US3815639A - Corrugated tubing - Google Patents

Corrugated tubing Download PDF

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Publication number
US3815639A
US3815639A US00259383A US25938372A US3815639A US 3815639 A US3815639 A US 3815639A US 00259383 A US00259383 A US 00259383A US 25938372 A US25938372 A US 25938372A US 3815639 A US3815639 A US 3815639A
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United States
Prior art keywords
strip
margin
tube
strips
corrugations
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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
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US00259383A
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English (en)
Inventor
L Westerbarkey
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.)
Westaflex Werk L und F Westerbarkey and Co GmbH
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Westaflex Werk L und F Westerbarkey and Co GmbH
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/16—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics wound from profiled strips or bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/121—Making tubes or metal hoses with helically arranged seams with seams being neither welded nor soldered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/12—Making tubes or metal hoses with helically arranged seams
    • B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes

Definitions

  • a leading margin of an outer strip overlaps a lagging margin thereof along a corrugation. That corrugation is pressed along with a mating corrugation of the inner strip to form a headshaped or snap-button-shaped fold whereby the inner and outer strips are united.
  • a helically grooved, flexible two-layer tubing of strips of sheetmetal or plastic is characterized by the fact that the edges of the strip forming the inner layer are folded together and the edges, lying spaced between each two folds, of the strip forming the outer layer are developed, together with the underlying rib of the inner layer, into a head-like or snap-fastener-like fold.
  • An apparatus for manufacturing such tubing is characterized by the fact that three folding rollers are arranged around a winding mandrel behind the feed for a preshaped sheetmetal strip in the path of said strip at approximately equal distances apart, the first of said rollers pressing the rib formed by the overlapping edges to the side, the second pressing the laterally pressed rib more strongly against the winding mandrel, and the third being furthermore provided a second feed for a preformed sheet-metal strip which, covering the fold of the first strip, is wound on same, and folding rollers acting from the inside and outside which compress the rib on which the edges of the second strip overlap towards the outside, with the formation of a head-shaped or snap-button-shaped fold.
  • One method of producing helically grooved flexible tubes from sheetmetal strips preformed with grooves is characterized in accordance with the invention by the fact that first of all a sheet-metal strip is wound with overlapping edges on a winding mandrel and the edges are connected with each other by one or more shaping rollers forming a fold, and thereupon a second strip having the same preshaping is wound over the tube on the winding mandrel, its edges coming to lie approximately in the middle between the folds of the tube which is already wound and thereupon between shaping rollers acting from the inside and outside the rib is compressed on the overlap of the edges of the second strip to form a head-shaped or snap-button-shaped fold.
  • FIG. lb is a view of this device seen in the direction of the axis of the winding core.
  • FIG. 2 is a diagrammatic view of a wound tube.
  • FIG. 3 is a partial section through the winding of the first layer.
  • FIG. 4 is a partial section through the first folding of the first layer.
  • FIG. 5 is a partial section through the second folding of the first layer.
  • FIG. 6 is a partial section through the final folding of the first layer.
  • FIG. 7 is a partial section through the first and second layers.
  • FIG. 8 is a partial section through the folding of the first and second layers.
  • FIG. 9 is a partial section through the finished tube.
  • the winding device of FIGS. la and lb consists of a winding mandrel 1 which is driven in rotation in the direction indicated by the arrow A.
  • a first folding roller 2 On this winding mandrel 1 there is arranged a first folding roller 2 which is rotated in synchronism in the direction indicated by the arrow B.
  • the feed (not shown in detail here) for a strip 3 which as been preshaped with grooves.
  • a second folding roller 4 In the direction of the winding pitch and-spaced about from the first folding roller 2 there is arranged on the winding mandrel a second folding roller 4 which is also driven in the direction indicated by the arrow C.
  • Another folding roller 5 is arranged on the winding man drel 120 away from the second folding roller 4 in the direction of the winding pitch, it also being driven in the direction indicated by the arrow D.
  • two folding rollers namely an inner folding roller 6 and an outer folding roller 7, in such a manner that the point of contact of their cylindrical surfaces lies in the extension of the cylindrical surface of the winding mandrel.
  • the outer folding roller 7 is driven.
  • a feed (not shown here) for the strip which has been preshaped with grooves for the second layer of the tube.
