawingthe envelope to be expanded axially over the mandrel and through said chambers.
  • a mandrel in two sections differing in diameter with a conical shoulder connecting the two sections, a heating chamber surrounding the conical shoulder of the mandrel, a cooling chamber surrounding a portion of the larger section of the mandrel and means for drawingthe envelope to be expanded axially over the mandrel and through said chambers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
US142655A 1936-05-14 1937-05-14 Expanding device for tubular envelopes Expired - Lifetime US2168993A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2168993X 1936-05-14

Publications (1)

Publication Number Publication Date
US2168993A true US2168993A (en) 1939-08-08

Family

ID=19873786

Family Applications (1)

Application Number Title Priority Date Filing Date
US142655A Expired - Lifetime US2168993A (en) 1936-05-14 1937-05-14 Expanding device for tubular envelopes

Country Status (2)

Country Link
US (1) US2168993A (de)
CH (1) CH200699A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423260A (en) * 1944-12-29 1947-07-01 Extruded Plasties Inc Extrusion of tubing
US2494273A (en) * 1947-01-29 1950-01-10 Goodrich Co B F Apparatus for expanding thermoplastic tubing
US2602959A (en) * 1948-03-05 1952-07-15 John M Fenlin Apparatus for making tubular conduits
US2945258A (en) * 1958-04-22 1960-07-19 Koppers Co Inc Apparatus for producing plastic material
EP0325923A3 (de) * 1988-01-19 1990-03-14 Caran D'ache S.A. Verfahren zum Umhüllen von Bleistiften und ein nach diesem Verfahren hergestellter Bleistift
US12144946B1 (en) 2020-03-10 2024-11-19 Bard Peripheral Vascular, Inc. Apparatus for forming balloon layer and related methods

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611154A (en) * 1948-09-17 1952-09-23 Chevrier Eugene Marcel Method of pressing blanks of molded pulp
CN112847906B (zh) * 2021-01-25 2023-03-14 宜宾天亿新材料科技有限公司 一种用于pvc-o管件制备前的管材多段式加热装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423260A (en) * 1944-12-29 1947-07-01 Extruded Plasties Inc Extrusion of tubing
US2494273A (en) * 1947-01-29 1950-01-10 Goodrich Co B F Apparatus for expanding thermoplastic tubing
US2602959A (en) * 1948-03-05 1952-07-15 John M Fenlin Apparatus for making tubular conduits
US2945258A (en) * 1958-04-22 1960-07-19 Koppers Co Inc Apparatus for producing plastic material
EP0325923A3 (de) * 1988-01-19 1990-03-14 Caran D'ache S.A. Verfahren zum Umhüllen von Bleistiften und ein nach diesem Verfahren hergestellter Bleistift
US12144946B1 (en) 2020-03-10 2024-11-19 Bard Peripheral Vascular, Inc. Apparatus for forming balloon layer and related methods

Also Published As

Publication number Publication date
CH200699A (de) 1938-10-31

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