US3771476A - Method and apparatus for necking-in tubular members - Google Patents

Method and apparatus for necking-in tubular members Download PDF

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Publication number
US3771476A
US3771476A US00231207A US3771476DA US3771476A US 3771476 A US3771476 A US 3771476A US 00231207 A US00231207 A US 00231207A US 3771476D A US3771476D A US 3771476DA US 3771476 A US3771476 A US 3771476A
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Prior art keywords
pilot
tubular member
die
edge portion
wall
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Expired - Lifetime
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US00231207A
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English (en)
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C Heinle
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Rexam Beverage Can Co
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Individual
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Assigned to AMERICAN CAN PACKAGING INC. reassignment AMERICAN CAN PACKAGING INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMERICAN CAN COMPANY, A NJ CORP.
Assigned to AMERICAN NATIONAL CAN COMPANY reassignment AMERICAN NATIONAL CAN COMPANY MERGER (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN CAN PACKAGING INC., NATIONAL CAN CORPORATION (CHANGED TO), TRAFALGAR INDUSTRIES, INC. (MERGED INTO)
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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
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/261—Making other particular articles wheels or the like pulleys
    • 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
    • B21D51/2615—Edge treatment of cans or tins
    • 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
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/2638—Necking

Definitions

  • ABSTRACT Method and die assembly for necking-in tubular members
  • the die assembly comprises an outer reducing die and an inner die pilot comprised of a T- vided between the pilot ring supporting surfaces and' the outer reducing die.
  • the outer reducing die is brought into telescoping engagement with the marginal edge portion of the wall of a tubular member. This causes the reducing die directing surface to direct the marginal edge portion inwardly against the pilot ring step whereby the edge portion is directed into a groove formed by the pilot ring, the outer reducing die and a control surface which transversely engages the edge of the wall and controls its axial movement in relation to the die assembly.
  • the marginal edge portion is formed into a rim of reduced diameter.
  • the method and die assembly accomodates can bodies having side seams and utilizes a spring means to compensate for irregularities in and for changes in wall length which occur during the necking-in operation.
  • This invention relates to the necking-in of tubular 5 members. More particularly, the invention relates to necking-in, i.e. reducing the diameter of or forming a neck in, one or both ends of metal can bodies often having side seams of double metal thickness, and coatof the die assembly to greatly reduce the friction and compressive forces exerted by the die surfaces on tubular walls being worked and thereby greatly minimize the amount of scratches, scores and other defects which usually appear in the necked-in wall surfaces.
  • FIG. 1 is an enlarged fragmentary vertical section taken through an outer reducing die and an inner die pilot of a die assembly, and through the top of a straight-walled tubular can body aligned for entry into the forming area of the die assembly.
  • FIG. 2 is an enlarged fragmentary side view of the top of the can body of FIG. 1 after it has been necked-in with the die assembly of FIG. 1.
  • FIG. 3 is a sectional plan view taken through line 33 of FIG. 1 showing the pilot ring after floating radially to compensate for the side seam of a can body, were the can body of FIG. 1 located in the forming area of the die assembly of that Figure.
  • FIGS. 4-9 are enlarged fragmentary sectional views showing successive stages wherein one wall of the can body of FIG. 1 is being necked-in by a corresponding sectioned side of the die assembly of that Figure.
  • FIG. 4 shows the can body after entering the mouth of the outer reducing die.
  • FIG. 5 shows the marginal edge portion of the can body directed inwardly by the outer reducing die and engaging the step of the inner pilot ring.
  • FIG. 6 shows a portion of the marginal edge of the can body in groove G and transversely engaging the control surface of the retaining ring means.
  • FIG. 7 shows a rim of reduced diameter formed between the outer reducing die, control surface and pilot ring step.
  • FIG. 8 shows the can body wall being directed to lay against the smaller diameter portions of the inner die pilotring.
  • FIG. 9 shows the can body wall after it has been necked-in.
  • FIG. 1 shows a die assembly generally designated 10 and, aligned therewith, a tubular can body generally designated C.
  • Die assembly 10 is comprised of an outer reducing die 12, often called a punch, and to the interior thereof, an inner die pilot generally designated 14.
  • Outer reducing die 12 has a chamber 16 having at its mouth an inwardly-angled orienting surface 18, a guiding surface 20 which can be substantially vertical and/or slightly inwardly-angled, a recessed, more inwardly-angled directing surface 22 and a rim-forming surface 24.
  • Inner die pilot 14 telescoped within outer reducing die 12 is comprised of suitable mounting means, which can include means such as T-shaped holder 26, shaft 28 and means such as an Allen head cap screw 30 for fastening holder 26 to shaft 28.