  • FIG. 2 In orderto give an idea of a helically grooved flexible tube, reference is had to FIG. 2.
  • FIG. 3 there is shown a cross section through the wall of the first layer, helically wound on the winding mandrel l of the strip which has been preshaped with grooves.
  • This cross section lies at a point of the winding mandrel in front of the first folding roller 2 but behind the feed of the strip 3 for the first layer.
  • the edges of the helically wound strip overlap in such a manner that the flank of the groove which extends upward on one edge is covered by the flank of the groove which extends downward on the following edge of the strip. This place of overlap is widened, as shown in FIG.
  • the folding roller 2 is provided on its cylindrical surface with a shaping portion, protruding ribs 9 and 10 of which engage into adjacent grooves on both sides of the point of overlap of the strip wound into a tubing and between the ribs 9 and 10 it is developed with an asymmetric groove 11 which places the covered overlap rib with the two edges of the strip somewhat to the side and compresses it.
  • the groove 11 is made somewhat shallower than the general depth of the grooves of the strip.
  • This preformed fold is further compressed, as shown in FIG. 5, by a second folding roller 4.
  • this folding roller.4 is provided on its cylindrical surface with two ribs 12 and 13 which are the same distance apart and have the same height as the ribs 9 and 10 of the folding roller 2.
  • the groove 14 between these two ribs 12 and 13 is, however, substantially flatter and less curvedso that the overlap rib which has already been bent to one side is compressed further in the direction of the deflection.
  • the distance between and the height of the ribs 15 and 16 developed on the cylindrical surface is the same as in the preceding folding rollers 2 and 4.
  • the space between these two ribs 15 and 16 is developed as merely a slightly curved recess so that the fold of the overlap point of the strip edges which has been preformed in the two preceding folding rollers istightly and securely compressed.
  • the first layer of the strip wound on the winding mandrel 1 has been developed, upon passing the third folding roller 5, into a finished, firmly folded, one-layer tube.
  • the tube leaves the winding core and passes by two additional folding rollers 6 and 7.
  • the points of contact of the cylindrical surfaces of these two folding rollers lie in the extension of the cylindrical surface of the winding mandrel.
  • the inner folding roller 6 is rotatably supported and is provided on its cylindrical surface with a recess which corresponds approximately to the recess of the cylindrical surface of the first folding roller 2.
  • two ribs 17 and 18 are so arranged that they engage from the inside into the ribs which are adjacent the overlap groove of the edges of the outer strip.
  • this inner folding roller 6 Opposite this inner folding roller 6 and partially extending into its cylindrical surface is an outer folding roller 7 which is driven, in the same way as the folding rollers 2, 4 and 5.
  • the cylindrical surface of this outer folding roller 7 is provided with two outer ribs 20 and 21 which extend into the grooves of the tube which are adjacent the overlap groove. Between them is a considerably lower rib 22 which engages into the overlap groove. From FIG. 8 it can be noted that the two-layer tube is guided by the ribs 17 and 18 of the inner folding roller 6 and the ribs 20 and 21 of the outer folding roller 7.
  • the inner and outer layer of the two layer tube are connected by folds which are independent .of each other and located spaced from each other and furthermore a firm connection of the two layers is obtained by the head-shape or snap-button shape of the fold of the second outer layer.
  • the width of the strips used in practice for an advantageous embodiment is 10.5 ribs or I grooves, the dimension of the strip depending on the shape of the grooves. It is,.of course, also possible to use strips having a larger or fewer number of grooves. From FIG.
  • a two-layer tube in ac cordance with the invention must be formed from at least strips having 4 /2 grooves. Such a tube, however, has less flexibility since the folds closely follow each other on the inside and outside.
  • a cross section through the wall of the preferred embodiment of a tube in accordance with the invention is shown in FIG. 9.
  • a tube comprisingin combination: an elongated inner strip having an inner leading margin and an inner lagging margin each substantially parallel to the other, the inner strip having inner corrugations running substantially parallel to the inner margins,
  • the inner strip wound along a helical path with the inner leading margin and the inner lagging margin folded over each other along the helical path, an elongated outer strip having an outer leading margin and an outer'lagging margin each substantially parallel to the other, the outer strip having outer corrugations running substantially parallel to the outer margins,
  • the head-shaped fold having a height substantially less than the height of the corrugations, and the head-shaped fold spaced from the folded margins of the inner strips.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
US00259383A 1971-06-04 1972-06-05 Corrugated tubing Expired - Lifetime US3815639A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2127750A DE2127750C3 (de) 1971-06-04 1971-06-04 Doppelrohr

