US3611509A - Method and apparatus for forming clips - Google Patents
Method and apparatus for forming clips Download PDFInfo
- Publication number
- US3611509A US3611509A US878437A US3611509DA US3611509A US 3611509 A US3611509 A US 3611509A US 878437 A US878437 A US 878437A US 3611509D A US3611509D A US 3611509DA US 3611509 A US3611509 A US 3611509A
- Authority
- US
- United States
- Prior art keywords
- wire
- clip
- clips
- legs
- forming
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
- B21G7/00—Making pins of U-like shape or split-pins
- B21G7/02—Making pins of U-like shape or split-pins of U-like shape
-
- 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
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/92—Staple
-
- 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
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/15—Bag fasteners
- Y10T24/152—Swedged bag tie
Definitions
- This invention relates to a method and apparatus for forming U-shaped clips of the type employed for tying flexible containers, such as plastic bags, sausage casings and the like. Such clips are deformed around the article to be sealed by urging the free ends of the opposed legs of the clip against a die having arcuate grooves so that the opposed legs are deformed and crossed over each other. This operation is disclosed in US. Pat. No. 3,400,433.
- the main object of the present invention is to eliminate certain undesirable results heretofore attending the type of sealing operation shown in the above noted Pat. No. 3,400,433. This is accomplished by forming the free ends of the opposed legs of the clip so that a less intense concentrated pressure results between said free ends and the cooperating die.
- Another object of the invention is the provision of a method and apparatus for preforming the ends of the legs of a U-shaped clip in a simple and inexpensive manner by modifying the shape of the wire from which the clips are formed.
- US. patent application Ser. No. 808,511 a method of feeding and forming wire toward a clip forming operation and which method and apparatus may be the same as that employed for feeding and forming the clip wire of the instant invention.
- the step of modifying the wire shape in accordance with the present invention may be carried out at the cutoff block designated 26 in application Ser. No. 808,511.
- FIG. 1 is a semischematic top plan view of a portion of the length of wire being fed to the clip forming operation such as that shown in US. Ser. No. 808,511.
- FIG. 2 is a transverse sectional view through the wire showing the notching and swaging punch.
- FIG. 3 is a side elevation of the clip which is ultimately formed.
- FIG. 4 is a schematic sectional view through the clip deforming die showing the engagement of the free end of a clip leg with the die groove.
- a cutoff block 26 is indicated which may be similar to the cutoif block indicated at 26 in the above noted pending application.
- Slidably supported for vertical reciprocation by suitable means is a punch 10 which is adapted to reciprocate from an upper position clear of the wire 11 to a lower position at which the wire is partially cut and swaged.
- the wire 11 moves intermittently to the right in FIG. 1 as described in application Ser. No. 808,511 and the modified wire is shown at the right hand end of the figure.
- Punch 10 is provided with a pair of spaced cutting edges 12, 13 from which the forming surfaces flare outwardly to both sides of said punch along arcuate surfaces as indicated.
- the inner end of the slot defined by the opposed cutting edges 12, 13 is rounded as best seen in FIG. 2 to provide arcuate surfaces 14 on both sides of the inner circular cutting edge 15.
- the contours of said surfaces 14 are preferably circular arcs.
- the portion of the die .30 first engaged by the legs 23, 24 is the bottom 25 of an arcuate groove 26.
- the generally spherical surface 20 of the clip legs engaging the groove 26 does so with a relatively large contact area so that the bearing pressure between the two surfaces is not sufficiently high to cause galling or, if the ends of the clips are waxed, the pressure is not sufiiciently high to cause the wax to be squeezed out of the area of engagement. Not only does this result in longer life of the die, but there is less likelihood of slivers of the clip material being deposited on the die. Such slivers are sometimes caused by the swaging action of the legs on the clip which causes the material of the clip to be wiped back to form a relatively thin section of clip material which may fall off and impair the clip forming operation.
- Another advantage of the invention is that the reduction in friction between the clip legs and the die results in a smoother and tighter seal being formed around the article to which the clip is attached.
- the surface 20 which engages the die 30 is toroidal in contour but in view of the relatively small area involved it may be considered to be substantially spherical or ball shaped.
- Apparatus for forming Wire comprising:
- a cutting and swaging punch adapted to be reciprocated vertically toward and away from a length of wire and at right angles thereto
- said punch being formed with a slot having its opposite. sides formed with straight cutting edges spaced apart a distance less than the width of said wire and adapted to cut the opposite sides of said wire,
- the inner end of said slot being formed to a semicircular cutting edge in continuation of said straight cutting edges and adapted to cut the topof said wire
- said slot being formed with opposite arouate surfaces diverging away from said straight and semicircular cutting edges toward the opposite sides of said punch,
- a clip adapted for use in sealing a flexible container such as a sausage casing or the like comprising:
- the free ends of said legs being formed to provide arcuate surfaces directed oppositely outwardly of said ends.
- a clip according to claim 8 wherein said arcuate surfaces are substantially spherical segments.
- a clip according to claim -8 wherein said arcuate surfaces are formed by a punchhaving toroidal work forming surfaces.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wire Processing (AREA)
Abstract
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87843769A | 1969-11-20 | 1969-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3611509A true US3611509A (en) | 1971-10-12 |
Family
ID=25372030
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US878437A Expired - Lifetime US3611509A (en) | 1969-11-20 | 1969-11-20 | Method and apparatus for forming clips |
Country Status (1)
Country | Link |
---|---|
US (1) | US3611509A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4525898A (en) * | 1983-08-11 | 1985-07-02 | Tipper Tie, Inc. | Inverted tee cross section clip |
US6401306B1 (en) * | 1997-01-11 | 2002-06-11 | Poly-Clip System Gmbh & Co. Kg | Sealing clip for bags and tubes, and matrix for sealing the latter |
-
1969
- 1969-11-20 US US878437A patent/US3611509A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4525898A (en) * | 1983-08-11 | 1985-07-02 | Tipper Tie, Inc. | Inverted tee cross section clip |
US6401306B1 (en) * | 1997-01-11 | 2002-06-11 | Poly-Clip System Gmbh & Co. Kg | Sealing clip for bags and tubes, and matrix for sealing the latter |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DELAWARE CAPITAL FORMATION, INC., 1100 NORTH MARKE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TIPPER TIE, INC.,;REEL/FRAME:004692/0282 Effective date: 19870403 |
|
AS | Assignment |
Owner name: DELAWARE CAPITAL FORMATION, INC.,DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TIPPER TIE, INC.;REEL/FRAME:004764/0339 Effective date: 19870813 Owner name: DELAWARE CAPITAL FORMATION, INC., RODNEY SQUARE NO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:TIPPER TIE, INC.;REEL/FRAME:004764/0339 Effective date: 19870813 |
|
AS | Assignment |
Owner name: CHASE MANHATTAN BANK, N.A., THE, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:RHEEM MANUFACTURING COMPANY, A DE CORP.;REEL/FRAME:006528/0013 Effective date: 19930405 |