  • pilot ring 32 Mounted on T-shaped holder 26 for axial movement thereon is pilot ring 32, axially floating retaining ring means 42, spring means 46 and spring support means 48. Pilot ring 32 is in turn mounted for radial floatation upon and within retaining ring means 42 biased from the interior of inner die pilot 14 by spring means 46.
  • Spring means 46 preferably is comprised of conical washers but can also be other suitable spring means such as coil springs.
  • Spring support means 48 preferably is adjustingly secured to holder 26 as by threads 50, but can also be a solid extension of T-shaped holder 26.
  • Pilot ring 32 has an orienting surface 34, and resisting surfaces including a substantially vertical supporting surface 36, an inwardly-angled step-joining supporting surface 38 and a wide diameter step 40.
  • Pilot ring. 32 is constructed of a dimension that leaves a gap between it and retaining ring means 42, and a gap between pilot step 40 and outer reducing die rim-forming surface 24, the area of the two gaps being sufficient to allow the marginal edge portion of can body C to fit fairly snugly and restrainingly between pilot step 40 and reducing die rim-forming surface 24.
  • the total width of the gap allows pilot ring 32 to float radially and thereby compensate for and accomodate the double metal thickness of can side seam SS.
  • pilot ring supporting surfaces 38 and 36 and outer reducing die 12 provides enough clearance for a can body wall which has been directed inwardly ofi of inwardly-angled reducing die directing surface 22, to flow inwardly and form a wave whose crest rests or lays against pilot ring surfaces 38 and 36 in a manner to be more fully explained later.
  • Retaining ring means 42 can be one piece but preferably is comprised of several pieces tied together and axially moveable as a unit as shown in FIG. 1. Shown therein is retaining ring means 42 which can be moderately L-shaped so that its lower leg extends to the vertical plane of and has a configuration similar to that of pilot ring support surface 36 and orienting surface 34.
  • Retaining ring means 42 can include control ring 43 having a control surface 44 positioned adjacent to and protruding slightly beyond pilot ring step 40, and means such as nut 45 for adjustably holding control ring 43 in place and for maintaining a suitable uniform radial gap between control ring 43 and pilot ring 32 which will allow the pilot ring to float radially.
  • control surface 44 protrudes beyond step 40 is a distance that will enable surface 44 to transversely engage the edge of a can body wall brought into groove G formed by pilot ring step 40, control surface 44 and reducing die rim-forming surface 24.
  • control surface 44 is utilized to essentially prevent relative movement between the can body and the surfaces of pilot ring 32 by transversely engaging the can body edge and causing pilot ring 32 and retaining ring means 42 to move as a unit as the can body moves and to float axially against or with the'bias of spring means 46.
  • the distance that retaining ring means 42 and pilot ring 32 float axially and the amount of compressive force exerted on the can body wall can be controlled by controlling the amount of tension or pressure exerted by spring means 46. Less axial movement and greater pressure can be obtained by lowering spring support means 48 toward retaining ring means 42.
  • retaining ring control means such as shoulder screws 52 (only one shown) which can, for one thing, prevent inward axial movement beyond a certain preset distance.
  • Shoulder screws 52 have threaded ends which engage retaining ring means 42 on an interior side of a portion of a T-shaped holder leg, and screw heads 53 which have undersurfaces parallel to but removed or gapped from opposing stopping surfaces on the exterior side of the aforementioned portion of holder 26.
  • a shim 54 of a thickness which establishes the desired distance can be employed.
  • FIG. 2 is a side view of tubular can body C of FIG. 1, here designated C, after it has been necked-in with the die assembly of FIG. 1.
  • Necked-in can body C is shown having a rim R, an intermediary surface r, a neck N and a shoulder Sh respectively having the configuration of pilot ring step 40, step-joining supporting surface 38 and supporting surface 36.
  • FIG. 3 is a top sectional view as would'be taken along line 3-3 of FIG. 1 were straight-walled can body C of FIG. 1 to have entered groove G of die assembly 10.
  • FIG. 3 shows that when can body C, having side seam SS, enters groove G, pilot ring 32 floats radially (to the right in FIG. 3) to compensate for the double metal thickness of the side seam.
  • FIGS. 4 through 9 show the manner in which straightwalled can body C is necked-in with die assembly 10.
  • the Figures show what is occuring at various stages during the necking-in operation and does not necessarily show that the operation stops at each stage. Preferably the operation is continuous.
  • the'can body, the outer reducing die, the inner die pilot or any combination or combinations thereof may be moved to effect the relative movement between die assembly and can body C that is required to neck-in the can body.
  • FIGS. 4-9 show the preferred method of effecting the opposing necking-in operation, that is, wherein relative movement is effected by holding can body C stationary and moving die assembly 10 telescopingly into engagement with can body C.
  • any conventional means can be used for holding the can body steady.