Publications (1)

Publication Number Publication Date
US3815639A true US3815639A (en) 1974-06-11

Family

ID=5809824

Family Applications (1)

Application Number Title Priority Date Filing Date
US00259383A Expired - Lifetime US3815639A (en) 1971-06-04 1972-06-05 Corrugated tubing

Country Status (12)

Country Link
US (1) US3815639A (en:Method)
JP (1) JPS5147896B1 (en:Method)
AR (1) AR193873A1 (en:Method)
BR (1) BR7203586D0 (en:Method)
CA (1) CA958659A (en:Method)
DE (1) DE2127750C3 (en:Method)
ES (1) ES403432A1 (en:Method)
FR (1) FR2141726B1 (en:Method)
GB (1) GB1397444A (en:Method)
HU (1) HU165472B (en:Method)
IT (1) IT958182B (en:Method)
SE (1) SE388258B (en:Method)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029129A (en) * 1976-03-26 1977-06-14 Laffie Harper Helical pipe lock seam
US4085604A (en) * 1976-02-09 1978-04-25 Manufacturers Systems, Inc. Method of making corrugated flexible metal tubing
US4141385A (en) * 1972-07-17 1979-02-27 Emil Siegwart Flexible corrugated tube
EP0104842A3 (en) * 1982-09-28 1984-06-27 Security Lumber & Supply Co. Improved strip of flexible corrugated material
US4481978A (en) * 1978-07-04 1984-11-13 Westaflex-Werk L.U.F. Westerbarkey Gmbh & Co. Method of manufacturing helically wound tubes and tubes manufactured by said method
US4622838A (en) * 1982-09-28 1986-11-18 Security Lumber & Supply Co. Apparatus for manufacturing flexible corrugated tubes
US4687690A (en) * 1984-02-20 1987-08-18 Rib Loc Hong Kong Limited Method of and means for forming and sealing helically wound tubes
US4714508A (en) * 1986-03-25 1987-12-22 Alopex Industries, Inc. Fixture and method for making spiral wound hose
US4753256A (en) * 1985-11-18 1988-06-28 Alopex Industries, Inc. Pool cleaner hose
US4854416A (en) * 1986-06-09 1989-08-08 Titeflex Corporation Tuned self-damping convoluted conduit
US4867269A (en) * 1987-06-30 1989-09-19 Titeflex Corporation Tuned self-damping convoluted conduit
US5074138A (en) * 1991-01-09 1991-12-24 Miller Robert F Method of making bellows pipe
US5158814A (en) * 1991-04-04 1992-10-27 Hose Master, Inc. Flexible metal conduit and method of making the same
US5158115A (en) * 1991-01-09 1992-10-27 Miller Robert E Bellows pipe construction
US5222288A (en) * 1991-06-17 1993-06-29 Tru-Flex Metal Hose Corporation Method for forming a spiral-wound flexible piping
US5350885A (en) * 1992-04-08 1994-09-27 Monogram Industries, Inc. Armored cable
US5494319A (en) * 1994-06-06 1996-02-27 Tru-Flex Metal Hose Corporation Sleeved flexible metal piping, method of manufacturing same and flue system application of same
US5538294A (en) * 1994-11-01 1996-07-23 Tru-Flex Metal Hose Corporation Corrugated flexible metal piping assembly
US6311736B2 (en) 1998-05-28 2001-11-06 Donaldson Company, Inc. Flexible hose and method for manufacturing
US6378561B1 (en) * 2001-02-24 2002-04-30 Tru-Flex Metal Hose Corp. Self-sealing flexible metal hose
US6418971B1 (en) * 2001-07-10 2002-07-16 Hose Master, Inc. Flexible metal conduit
US6488052B2 (en) * 2001-03-19 2002-12-03 Westfalia Metallformtechnik Gmbh & Co. Multilayer tube formed of profiled strip
US6497254B2 (en) * 2001-02-24 2002-12-24 Tru-Flex Metal Hose Corporation Self-sealing flexible metal hose
US6825418B1 (en) 2000-05-16 2004-11-30 Wpfy, Inc. Indicia-coded electrical cable
US20060131044A1 (en) * 2004-12-03 2006-06-22 Vertente Michael J Flexible conduit and cable
US7954530B1 (en) 2009-01-30 2011-06-07 Encore Wire Corporation Method and apparatus for applying labels to cable or conduit
US8826960B1 (en) 2009-06-15 2014-09-09 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US9409668B1 (en) 2007-06-04 2016-08-09 Encore Wire Corporation Method and apparatus for applying labels to cable
US11319104B1 (en) 2009-01-30 2022-05-03 Encore Wire Corporation System and apparatus for applying labels to cable or conduit

