US2363358A - Method of making sheet metal can bodies - Google Patents

Method of making sheet metal can bodies Download PDF

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Publication number
US2363358A
US2363358A US455643A US45564342A US2363358A US 2363358 A US2363358 A US 2363358A US 455643 A US455643 A US 455643A US 45564342 A US45564342 A US 45564342A US 2363358 A US2363358 A US 2363358A
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United States
Prior art keywords
hook
hooks
metal
strip
bodies
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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
Application number
US455643A
Inventor
William F Punte
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Continental Can Co Inc
Original Assignee
Continental Can Co Inc
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.)
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Publication date
Application filed by Continental Can Co Inc filed Critical Continental Can Co Inc
Priority to US455643A priority Critical patent/US2363358A/en
Application granted granted Critical
Publication of US2363358A publication Critical patent/US2363358A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2676—Cans or tins having longitudinal or helical seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/28—Folding the longitudinal seam
    • 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
    • Y10S83/00—Cutting
    • Y10S83/917—Notching
    • 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
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0524—Plural cutting steps
    • Y10T83/0538—Repetitive transverse severing from leading edge of work
    • Y10T83/0567—Nonrectilinear cutting

Definitions

  • the invention relates to new and useful improvements in the method of making can bodies and more particularly to a can body wherein the side seam ilsof the lock and lap type.
  • An object of the invention is to provide a method of forming can bodies from metal strips wherein the portions which are to form the hooks at one end of the body blanks are so shaped that the hooks for two blanks may be formed from a metal portion in the strip which is no wider than the length of a single hook and thus reduce the waste material to a minimum.
  • Figure l is a plan View showing more or less diagrammatically the manner of 'y cutting a strip to provide the body blanks for two can bodies;
  • Figure 2 is a sectional view through one of the body blanks with the hooks formed thereon;
  • Figure 3 is a view showing the blank bent to form the can body and previous to the interlocking of the hooks
  • Figure 4 is an outside view of a portion of the can body and showing the completed side seam
  • Figure 5 is a section on the line 6-6 of Figure 4.
  • Figure 6 is a section on the line 6 6 of Figure 4.
  • Figure 7 is a section on the line 1-1 of Figure 4.
  • Figure 8 is a section on the line 8-8 of Figure 4.
  • 'Ihe improved can body is made from metaly blanks which are indicated at I in Figure 1 of the drawing.
  • the blank may be of black iron or tin coated sheets of black iron or any other suitable metal.
  • 'I'he blanks may be made from sheets or they may be made from a strip of metal. In either case the invention has to do with the shaping of one of the hooks forming the side seam so as to save metal. The method of cutting the hooks will be described in connection with the forming of the body blanks from a strip of metal.
  • FIG 1 there is shown two body blanks which are cut from a .strip of metal, the width of the strip being the length of the formed can body.
  • the strip is cut along lines transversely of the strip. Alternate lines are lstr-aight. These straight lines are indicated at 2-2 in Figure 1.
  • the line of cutting of the strip in between the straight lines is so shaped as to form the hooks for the two body blanks from a metal portion which is no wider than the length of a single hook'.
  • the strip is notched so as to 55 cut out portions 3-3 at each side of the strip and it is cut along a zig-zag line so as to form projecting hook portions 4--4 which are similar in construction and .which are Vshaped with the side edges formed on the same angle and intersecting at the base of the hook portions.
  • the hook portions 5-5 on one of the blanks are only half the size of the/ other hooks, but the inclined edge of this portion intersects the inclinededge of the adjacerft hook at the base line of the hooks.
  • the cut-away portions 3 form lap sections 6-6 for the side seam.
  • the body blank is slit at the ends opposite these V- shaped hooks along lines I-l and this forms a hook portion 8 which extends from one lap section 9 to the other lap section 9.
  • the hook portions 4-4 are substantially the same length from the base line to the tips thereof as the hook portion 8.
  • the body blanks After the body blanks are cut as described above, they may be selected promiscuously as they are interchangeable and then they are shaped into body form as indicated at A in Figure 3. 'I'he hooks 4-4 are then interlocked with the hook 8 and the seam is bumped. l'n Figure 4 the completed seam is shown and it will be noted that the hooks 4 extend to the base of the hook 8 and likewise the hook 8 extends to the base of the hooks 4.
  • the hook 8 is usually referred to as the inner hook while the hooks 4 are the outer hooks.
  • Figures 5 to 8 of the -drawing are sections through the side seam transversely thereof.
  • the body wall is shown as straight instead of curved.
  • the outer lap section 6 is shown solder bonded to the inner lap section 9 by a solder bond I8.
  • the lap section is inset so that the outer face of the lap section 6 is in alignment with the outer face of the body wall.
  • FIG. 6 is a section through the V-shaped hook at the vertex of the hook which is indicated at II.
  • the edge of the hook 8 which interlocks with this V-shaped portion 4 is indicated at I2.
  • I1 At this portion of the side seam we have in effect two full width hooks interlocked with each other and joined by the solder bond which is indicated at I9.
  • Figure 7 is a section through the side seam at the point where the side edges of adjacent hook portions intersect and this is the base line of the V-shaped hook portions. This intersecting line of the edges of the adjacent hooks is indicated at I3 in Figure 7.
  • 'I'he hook 8 of course is of full length but there is no hook portion 4 at this portion of the side seam.
  • the metal in the body wall carrying the inner hook 8 is bumped into the v of the interlocked seam portions, the metal of the interlocked parts will be brought into-intimate contact and this results in this depressing of the metal in the body wall into the space'between the I hooksd.
  • Figure 8 is a section taken through the seam between the extreme end ci the V-shaped hooks and the point where the side edges of the hooks intersect at the base line.
  • This provides a relatively short outer hook portion I5 which interlocks with the hook portion 8 and the metal is bent inwardly as indicated at I4 so that said inwardly bent portion makes intimate contact with the hook 8 inthe region between the end of the hook portion I5 and the base of the hook 8.
  • base of the hook 8 is meant the portion where the metal is bent back upon itself to form the hook. I'his base of the hook 8 is indicated at I6.
  • the base of the hook portions Il is indicated at I'I.
  • a can body is produced with a lock and lap solder bonded side seam wherein there is a considerable saving of metal for the -reason that the hooks at 4the ends of the body blanks of two can bodies are formed from a portion of metal. no wider than that necessary for forming a single hook. Furthermore, these hooks are formed so that the body blanks are reversible and may promiscuously used in the forming of can bodies.
  • Method of forming a sheet metal can body blank comprising providing a strip of metal of a width equal to the length of the can body, cutting said strip into body blanks by transverse cutting lines alternate cutting lines being straight and at right angles to the side edges of the strip, slitting said straight edge to form a hook between the slits and laps at the ends thereof, notching said strip intermediate the straight lines for forming lap sections and cutting said strip along a zig-zag line from one notch to the other se as to provide V-shaped hook portions, the adjacent sides of which intersect at the base line or the hook portions.

