US3793706A - Method for seizing, and holding for transfer of small objects, particularly coiled filaments for electrical lamps and the like - Google Patents

Method for seizing, and holding for transfer of small objects, particularly coiled filaments for electrical lamps and the like Download PDF

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Publication number
US3793706A
US3793706A US00218112A US3793706DA US3793706A US 3793706 A US3793706 A US 3793706A US 00218112 A US00218112 A US 00218112A US 3793706D A US3793706D A US 3793706DA US 3793706 A US3793706 A US 3793706A
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US
United States
Prior art keywords
belt
filaments
coils
curvature
over
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
US00218112A
Other languages
English (en)
Inventor
K Dohlen
J Lukas
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Application granted granted Critical
Publication of US3793706A publication Critical patent/US3793706A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/46—Machines having sequentially arranged operating stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0096—Transport of discharge tube components during manufacture, e.g. wires, coils, lamps, contacts, etc.
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0096—Transport of discharge tube components during manufacture, e.g. wires, coils, lamps, contacts, etc.
    • H01J2893/0097—Incandescent wires of coils
    • 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
    • Y10S269/00—Work holders
    • Y10S269/903—Work holder for electrical circuit assemblages or wiring systems
    • 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
    • Y10T29/4981—Utilizing transitory attached element or associated separate material
    • 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
    • Y10T29/49998—Work holding

