US3864814A - Seaming method for sheet metal ducts - Google Patents

Seaming method for sheet metal ducts Download PDF

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Publication number
US3864814A
US3864814A US372705A US37270573A US3864814A US 3864814 A US3864814 A US 3864814A US 372705 A US372705 A US 372705A US 37270573 A US37270573 A US 37270573A US 3864814 A US3864814 A US 3864814A
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US
United States
Prior art keywords
strip
seam
bends
packing
edges
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
US372705A
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English (en)
Inventor
John Bagge
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.)
Valmet Oy
Original Assignee
Valmet Oy
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 Valmet Oy filed Critical Valmet Oy
Application granted granted Critical
Publication of US3864814A publication Critical patent/US3864814A/en
Anticipated expiration legal-status Critical
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
    • F16L23/00—Flanged joints
    • F16L23/12—Flanged joints specially adapted for particular pipes
    • F16L23/14—Flanged joints specially adapted for particular pipes for rectangular pipes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49924—Joining by deforming of parallel side-by-side elongated members

Definitions

  • the improved method of the present invention ensures superior tightness of the seams as well as greater rigidity of the duct entities than before. and it is particularly characterized in that the bends made on the duct edges are half-closed (bent at an angle between and as opposed to fully closed 180) bends in prior art, that a strip of a packing material is placed in the seam, and the seam is secured with a push-on strip having a substantially triangular cross section. This latter operation is performed with the aid of a special tool, which urges the central part of the strip against the packing and simultaneously supports the lateral components wings of the seam from below or even raises them.
  • optional characteristics specify an advantageous cross section shape of the packing strip and additional bending operations concerning the lateral wings of the seam and intended to impart the completed ducting greater rigidity.
  • the present invention concerns a method for seaming sheet metal ducts, especially transversal seaming of ducts, wherein a push strip joint is employed, composed of bends made of the edges of the walls of the ducts to be joined and of a strip to be pushed over these.
  • the aim of the present invention is to avoid the drawbacks pointed out and to accomplish a simple seaming method based on the push strip joint.
  • the aims of the invention are achieved in a method which is mainly characterized in that the edges to be joined are provided with half-closed bends, and the seam is provided with a packing and secured with a strip having a cross section of substantially triangular shape, and the seam thus obtained is made tight with the aid of a tool appropriate to this purpose by urging the central part of the strip against the packing, while at the same time supporting and/or raising the seam from under the strip.
  • FIG. 1a shows a seam according to the invention, already fitted with a push strip and a packing, prior to its final tightening and closure.
  • FIG. 1b shows the seam of FIG. 1a, finished to be tight.
  • FIG. 2a shows a raised seam prior to tightening
  • FIG. 2b shows the same seam, finished to be tight.
  • FIG. 3a shows a seam which is wider than the preceding ones
  • FIG. 3b shows the same seam, completed after its tightening and bending operations.
  • the seam may be provided with a raised ridge 4 (FIGS. and 2b) and/or the seam may be made so wide that (FIG. 3) the wings 2, 5a and 2', 5b of the seam may be bent, for instance, to be substantially perpendicular to the wall of the duct (FIG. 3b).
  • a strip-like packing 3 which has a cross section preferably similar in shape with the push strip 2 (in FIGS. Ia and 2a triangular).
  • the shape and material of the packing 3 may vary within wide limits, depending on the particular application.
  • the edges la and lb of the duct sections are provided with halfclosed bends 5a and 5b, the packing 3 is placed into position, and the push strip 2 is pushed over the packing 3 and the bends 5a and 5b in conventional manner.
  • the end of the push strip 2 may be provided with a tongue (not depicted), which is bent at an angle after the push strip 2 has been pushed into position. In this manner the untightened seams of FIGS. 1a, 2a and 3a are produced.
  • a suitable traction tool (not depicted) is used to press the central part of the push strip 2 against the packing 3, while at the same time the tool supportsand/or raises the wings 2, 5a and 2, 5b of the seam, which are directed obliquely outward from the duct wall, by acting upon them in the wedge-shaped space between the wall and the wings.
  • This enables the seam to be efficiently braced during the tightening operation.
  • the same tool, or another tool may be used to produce the rigidityinducing bends of FIG. 3b.
  • the tool for use in the seaming operation just described may be designed in many different ways.
  • the tool may be of the sliding type and provided with wedge-shaped pressing and supporting projections. Instead of a fixed tool, one may use an equivalent tool provided with rotatable rollers.
  • the seam is fin ished and has the appearance shown in FIGS. lb, 2b and 3b.
  • Method of seaming the opposed edges of sheet metal ducts, particularly for use in transversely seaming ducts, comprising:

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Duct Arrangements (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Gasket Seals (AREA)
  • Connection Of Plates (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US372705A 1972-07-03 1973-06-22 Seaming method for sheet metal ducts Expired - Lifetime US3864814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI721890A FI49248C (fi) 1972-07-03 1972-07-03 Peltikanavien saumausmenetelmä.