  • the die assemblies When only one end of the can is being necked-in, the die assemblies are brought into telescoping relationship with that end while for example a cupshaped base applies an axially and radially restraining force on the opposite end of the can body.
  • the die assembly When both ends are being necked-in, the die assembly is brought into telescoping relationship with each end while the can is held for example by magnets lining the arcuate surface of can body-shaped cutouts or pockets in for example the flanges of a starwheel or turret.
  • Any suitable conventional means for insertingly and retractingly moving the die assembly outer reducing die 12 and inner die pilot 14 in independent cooperating relationship can be used, such means being well known in the industry.
  • FIG. 4 shows outer reducing die 12 and innerdie pilot ring 32 in telescoped relationship and together moved into telescoping relationship with stationary can body C whereby outer reducing die 12 has moved over the mouth of body C and has thereby caused the marginal edge portion thereof to be movingly engaged with the lower substantially vertical portion of rim-forming surface 20.
  • FIG. 4 also shows the previously mentioned groove G.
  • reducing die 12 and inner die piot ring 32 in the same telescoped relationship as in FIG. 4, have together moved further downwardly over stationary can body C thereby causing its can body wall to progressively engagingly travel along and flowingly adopt the contour first of the lower substantially vertical and then the upper slightly inwardly-angled portion of guiding surface 20, and then that of the more inwardlyangled directing surface 22, the latter of which reduces the diameter of the can body and directs the flow of can body metal toward and against the large diameter of pilot ring step 40.
  • pilot ring 40 floats from the phantom line radially to the right where it is shown in FIG. 5, to compensate for the double thickness of side seam SS.
  • the can body edge can be directed to initially strike any portion of step 40, it is desirable that it strike an upper portion thereof.
  • the upper portion is sufficiently removed from control surface 44 to allow for elongation of the can body when its diameter is reduced by inwardly-directing surface 22.
  • reducing die 12 can dwell, but preferably it continues moving downward over the can body.
  • pilot step 40 As the edge of 5 can body strikes pilot step 40, travels into groove G and transversely engages control surface 44, pilot ring 32 and retaining ring means 42 move axially upwardly as a unit to load, i.e. compress, conical washer spring means 46 (shown in FIG. 1).
  • groove G elongates and more of the marginal edge portion of the can body is brought into and is abuttingly engaged with rimforming surface 24, control surface 44 and wide diameter step 40.
  • the marginal edge portion has been formed into a rim R having a reduced diameter, the rim being contained or restrained in and by the surfaces making up groove G.
  • reducing die 12 continues to move downwardly over stationary can body C.
  • inwardly-angled directing surface 22 continues to direct the flow of can body wall metal progressively inwardly and downwardly against and along the perimeter of pilot ring 32 below the wide diameter of step 40, namely, along the reduced diameters of inwardlyangled step-joining supporting surface 38. This action further reduces the diameter of and thereby gradually necks in the can body.
  • reducing the diameter of the lower portions of pilot ring 32 pro vides a clearance for and allows the inwardly-directed metal to continue flowing on its path away from reducing die rim-forming surface 24 so that surface 24 does not rub against or in any way touch the outside can body wall portions that form the neck in the can body.
  • the inwardly flowing metal is not compressed against but forms a wave of wall material whose crest is spatially radially-inwardly and axially offset from the radially innermost edge of directing surface 22, between bent shoulder Sh and rim R.
  • the wave is moved through the aforementioned clearance and its crest is merely gradually flowingly directed to gently rest or lay against the lower reduced diameter portions of pilot ring 32.
  • FIG. 9 shows the finished necked-in can body C having neck N, no part of its outer surface having come into contact with or being in contact with the length of reducing die rim-forming surface 24.
  • reducing die 12 has approximately completed its downward stroke and has formed a shoulder Sh in can body C.
  • inner die pilot 14 After completion of its downward stroke, inner die pilot 14 preferably remains stationary while reducing die 12 is retracted from telescoping engagement with can body C leaving its rim R fitting fairly snugly around wide diameter pilot ring step 40, and its intermediary portion r and neck N resting fairly loosely around the lower portions of pilot ring 32. Because the narrow rim R is the only portion that has been frictionally compressed into fairly snug engagement, very little pressure is required to strip a necked-in can form inner die pilot 14. Usually, pressure from one finger of the hand is sufficient when only one end has been neckedin. When both ends are necked-in about 4' lbs maximum per end is required. This is to be compared with conventional die assemblies which often require up to 40 lbs per end when both ends are necked-in.