Definitions

  • PATENTEUFEBZB I874 SHEET 2 OF 3 .OOOOOOOOONVNVO NNNNNNNN A NNNNNNNNNNN PATENTEUFEBZSISM V 3,793,706
  • the present invention relates to a method to seize, hold, and subsequently to transfer for treatment of small objects, and particularly coiled wire filaments for use in electrical incandescent lamps, electrodes of discharge lamps, and the like, which filaments are made after a production step which may include cutting off of filamentary items for individual lamps after having been made from a long continuous wire.
  • the invention additionally relates to an apparatus capable of carrying out the method, and in which the filaments are individually seized, stored and packed in such a manner that they can be chemically treated.
  • the invention will be described in general with respect to filament coils for incandescent lamps, fluorescent lamps, and the like, and indeed was developed due to particular problems associated with the manufacture of such filaments, although it is applicable also to other small objects.
  • wire filaments for electrical lamps are made, the filaments are coiled about themselves and additionally coiled about a mandrel so that they can then be cut to size.
  • the individual filaments, in cut length, around the mandrel are immersed in a suitable acid bath to dissolve the coil mandrel. Customarily this dissolution step has been carried out while the filaments are loose in a container.
  • the acid dissolution bath for the mandrel is circulated in the chemical treatment vessel. Due to agitation and the circulating fluid,
  • the filaments become entangled.
  • the entangled ball of filaments is fed to a separating device.
  • the coils are then applied to an assembly or mounting machine.
  • the considerable entanglement of the coils arising in the acid treatment bath interferes with separation, which disturbs normal production flow and permits damaged or not completely separated coils to be transported to the assembly station, which requires that they are separately sorted out. This is often done manually.
  • the overall consumption of filament material is considerably increased due to the presence of damaged coils being supplied after separation, and the inability to separatesome coils at all.
  • the belts are not suited to accept coils after having been cut, since the coils are retained in the belt in such a manner that they cannot, thereafter, be treated with a treatment fluid, such as an acid bath to etch out the mandrel.
  • a treatment fluid such as an acid bath to etch out the mandrel.
  • the coils are retained in small compartments which are dust-tight, so that the core or mandrel over which the coils are wound cannot thereafter be dissolved out.
  • the type of belt disclosed which encloses the coils all over makes it difficult to optically or visually check and inspect the cut coils.
  • a belt is provided, preferably of transparent polyethylene or the like, for example of 50 p. thickness, which has slots cut therein which leave, in the belt, at least two projecting portions which have directions of projection, one in the direction of transport of the belt and the other oppositely thereto.
  • the projecting portions are connected with the belt at a base region remote from the projecting ends, which extend substantially transversely to the direction of transport.
  • the belt is guided over an edge, typically a surface having a radius of curvature which is not more than half the distance between the connecting regions of the oppositely directed projections to the belt.
  • the projections are deflected from their position which is essentially flat or plan with respect to the surface of the belt to an unstanding position where they will form upstanding flaps.
  • the objects typically the filament
  • the objects are introduced singly into the space between the oppositely directed projections, for example by being dropped through a wheel having notches or separating grooves at the circumference thereof, into which the cut elements are dropped as they are being cut.
  • the belt is then guided over an essentially straight surface so that the flaps will close over the objects, typically the filaments.
  • the filaments are thus contacted only at selected surface portions thereof and the belt can be rolled over a substantially greater radius of curvature than the sharp edge and, with the filaments therein immersed in a dissolving bath so that the mandrels or cores for the filaments can be chemically dissolved out.
  • the excellent chemicalresistance of polyethylene makes it a particularly suitable material for the belt, which can be reused.
  • the belts can be directed to a filament feeding and insertion machine, thus facilitating the subsequent assembly of the filaments to the stems of a lamp press.
  • the filament coils thus are held in the belt in such a manner that they can be essentially completely con.- tacted by dissolving acid, the filamentary coils being separated so that they cannot hook into each other or become entangled.
  • an optical test apparatus such as binocular microscopes, ground glass projectors, photoelectric scanning apparatus or the like can readily be placed along the transport path, before and/or after the core has been etched out, the transparent belt permitting visual or optical inspection.
  • FIG. 1 is a schematic side view of the apparatus, and illustrating the process
  • FIG. 2 is a top view of a belt utilized in the process
  • FIG. 3 is an enlarged fragmentary side view illustrating the placement of filaments in the belt.
  • a continuous twist of filamentary material, wrapped around a mandrel and together schematically illustrated at 1 is cut into small length, for insertion in lamps, by a knife 3, the cutting operation itself being controlled by a cut control apparatus (which may be magnetic) schematically illustrated at 2.