Publications (1)

Publication Number Publication Date
US3864814A true US3864814A (en) 1975-02-11

Family

ID=8506368

Family Applications (1)

Application Number Title Priority Date Filing Date
US372705A Expired - Lifetime US3864814A (en) 1972-07-03 1973-06-22 Seaming method for sheet metal ducts

Country Status (7)

Country Link
US (1) US3864814A (de)
JP (1) JPS4952759A (de)
CA (1) CA983324A (de)
DE (1) DE2332482C3 (de)
DK (1) DK135689C (de)
FI (1) FI49248C (de)
SE (1) SE390441B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716750A (en) * 1985-04-02 1988-01-05 Valtiero Tizzi Process for obtaining composite hollow members from variegated longitudinal strips, embodied with or without a removable core
US20040011769A1 (en) * 2002-05-04 2004-01-22 Wolfgang Fussnegger Peripheral connecting region of two sheets and peripheral connection method
US20050081774A1 (en) * 2001-10-30 2005-04-21 Dana Eagles Segment formed flexible fluid containment vessel
US20100132749A1 (en) * 2006-11-23 2010-06-03 Bsh Bosch Und Siemens Hausgerate Gmbh Water-conducting household appliance having a treatment container assembled from at least two components
US9511409B2 (en) * 2011-01-26 2016-12-06 Vicon Machinery Llc Apparatus for closing Pittsburgh seams associated with duct assemblies and other box-shaped members
CN110355288A (zh) * 2019-07-22 2019-10-22 无锡蓝力智能装备有限公司 板式换热器片数控精密成形成套装备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389248B (de) * 1988-02-08 1989-11-10 Vaillant Gmbh Verfahren zur herstellung eines oberteils eines gasbrenners und nach dem verfahren hergestellter gasbrenneroberteil
JP2016188670A (ja) * 2015-03-30 2016-11-04 株式会社栗本鐵工所 金属板のハゼカシメ構造

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2036725A (en) * 1934-05-28 1936-04-07 Carl R Schlicht Tool for seaming sheet metal
US3302825A (en) * 1964-04-15 1967-02-07 Bilnor Corp Open top liquid container
US3545147A (en) * 1968-07-25 1970-12-08 Winbro Inc Sheet metal roofing panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2036725A (en) * 1934-05-28 1936-04-07 Carl R Schlicht Tool for seaming sheet metal
US3302825A (en) * 1964-04-15 1967-02-07 Bilnor Corp Open top liquid container
US3545147A (en) * 1968-07-25 1970-12-08 Winbro Inc Sheet metal roofing panel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716750A (en) * 1985-04-02 1988-01-05 Valtiero Tizzi Process for obtaining composite hollow members from variegated longitudinal strips, embodied with or without a removable core
US20050081774A1 (en) * 2001-10-30 2005-04-21 Dana Eagles Segment formed flexible fluid containment vessel
US7024748B2 (en) * 2001-10-30 2006-04-11 Albany International Corp. Segment formed flexible fluid containment vessel
US20040011769A1 (en) * 2002-05-04 2004-01-22 Wolfgang Fussnegger Peripheral connecting region of two sheets and peripheral connection method
US7104719B2 (en) * 2002-05-04 2006-09-12 Daimlerchrysler Ag Peripheral connecting region of two sheets and peripheral connection method
US20100132749A1 (en) * 2006-11-23 2010-06-03 Bsh Bosch Und Siemens Hausgerate Gmbh Water-conducting household appliance having a treatment container assembled from at least two components
US9005370B2 (en) 2006-11-23 2015-04-14 Bsh Bosch Und Siemens Hausgeraete Gmbh Water-conducting household appliance having a treatment container assembled from at least two components
US9511409B2 (en) * 2011-01-26 2016-12-06 Vicon Machinery Llc Apparatus for closing Pittsburgh seams associated with duct assemblies and other box-shaped members
CN110355288A (zh) * 2019-07-22 2019-10-22 无锡蓝力智能装备有限公司 板式换热器片数控精密成形成套装备

Also Published As

Publication number Publication date
CA983324A (en) 1976-02-10
SE390441B (sv) 1976-12-20
JPS4952759A (de) 1974-05-22
DK135689C (da) 1977-11-14
DE2332482B2 (de) 1978-01-12
DK135689B (da) 1977-06-06
FI49248C (fi) 1975-05-12
FI49248B (de) 1975-01-31
DE2332482A1 (de) 1974-01-24
DE2332482C3 (de) 1978-10-19

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