  • spring means 46 functions throughout the necking-in operation. Although its full function is perhaps not clearly understood, it is believed to be as stated herein. Before can body C strikes some portion of pilot ring 32 and thereafter transversely engages control ring surface 44, and pilot ring 32 move axially upward against and thereby compress conical washers 46. Any elongation of the can body wall due to reduction in diameter by inwardly-directing surface 22 and possibly due to the pressing of metal in groove G, also aids in the compression of conical washers 46. As outer reducing die 12 continues downward over the can body wall and stationary die pilot 32, the can body wall metal is directed to lay against the smaller diameters of pilot support surfaces 38 and 36.
  • conical washers 46 decompress to compensate for the shortening of the body wall. As more fully explained later, this decompression is also believed to aid in the initial bending and in the directing and the laying of the can body metal inwardly against and along pilot ring supporting surfaces 38 and 36. As outer reducing die 12 continues further downwardly, somewhere between the stages of FIGS. 8 and 9 the can body wall lengthens again and conical washers 46 compress to accomodate the change in length. This compression remains until it follows the can when the can is removed from die pilot 14. Thus, it can be seen that conical washer spring means 46 are actively compressing and decompressing throughout most if not all of the necking-in operation. By doing so, they enable the die pilot to accomodate and compensate for changes in body length occurring during the necking-in operation as well as for cans of irregular length.
  • the necked-in can bodies are essentially scratch and score free in their overall necked-in surface areas, especially those surfaces not double seamed to an end closure.
  • the overall necked-in can surface area just referred to is intended to include rim-adjoining surface r, neck N and shoulder Sh).
  • the length of the marginal edge portion of can body C diameter that is initially reduced is shorter or less than that reduced in conventional die necking-in operations.
  • the length reduced is only that which extends up to the opposing wide diameter surface of pilot ring step 40.
  • Both of these facts means less bunching of metal around and adjacent the circumference of the open end of the can body. Less bunching means less wrinkles when the cans are necked-in. It also means substantially less wrinkles and cracks than usually occur during flanging operations because the metal of the large diameter rim R need not be bent and stretched as far outwardly as usual to form a satisfactory flange. Less wrinkles and cracks result in a lower incidence of can leakage.
  • die assembly 10 compensates for irregularities in can bodies that are to be necked-in.
  • its spring means allows it to accomodate irregularities in can length due to a mislap of a side seam, and the clearance provided between its rim-forming surface 24 and pilot ring supporting surface 38 and 36 permits scratch-free necking-in despite portions of can body walls being irregularly thick due to accumulations of for example solder or enamel.
  • Tubular members can be constructed of any material which can be directed to flow in the manner required ofthis invention, and which can be necked-in in accordance with this invention.
  • metal cans can for example be made of tinplate, tin free steel or aluminum, and may have or not have any of the various hooked, soldered or thermoplastically adhered or other type side seams.
  • Materials and can bodies of varying strengths can be necked-in by controlling pressure, for example by-varying the amount of pressure exerted by conical washers 46. This can be done by raising or lowering adjustable spring support means 48 and thereby respectively applying less or more pressure upon the conical washers.
  • the die assembly of this invention has been found especially suitable for necking-in cans made of light weight low strength materials such as aluminum because die assembly 10 does not tend to cause such materials to collapse.
  • conventional outer reducing dies usually operate on an amount of pressure required to force metal to bend around forming surfaces and to compress and rub metal into and along narrow snug areas
  • reducing die 10 for the most part only requires pressure sufficient to direct already flowing material which flows through a clearance and rests on the supporting surfaces of pilot ring 32. Also, little pressure is required with die assembly 10 because, as previously mentioned, little pressing and friction of metal takes place.
  • the method of necking-in a tubular member in accordance with this invention basically involves bending the marginal edge portion of the tubular member inwardly to initially reduce its diameter to a first diameter, applying a restraining force to an end portion of the inwardly bent marginal edge portion to form a rim out of the restrained end portion, applying an exterior force to the initially inwardly bent marginal edge portion, the force being sufficient to direct the wall of the tubular member to flow further inwardly than the diameter of the rim to obtain a wall having a second diameter smaller than the initial diameter, and moving the exterior force axially along and through a length of the tubular wall so that the directing of the wall inwardly continues to occur throughout that length and thereby forms a neck having the second diameter.
  • an axial force is applied to both ends of the tubular member to hold the tubular member steady while the rest of the aforementioned steps are being carried out.
  • a method of forming a neck in a tubular member which comprises the steps of:
  • a method of necking-in an end portion of a tubular member comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00231207A 1972-03-02 1972-03-02 Method and apparatus for necking-in tubular members Expired - Lifetime US3771476A (en)