  • the knife and cutter control apparatus are well known in the art and need not be described in detail.
  • the cut coils, with the core or mandrel portion inside is dropped on wheel 5 which rotates in the direction of the arrow.
  • Wheel 5 has grooves or notches 6 formed on the circumference thereof.
  • the cut filaments, schematically illustrated at 4 will thus be transported, one at a time, by wheel 5. Operations of the cutter 3'and the wheel 5 are synchronized, as well known.
  • the wheel 5 rotates in a housing 7 which closely surrounds the wheel, to prevent the coils 4 from falling out. At the bottom, the housing is formed with a slit 8 which releases, singly, the cut coils 4.
  • a belt 9 (FIG. 2) is located beneath the slit 8.
  • Belt 9, at its sides, has transport perforations 10 which are engaged by transport sprockets, as well known.
  • the central portion of the belt has severing lines in the shape of a Z punched therein, as illustrated in three rows.
  • the Z-shaped punches 11 provide two projecting portions, one portion 11a extending in the direction of transport, as indicated by-arrow A, and the other projecting portion, 11b, extending in the opposite direction.
  • the portions included by the acute angle formed by the Z thus will form a pair of flaps 15, 16.
  • the belt is made of a plastic foil material which is resistant to acids and bases; typically it is polyethylene, about 50 p. thick.
  • the single, separated filaments are placed on the belt, and held thereby as best seen in the detail view of FIG. 3.
  • Belt 9 is guided from a pay-out roll 12 (FIG. 1) over a guide roller 13 and then over a guide surface bar 14 (FIG. 3) which has, at its tip, a curvature of such diameter, or distance, that the counter-directed flaps l5, 16 will stand up, and become erect as the belt is guided over the edge of member 14 (see FIG. 3).
  • slit 8 FIG. I
  • synchronized feed of the belt and the wheel 5 will present a notch 6, filled with a cut filament 4 which will drop, by gravity,'into the space between the flaps.
  • the filament is long enough to span the width of the belt, and is to be held, a plurality of rows can be formed on the belt, three being shown on FIG. 2.
  • the belt can also be made wider, and a plurality of filaments aligned in rows on the belt, fed from drums formed with compartmented notches or grooves.
  • the spool center or core is also made of a plastic material which is acid and base resistant, such as PVC.
  • the spool on which the belt is to be wound is so dimensioned that .it may serve as carrier for the belt holding the filaments during the dissolution step during which the core is dissolved out.
  • the completed spool, with belt, is introduced into an acid bath B (FIG. 1).
  • the acid can be circulated, or agitated, as
  • the liquid has access to the filaments held in the belt from all sides, yet entanglement of the individual filaments is prevented.
  • the belt with the filaments thereon is washed in order to remove remnants of the dissolving acid bath, and then dried with warm or hot air.
  • the spool, together with the belt and the now hollow filamentary coils is taken to the mounting apparatus for the lamp press, where the belt is unwound and the filaments are inserted in a conventional coil board or are directly inserted, for example by a vacuum gripper to the pinch apparatus for the leads, for pinch-sealing the filament.
  • the coils can be taken, singly, directly from the belts.
  • the belt filled with the coils is guided once more over a surface which opens the flaps, that is, a surface similar to element 14 (FIG. 3).
  • the now empty belt can be respooled on a supply reel 12 for re-use.
  • Optical or visual inspection can be carried out at any desired point I in the process.
  • the belt on wind-up reel 18 can be separately re-spooled to another coil for inspection, which enhances the versatility of the apparatus and the method since inspection can be carried out, singly and on the separated coils, the belt on the spool permitting ready transport. Coupled with the inspection, a test step can be carried out and defective coils removed, on their position marked so they will not be inserted into clamps at a later insertion stage.
  • the cut for projecting portions need not be Z- shaped, but can be trapezoidal, V-shaped, without lateral interconnection; the Z-shaped cuts being a special and particularly simple form of a pair of connected V- shaped projections.
  • Method of seizing, treating in a solvent bath, holding for transfer, and releasing small filamentary coils for lamp filaments comprising providing a transparent foil forming a transport belt essentially inert with respect to the solvent bath and having cuts which define at least two projecting portions, one having a direction of projection in the direction of transport of the belt and the other having a direction of projection opposite the transport direction, the projecting portions being connected with the belt at a region remote from said projections and extending substantially transverse to the direction of transport;
  • step of guiding the belt over a surface having a sharp radius of curvature comprises guiding the belt over a surface having a radius of curvature which is up to about half of the distance of the connecting regions of a pair of oppositely directed projecting portions.
  • step of guiding the belt over a surface having a sharp radius of curvature comprises guiding the belt over a surface having a radius of curvature which is up to about half of the distance of the connecting regions of a pair of oppositely directed projecting portions.
  • Patent Ireuhand-Gesellschaft f'dr Assignee:

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Package Frames And Binding Bands (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
US00218112A 1971-02-05 1972-01-17 Method for seizing, and holding for transfer of small objects, particularly coiled filaments for electrical lamps and the like Expired - Lifetime US3793706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712105517 DE2105517A1 (de) 1971-02-05 1971-02-05 Verfahren und Vorrichtung zum Aufbewahren, Befördern und Behandeln von Drahtwendeln

Publications (1)

Publication Number Publication Date
US3793706A true US3793706A (en) 1974-02-26

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ID=5797931

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US00218112A Expired - Lifetime US3793706A (en) 1971-02-05 1972-01-17 Method for seizing, and holding for transfer of small objects, particularly coiled filaments for electrical lamps and the like

Country Status (11)

Country Link
US (1) US3793706A (enExample)
AT (1) AT308900B (enExample)
BE (1) BE778619A (enExample)
CH (1) CH541867A (enExample)
DE (1) DE2105517A1 (enExample)
ES (1) ES398065A1 (enExample)
FR (1) FR2124507B1 (enExample)
GB (1) GB1349608A (enExample)
IT (1) IT943352B (enExample)
NL (1) NL7201400A (enExample)
SE (1) SE383628B (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071944A (en) * 1975-10-20 1978-02-07 Western Electric Co., Inc. Adhesively and magnetically holding an article
US4271579A (en) * 1978-02-02 1981-06-09 Charles E. Green & Son, Inc. Paint roller cage assembly apparatus and method
US6295712B1 (en) * 1996-07-15 2001-10-02 Shturman Cardiology Systems, Inc. Rotational atherectomy device
US20040245068A1 (en) * 2003-03-06 2004-12-09 G.D. Societa' Per Azioni Turn-around device for packets
CN109262353A (zh) * 2018-11-20 2019-01-25 湖北理工学院 一种数控车床自动化上下料装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108002013B (zh) * 2017-12-22 2024-05-24 宜宾丝丽雅股份有限公司 一种粘胶长丝投料装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB471746A (en) * 1936-03-09 1937-09-09 Anglo Pencil Company Ltd Improvements in devices for carrying and displaying articles such as pencils or the like and in the production thereof
US2280573A (en) * 1938-11-16 1942-04-21 Gen Electric Filament transporting method and apparatus
GB753518A (en) * 1952-11-11 1956-07-25 Philips Nv Improvements in or relating to work handling systems comprising a conveyor band
US2988199A (en) * 1958-12-01 1961-06-13 American Mach & Foundry Cigarete turn around device
US3110098A (en) * 1960-11-25 1963-11-12 Sylvania Electric Prod Manufacture of wire coils
US3120892A (en) * 1959-12-04 1964-02-11 Arenco Ab Conveyor
US3171535A (en) * 1962-01-12 1965-03-02 Western Electric Co Belt conveyor for transporting electrical components

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133637A (en) * 1961-12-14 1964-05-19 Lawrence D Siegler Means for packaging small articles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB471746A (en) * 1936-03-09 1937-09-09 Anglo Pencil Company Ltd Improvements in devices for carrying and displaying articles such as pencils or the like and in the production thereof
US2280573A (en) * 1938-11-16 1942-04-21 Gen Electric Filament transporting method and apparatus
US2372072A (en) * 1938-11-16 1945-03-20 Gen Electric Filament storage apparatus
GB753518A (en) * 1952-11-11 1956-07-25 Philips Nv Improvements in or relating to work handling systems comprising a conveyor band
US2988199A (en) * 1958-12-01 1961-06-13 American Mach & Foundry Cigarete turn around device
US3120892A (en) * 1959-12-04 1964-02-11 Arenco Ab Conveyor
US3110098A (en) * 1960-11-25 1963-11-12 Sylvania Electric Prod Manufacture of wire coils
US3171535A (en) * 1962-01-12 1965-03-02 Western Electric Co Belt conveyor for transporting electrical components

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071944A (en) * 1975-10-20 1978-02-07 Western Electric Co., Inc. Adhesively and magnetically holding an article
US4271579A (en) * 1978-02-02 1981-06-09 Charles E. Green & Son, Inc. Paint roller cage assembly apparatus and method
US6295712B1 (en) * 1996-07-15 2001-10-02 Shturman Cardiology Systems, Inc. Rotational atherectomy device
US20040245068A1 (en) * 2003-03-06 2004-12-09 G.D. Societa' Per Azioni Turn-around device for packets
US7128205B2 (en) * 2003-03-06 2006-10-31 G.D Societa Per Azioni Turn-around device for packets
CN109262353A (zh) * 2018-11-20 2019-01-25 湖北理工学院 一种数控车床自动化上下料装置

Also Published As

Publication number Publication date
FR2124507A1 (enExample) 1972-09-22
SE383628B (sv) 1976-03-22
CH541867A (de) 1973-09-15
AT308900B (de) 1973-07-25
IT943352B (it) 1973-04-02
BE778619A (fr) 1972-05-16
ES398065A1 (es) 1974-07-01
FR2124507B1 (enExample) 1975-08-29
NL7201400A (enExample) 1972-08-08
GB1349608A (en) 1974-04-10
DE2105517A1 (de) 1972-08-17

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