Description

Nov. 21, 1944. w, F. PUNTE 2,363,358
METHOD OF MAKING SHEET METAL CAN BODIES Filed Aug. 21, 1942 Patented Nea/21, 1944 G `SHEET LIETAL CAN METHOD O F I B ODIES William F. Punte, Passaic, N. J., assignor to Continental Can-Company, Inc., New York, N. Y., a corporation of New York Application August 21, 1942, Serial No. 455,643
1 Claim.
The invention relates to new and useful improvements in the method of making can bodies and more particularly to a can body wherein the side seam ilsof the lock and lap type.
An object of the invention is to provide a method of forming can bodies from metal strips wherein the portions which are to form the hooks at one end of the body blanks are so shaped that the hooks for two blanks may be formed from a metal portion in the strip which is no wider than the length of a single hook and thus reduce the waste material to a minimum.
In the drawing, which shows by way of illustration one embodiment of the invention- Figure l is a plan View showing more or less diagrammatically the manner of 'y cutting a strip to provide the body blanks for two can bodies;
Figure 2 is a sectional view through one of the body blanks with the hooks formed thereon;
Figure 3 is a view showing the blank bent to form the can body and previous to the interlocking of the hooks;
Figure 4 is an outside view of a portion of the can body and showing the completed side seam;
Figure 5 is a section on the line 6-6 of Figure 4;
Figure 6 is a section on the line 6 6 of Figure 4;
Figure 7 is a section on the line 1-1 of Figure 4;
Figure 8 is a section on the line 8-8 of Figure 4.
'Ihe improved can body is made from metaly blanks which are indicated at I in Figure 1 of the drawing. The blank may be of black iron or tin coated sheets of black iron or any other suitable metal. 'I'he blanks may be made from sheets or they may be made from a strip of metal. In either case the invention has to do with the shaping of one of the hooks forming the side seam so as to save metal. The method of cutting the hooks will be described in connection with the forming of the body blanks from a strip of metal.
In Figure 1 there is shown two body blanks which are cut from a .strip of metal, the width of the strip being the length of the formed can body. The strip is cut along lines transversely of the strip. Alternate lines are lstr-aight. These straight lines are indicated at 2-2 in Figure 1. The line of cutting of the strip in between the straight lines is so shaped as to form the hooks for the two body blanks from a metal portion which is no wider than the length of a single hook'. The strip is notched so as to 55 cut out portions 3-3 at each side of the strip and it is cut along a zig-zag line so as to form projecting hook portions 4--4 which are similar in construction and .which are Vshaped with the side edges formed on the same angle and intersecting at the base of the hook portions.
The hook portions 5-5 on one of the blanks are only half the size of the/ other hooks, but the inclined edge of this portion intersects the inclinededge of the adjacerft hook at the base line of the hooks. The cut-away portions 3 form lap sections 6-6 for the side seam. The body blank is slit at the ends opposite these V- shaped hooks along lines I-l and this forms a hook portion 8 which extends from one lap section 9 to the other lap section 9. The hook portions 4-4 are substantially the same length from the base line to the tips thereof as the hook portion 8.
After the body blanks are cut as described above, they may be selected promiscuously as they are interchangeable and then they are shaped into body form as indicated at A in Figure 3. 'I'he hooks 4-4 are then interlocked with the hook 8 and the seam is bumped. l'n Figure 4 the completed seam is shown and it will be noted that the hooks 4 extend to the base of the hook 8 and likewise the hook 8 extends to the base of the hooks 4. The hook 8 is usually referred to as the inner hook while the hooks 4 are the outer hooks.
Figures 5 to 8 of the -drawing are sections through the side seam transversely thereof. For the purpose of illustration the body wall is shown as straight instead of curved. In Figure 5 the outer lap section 6 is shown solder bonded to the inner lap section 9 by a solder bond I8. During the bumping of this portion of the side seam the lap section is inset so that the outer face of the lap section 6 is in alignment with the outer face of the body wall.
Figure 6 is a section through the V-shaped hook at the vertex of the hook which is indicated at II. The edge of the hook 8 which interlocks with this V-shaped portion 4 is indicated at I2. At this portion of the side seam we have in effect two full width hooks interlocked with each other and joined by the solder bond which is indicated at I9.