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950440C2 (de) * 1979-12-14 1987-01-15 Alcan Ohler GmbH, 5970 Plettenberg Wendelrohr und Verfahren zu seiner Herstellung
CA1146097A (en) * 1980-09-19 1983-05-10 Emil Siegwart Flexible corrugated tube
DE3441565A1 (de) * 1984-11-14 1986-05-15 Fritz Hahn Kg, 5500 Trier Verfahren und vorrichtung zum herstellen eines flexiblen wellrohres sowie nach dem verfahren hergestelltes flexibles wellrohr
GB2227806A (en) * 1989-02-02 1990-08-08 Steelpress Embossed ducting
AT394815B (de) * 1990-01-02 1992-06-25 Walter Schwarz Blechband, verfahren und vorrichtung zum herstellen von gefalzten schraubennahtrohren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1021567A (en) * 1911-03-24 1912-03-26 United Flex Metallic Tubing Flexible metallic tubing.
US1410160A (en) * 1915-11-18 1922-03-21 Titeflex Metal Hose Corp Method of and apparatus for forming flexible tubes
US3094147A (en) * 1961-03-22 1963-06-18 Internat Metal Hose Company Bendable tubing
US3340901A (en) * 1965-04-06 1967-09-12 Jack P Lombardi Spiral seamed corrugated laminated pipe with uncorrugated interior
US3572394A (en) * 1968-11-19 1971-03-23 Pacific Roller Die Co Inc Lock seam for helical corrugated pipe

Family Cites Families (11)