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JP (1) JPS5633169B2 (US06346242-20020212-C00066.png)
AU (1) AU463816B2 (US06346242-20020212-C00066.png)
CA (1) CA977215A (US06346242-20020212-C00066.png)
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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4446714A (en) * 1982-02-08 1984-05-08 Cvacho Daniel S Methods of necking-in and flanging tubular can bodies
US4457158A (en) * 1983-01-28 1984-07-03 Ball Corporation Method and apparatus for necking can bodies
US5711178A (en) * 1995-06-26 1998-01-27 Hoogovens Staal Bv Die for use in die-necking of a metal can body and method using such a die
US6032502A (en) * 1998-08-31 2000-03-07 American National Can Co. Apparatus and method for necking containers
US6253597B1 (en) * 1988-02-19 2001-07-03 Corus Staal B.V. Body-necking a wall-ironed can
US20100276522A1 (en) * 2009-05-01 2010-11-04 Dl Technology Material dispense tips and methods for forming the same
CN102139287A (zh) * 2010-11-19 2011-08-03 无锡曙光模具有限公司 用于管件管身缩颈加工的冲压模具
US8480015B1 (en) 1999-01-26 2013-07-09 Dl Technology, Llc Fluid dispense tips
US8690084B1 (en) 2000-01-26 2014-04-08 Dl Technology Llc Fluid dispense tips
US8707559B1 (en) * 2007-02-20 2014-04-29 Dl Technology, Llc Material dispense tips and methods for manufacturing the same
US9358604B2 (en) 2014-06-12 2016-06-07 Ball Corporation System for compression relief shaping
CN109228532A (zh) * 2018-09-20 2019-01-18 浙江森盟包装有限公司 圆形纸盖成型设备的压边装置
CN109228533A (zh) * 2018-09-20 2019-01-18 浙江森盟包装有限公司 圆形纸盖成型设备
US11370596B1 (en) 2012-02-24 2022-06-28 DL Technology, LLC. Micro-volume dispense pump systems and methods
US11746656B1 (en) 2019-05-13 2023-09-05 DL Technology, LLC. Micro-volume dispense pump systems and methods