Figure 7 is a section through the side seam at the point where the side edges of adjacent hook portions intersect and this is the base line of the V-shaped hook portions. This intersecting line of the edges of the adjacent hooks is indicated at I3 in Figure 7. 'I'he hook 8 of course is of full length but there is no hook portion 4 at this portion of the side seam. The metal in the body wall carrying the inner hook 8 is bumped into the v of the interlocked seam portions, the metal of the interlocked parts will be brought into-intimate contact and this results in this depressing of the metal in the body wall into the space'between the I hooksd.
Figure 8 is a section taken through the seam between the extreme end ci the V-shaped hooks and the point where the side edges of the hooks intersect at the base line. This, of course, provides a relatively short outer hook portion I5 which interlocks with the hook portion 8 and the metal is bent inwardly as indicated at I4 so that said inwardly bent portion makes intimate contact with the hook 8 inthe region between the end of the hook portion I5 and the base of the hook 8. By the term base of the hook 8 is meant the portion where the metal is bent back upon itself to form the hook. I'his base of the hook 8 is indicated at I6. The base of the hook portions Il is indicated at I'I.
From the above description it will be apparent that a can body is produced with a lock and lap solder bonded side seam wherein there is a considerable saving of metal for the -reason that the hooks at 4the ends of the body blanks of two can bodies are formed from a portion of metal. no wider than that necessary for forming a single hook. Furthermore, these hooks are formed so that the body blanks are reversible and may promiscuously used in the forming of can bodies.
Not only is there a saving of metal, but when one edge is provided with a plurality of v-shaped projecting hooks, this greatly facilitates the solder-bonding of the seam. In Figure 8 it will be noted that the solder bond which is indicated at I0 can ow into the side seam at the base of the V-shaped projecting hook portions and along both sides of the hook 8. At the portion of the side seam indicated in Figure 8, again the solder bond which is indicated at I0, can :dow readily into the side seam and comes into contact with the inner hook substantially at the middle of the side seam. This construction of side seam not only aids in the solder bonding oi the side seam, but it also strengthens it because of the bending of the body blank into the recesses between the V- shaped hook portions.
It is obvious that minor changes in the details of construction and arrangement of parts may be made without departing from the spirit of the invention as set forth in the utppended claim.
What I claim is:
Method of forming a sheet metal can body blank comprising providing a strip of metal of a width equal to the length of the can body, cutting said strip into body blanks by transverse cutting lines alternate cutting lines being straight and at right angles to the side edges of the strip, slitting said straight edge to form a hook between the slits and laps at the ends thereof, notching said strip intermediate the straight lines for forming lap sections and cutting said strip along a zig-zag line from one notch to the other se as to provide V-shaped hook portions, the adjacent sides of which intersect at the base line or the hook portions.
, WILLIAM F. PUN'IE.
US455643A 1942-08-21 1942-08-21 Method of making sheet metal can bodies Expired - Lifetime US2363358A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2529725A (en) * 1948-09-10 1950-11-14 Dacam Corp Bottle carton
US2614666A (en) * 1946-02-14 1952-10-21 Gen Bronze Corp Corner joint
US3225633A (en) * 1961-10-18 1965-12-28 American Mach & Foundry Tobacco web feed with universal binder shaper
US3332711A (en) * 1964-04-22 1967-07-25 John G Holly Lock seam joint
US3879916A (en) * 1974-07-22 1975-04-29 Us Air Force Fatigue resistant spanwise splice
US5604044A (en) * 1992-12-28 1997-02-18 Mccabe; Charles J. Blanks for sheet material forming process
US20070210579A1 (en) * 2006-03-09 2007-09-13 Lindab, Inc. Systems and methods for reinforcing joined segments of duct work
WO2008058765A1 (en) * 2006-11-17 2008-05-22 Reinz-Dichtungs-Gmbh Multi-part component, in particular a multi-part heat shield
US20110006516A1 (en) * 2007-05-08 2011-01-13 Young Sik Shin Binding pipe body and binding method of pipe body used of brazing
US20150291271A1 (en) * 2014-04-10 2015-10-15 Kent W. Benner System and Method for Fastening Structures