* Cited by examiner, † Cited by third party
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DE543926C (de) * 1932-05-25 Titeflex Metal Hose Co Biegsames Rippenrohr
CA835728A (en) * 1970-03-03 P. Lombardi Jack Spiral seamed corrugated laminated pipe with uncorrugated interior and method for making same
FR368329A (fr) * 1906-07-24 1906-11-24 James Soule Wilson Tube métallique flexible
US1598872A (en) * 1923-05-03 1926-09-07 Fed Metal Hose Corp Flekible metal-lined tube
GB633377A (en) * 1943-01-29 1949-12-12 Abel Edgar Chernack Improvements in or relating to flexible tubes
DE1067903B (de) * 1951-07-11 1959-10-29 Uni Tubes Ltd Durch ueberlappendes Aufwickeln von glattem Bandmaterial auf einen Wickeldorn hergestelltes Rohr
FR1245233A (fr) * 1960-01-13 1960-11-04 Fabrication de tuyaux expansibles, sur les lieux de destination
CH460680A (de) * 1967-05-11 1968-08-15 Spiro Invest S A Rohr mit schraubenlinienförmig verlaufender Falznaht
DE1650135A1 (de) * 1967-12-18 1970-08-06 Ohler Flexrohr Gmbh Wendelrohr aus wendelfoermig gewickeltem bandfoermigem Material
DE6813531U (de) * 1968-08-01 1969-07-17 Dynamit Hobel Ag Fa Wickelrohr aus kunststoffband
DE2020547A1 (de) * 1969-05-12 1970-11-26 Vulcan Australia Wendelrohr

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1021567A (en) * 1911-03-24 1912-03-26 United Flex Metallic Tubing Flexible metallic tubing.
US1410160A (en) * 1915-11-18 1922-03-21 Titeflex Metal Hose Corp Method of and apparatus for forming flexible tubes
US3094147A (en) * 1961-03-22 1963-06-18 Internat Metal Hose Company Bendable tubing
US3340901A (en) * 1965-04-06 1967-09-12 Jack P Lombardi Spiral seamed corrugated laminated pipe with uncorrugated interior
US3572394A (en) * 1968-11-19 1971-03-23 Pacific Roller Die Co Inc Lock seam for helical corrugated pipe

Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141385A (en) * 1972-07-17 1979-02-27 Emil Siegwart Flexible corrugated tube
US4085604A (en) * 1976-02-09 1978-04-25 Manufacturers Systems, Inc. Method of making corrugated flexible metal tubing
US4108212A (en) * 1976-02-09 1978-08-22 Manufacturers Systems, Inc. Corrugated flexible metal tubing and method and apparatus for making same
US4029129A (en) * 1976-03-26 1977-06-14 Laffie Harper Helical pipe lock seam
US4481978A (en) * 1978-07-04 1984-11-13 Westaflex-Werk L.U.F. Westerbarkey Gmbh & Co. Method of manufacturing helically wound tubes and tubes manufactured by said method
US4486484A (en) * 1982-09-28 1984-12-04 Security Lumber & Supply Co. Strip of flexible corrugated material
US4622838A (en) * 1982-09-28 1986-11-18 Security Lumber & Supply Co. Apparatus for manufacturing flexible corrugated tubes
EP0104842A3 (en) * 1982-09-28 1984-06-27 Security Lumber & Supply Co. Improved strip of flexible corrugated material
US4687690A (en) * 1984-02-20 1987-08-18 Rib Loc Hong Kong Limited Method of and means for forming and sealing helically wound tubes
US4753256A (en) * 1985-11-18 1988-06-28 Alopex Industries, Inc. Pool cleaner hose
US4714508A (en) * 1986-03-25 1987-12-22 Alopex Industries, Inc. Fixture and method for making spiral wound hose
US4854416A (en) * 1986-06-09 1989-08-08 Titeflex Corporation Tuned self-damping convoluted conduit
US4867269A (en) * 1987-06-30 1989-09-19 Titeflex Corporation Tuned self-damping convoluted conduit
US5158115A (en) * 1991-01-09 1992-10-27 Miller Robert E Bellows pipe construction
US5074138A (en) * 1991-01-09 1991-12-24 Miller Robert F Method of making bellows pipe
US5158814A (en) * 1991-04-04 1992-10-27 Hose Master, Inc. Flexible metal conduit and method of making the same
US5222288A (en) * 1991-06-17 1993-06-29 Tru-Flex Metal Hose Corporation Method for forming a spiral-wound flexible piping
US5228479A (en) * 1991-06-17 1993-07-20 Tru-Flex Metal Hose Corporation Multi-layered flexible piping and method and machine for forming same
US5557071A (en) * 1992-04-08 1996-09-17 Wpfy, Inc. Armored cable
US5468914A (en) * 1992-04-08 1995-11-21 Monogram Industries Inc. Armored cable
US5350885A (en) * 1992-04-08 1994-09-27 Monogram Industries, Inc. Armored cable
US5708235A (en) * 1992-04-08 1998-01-13 Wpfy, Inc. Armored cable
USRE38345E1 (en) * 1992-04-08 2003-12-16 Wpfy, Inc. Armored cable
US5494319A (en) * 1994-06-06 1996-02-27 Tru-Flex Metal Hose Corporation Sleeved flexible metal piping, method of manufacturing same and flue system application of same
US5538294A (en) * 1994-11-01 1996-07-23 Tru-Flex Metal Hose Corporation Corrugated flexible metal piping assembly
US6311736B2 (en) 1998-05-28 2001-11-06 Donaldson Company, Inc. Flexible hose and method for manufacturing
US8278554B2 (en) 2000-05-16 2012-10-02 Wpfy, Inc. Indicia-coded electrical cable
US20090084575A1 (en) * 2000-05-16 2009-04-02 Dollins James C Indicia-Marked Electrical Cable
US7465878B2 (en) 2000-05-16 2008-12-16 Wpfy, Inc. Indicia-marked electrical cable
US20050016754A1 (en) * 2000-05-16 2005-01-27 Wpfy, Inc., A Delaware Corporation Indicia-marked electrical cable
US6825418B1 (en) 2000-05-16 2004-11-30 Wpfy, Inc. Indicia-coded electrical cable
US6497254B2 (en) * 2001-02-24 2002-12-24 Tru-Flex Metal Hose Corporation Self-sealing flexible metal hose
US6378561B1 (en) * 2001-02-24 2002-04-30 Tru-Flex Metal Hose Corp. Self-sealing flexible metal hose
US6488052B2 (en) * 2001-03-19 2002-12-03 Westfalia Metallformtechnik Gmbh & Co. Multilayer tube formed of profiled strip
US6418971B1 (en) * 2001-07-10 2002-07-16 Hose Master, Inc. Flexible metal conduit
US7420120B2 (en) 2004-12-03 2008-09-02 Wpfy, Inc. Flexible conduit and cable
US20060131044A1 (en) * 2004-12-03 2006-06-22 Vertente Michael J Flexible conduit and cable
US11667085B1 (en) 2007-06-04 2023-06-06 Encore Wire Corporation Method and apparatus for applying labels to cable
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US7954530B1 (en) 2009-01-30 2011-06-07 Encore Wire Corporation Method and apparatus for applying labels to cable or conduit
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US12091207B1 (en) 2009-01-30 2024-09-17 Encore Wire Corporation Method for applying labels to cable or conduit
US8826960B1 (en) 2009-06-15 2014-09-09 Encore Wire Corporation System and apparatus for applying labels to cable or conduit

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Publication number Publication date
CA958659A (en) 1974-12-03
FR2141726B1 (en:Method) 1973-07-13
SE388258B (sv) 1976-09-27
BR7203586D0 (pt) 1973-06-26
JPS5147896B1 (en:Method) 1976-12-17
DE2127750B2 (en:Method) 1973-12-06
ES403432A1 (es) 1975-05-01
DE2127750C3 (de) 1981-04-09
GB1397444A (en) 1975-06-11
DE2127750A1 (en:Method) 1972-12-07
FR2141726A1 (en:Method) 1973-01-26
AR193873A1 (es) 1973-05-31
IT958182B (it) 1973-10-20
HU165472B (en:Method) 1974-08-28

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