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JPS5841311U (ja) * 1981-09-11 1983-03-18 東洋製罐株式会社 ネックイン缶胴体
IE60104B1 (en) * 1987-05-04 1994-06-01 Barrett James Fintan Process and apparatus for manufacturing pipe fittings

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US1698999A (en) * 1927-01-24 1929-01-15 American Can Co Necking-in or reforming tubular bodies
US2506657A (en) * 1947-06-04 1950-05-09 Webster Corp Formation of tube ends
US2800344A (en) * 1953-12-16 1957-07-23 Penn Aircraft Products Inc Connectors for metal tubing of different materials
US3428010A (en) * 1967-02-03 1969-02-18 Continental Can Co Method of making a metallic can and cover
US3600927A (en) * 1968-12-30 1971-08-24 Continental Can Co Necking die with floating center post
US3581542A (en) * 1969-02-03 1971-06-01 Continental Can Co Apparatus for and method of necking in end portions of tubular members

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4446714A (en) * 1982-02-08 1984-05-08 Cvacho Daniel S Methods of necking-in and flanging tubular can bodies
US4457158A (en) * 1983-01-28 1984-07-03 Ball Corporation Method and apparatus for necking can bodies
US6253597B1 (en) * 1988-02-19 2001-07-03 Corus Staal B.V. Body-necking a wall-ironed can
US5711178A (en) * 1995-06-26 1998-01-27 Hoogovens Staal Bv Die for use in die-necking of a metal can body and method using such a die
US6032502A (en) * 1998-08-31 2000-03-07 American National Can Co. Apparatus and method for necking containers
US9833807B2 (en) 1999-01-26 2017-12-05 DL Technology, LLC. Fluid dispense tips
US9180482B1 (en) 1999-01-26 2015-11-10 DL Technology, LLC. Fluid dispense tips
US8480015B1 (en) 1999-01-26 2013-07-09 Dl Technology, Llc Fluid dispense tips
US9573156B1 (en) 2000-01-26 2017-02-21 Dl Technology, Llc Fluid dispense tips
US8690084B1 (en) 2000-01-26 2014-04-08 Dl Technology Llc Fluid dispense tips
US9242770B2 (en) 2000-01-26 2016-01-26 Dl Technology, Llc Fluid dispense tips
US11292025B1 (en) 2007-02-20 2022-04-05 DL Technology, LLC. Material dispense tips and methods for manufacturing the same
US8707559B1 (en) * 2007-02-20 2014-04-29 Dl Technology, Llc Material dispense tips and methods for manufacturing the same
US9486830B1 (en) 2007-02-20 2016-11-08 DL Technology, LLC. Method for manufacturing a material dispense tip
US12017247B1 (en) 2007-02-20 2024-06-25 DL Technology, LLC. Material dispense tips
US11648581B1 (en) 2007-02-20 2023-05-16 DL Technology, LLC. Method for manufacturing a material dispense tip
US10583454B1 (en) 2007-02-20 2020-03-10 Dl Technology, Llc Material dispense tip
US8864055B2 (en) 2009-05-01 2014-10-21 Dl Technology, Llc Material dispense tips and methods for forming the same
US9272303B1 (en) 2009-05-01 2016-03-01 Dl Technology, Llc Material dispense tips and methods for forming the same
US11738364B1 (en) 2009-05-01 2023-08-29 DL Technology, LLC. Material dispense tips and methods for forming the same
US20100276522A1 (en) * 2009-05-01 2010-11-04 Dl Technology Material dispense tips and methods for forming the same
US10105729B1 (en) 2009-05-01 2018-10-23 DL Technology, LLC. Material dispense tips and methods for forming the same
US11420225B1 (en) 2009-05-01 2022-08-23 DL Technology, LLC. Material dispense tips and methods for forming the same
US10722914B1 (en) 2009-05-01 2020-07-28 DL Technology, LLC. Material dispense tips and methods for forming the same
CN102139287B (zh) * 2010-11-19 2013-03-06 无锡曙光模具有限公司 用于管件管身缩颈加工的冲压模具
CN102139287A (zh) * 2010-11-19 2011-08-03 无锡曙光模具有限公司 用于管件管身缩颈加工的冲压模具
US11370596B1 (en) 2012-02-24 2022-06-28 DL Technology, LLC. Micro-volume dispense pump systems and methods
US9358604B2 (en) 2014-06-12 2016-06-07 Ball Corporation System for compression relief shaping
CN109228533A (zh) * 2018-09-20 2019-01-18 浙江森盟包装有限公司 圆形纸盖成型设备
CN109228532A (zh) * 2018-09-20 2019-01-18 浙江森盟包装有限公司 圆形纸盖成型设备的压边装置
US11746656B1 (en) 2019-05-13 2023-09-05 DL Technology, LLC. Micro-volume dispense pump systems and methods

Also Published As

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CA977215A (en) 1975-11-04
AU463816B2 (en) 1975-08-07
AU5327173A (en) 1974-09-19
IT988110B (it) 1975-04-10
GB1419007A (en) 1975-12-24
JPS48100289A (US06346242-20020212-C00066.png) 1973-12-18
JPS5633169B2 (US06346242-20020212-C00066.png) 1981-08-01

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