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614666A (en) * 1946-02-14 1952-10-21 Gen Bronze Corp Corner joint
US2529725A (en) * 1948-09-10 1950-11-14 Dacam Corp Bottle carton
US3225633A (en) * 1961-10-18 1965-12-28 American Mach & Foundry Tobacco web feed with universal binder shaper
US3332711A (en) * 1964-04-22 1967-07-25 John G Holly Lock seam joint
US3879916A (en) * 1974-07-22 1975-04-29 Us Air Force Fatigue resistant spanwise splice
US5604044A (en) * 1992-12-28 1997-02-18 Mccabe; Charles J. Blanks for sheet material forming process
US20070210579A1 (en) * 2006-03-09 2007-09-13 Lindab, Inc. Systems and methods for reinforcing joined segments of duct work
WO2008058765A1 (en) * 2006-11-17 2008-05-22 Reinz-Dichtungs-Gmbh Multi-part component, in particular a multi-part heat shield
US20110006516A1 (en) * 2007-05-08 2011-01-13 Young Sik Shin Binding pipe body and binding method of pipe body used of brazing
US20150291271A1 (en) * 2014-04-10 2015-10-15 Kent W. Benner System and Method for Fastening Structures
US9676469B2 (en) * 2014-04-10 2017-06-13 Lockheed Martin Corporation System and method for fastening structures

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