US3741140A - Pattern controlled feed mechanism - Google Patents

Pattern controlled feed mechanism Download PDF

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Publication number
US3741140A
US3741140A US00238034A US3741140DA US3741140A US 3741140 A US3741140 A US 3741140A US 00238034 A US00238034 A US 00238034A US 3741140D A US3741140D A US 3741140DA US 3741140 A US3741140 A US 3741140A
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US
United States
Prior art keywords
cam
machine
feed mechanism
bed
work pieces
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
US00238034A
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English (en)
Inventor
W Mercaldi
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.)
Emhart Industries Inc
Original Assignee
USM Corp
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 USM Corp filed Critical USM Corp
Application granted granted Critical
Publication of US3741140A publication Critical patent/US3741140A/en
Assigned to EMHART ENTERPRISES CORP. reassignment EMHART ENTERPRISES CORP. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: MAY 8, 1987 Assignors: USM CORPORATION
Assigned to EMHART INDUSTRIES, INC. reassignment EMHART INDUSTRIES, INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: EMHART ENTERPRISES CORP., A NJ CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B21/00—Sewing machines with devices for automatically controlling movement of work-carrier relative to stitch-forming mechanism in order to obtain particular configuration of seam, e.g. programme-controlled for sewing collars, for attaching pockets
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices

Definitions

  • ABSTRACT For stitching along a curve and/or rectilinearly a sewing machine (or the like) includes in its bed, in lieu of conventional feed dog mechanism or the like, a cam of desired interchangeable pattern serving also as a work hold-down, and feed mechanism for progressing the work and cam relative to the operating zone of a conventionally reciprocable needle.
  • the feed mechanism desirably comprises a pair of idler rolls engageable with one side, for example the exterior of the cam, and a drive roll engageable with the opposite or interior side of the cam and biased toward the idler rolls substantially between them.
  • Edge guidance and numerical control are examples, the latter being relatively costly and the former not always being dependable in view of the yieldable contour or profile of many limp materials when edge gaged.
  • a feature of the invention resides in the provision of an open or preferably hollow pattern cam of selected contour, the cam to serve as a work hold-down as the work is guided on a work supporting bed relative to a reciprocable tool such as a needle, and cam feeding mechanism for progressing the work relative to the operating zone of the needle.
  • the cam feeding mechanism preferably has frictional engagement with opposite upstanding wall portions of the cam at a locality adjacent to the needle.
  • a further feature of the invention relates to the provision, in a pattern controlled sewing machine, of mecha-. nism for separating a guide cam from its feed mechanism whereby at termination of a seam the work may be removed and a new work piece conveniently introduced.
  • FIG. 1 is a view in front elevation with portions broken away of a pattern following mechanism operable in conjunction with the head of a double needle sewing machine.
  • FIG. 2 is a section taken on the line II-II of FIG. 1.
  • FIG. 3 is a detail view in side elevation indicating work and cam guide mechanism shown in FIGS. 1 and 2, and
  • FIG. 4 is a plan view of mechanism for moving the cam guide mechanism heightwise.
  • a stationary sewing machine head generally designated 10 includes a vertically reciprocable needle bar 12 carrying, in this instance, a pair of needles 14,14.
  • the machine 10 may be devoid of conventional work feed dog mechanism, but includes a horizontal bed 16 for slidably supporting a pair of superimposed work pieces W,W (FIGS. 1,2) which, in this case are shown circular and are to be marginally sewed as by a concave convex double seam S (FIG. 2).
  • the work pieces may be of any desired shape and underlie, at least in part, a pattern or cam shaped guide rail 18 (FIGS. 1-3) which is of selected contour and preferably is hollow and rigid.
  • the selected pattern cam 18 has portions which are convex, concave and rectilinear.
  • the latter in this example, extend outside the edges of the work pieces thereby defining, in the exemplary product to be stitched, an inlet or neck area 20 into which filler material may be introduced to fill a pouch-like space between the plies afforded by the circular portion of the pattern.
  • application of the invention is not limited to any particular work piece material, nor is it necessarily restricted to use with a sewing machine since other mechanized forms of securement such as cementing, stapling, etc. may likewise be employed with the invention.
  • the drive roll 36 is disposed midway between a pair of cooperative idler rolls 46,46 engageable with the exterior of the pattern cam 18 and straddling the operating zone of the needles 14.
  • the idler rolls 46 are respectively mounted in blocks 48 (FIG. 3) having adjustable tongue and groove connection with the bracket 24, whereby a range of thickness in the rails of pattern earns 18 can be accommodated by means of adjusting set screws 50,50 respectively securing the blocks 48 to the bracket 24.
  • a fluidpressure device in the form of a dual acting piston rod 52 (FIG. 1) and a cylinder 54 is secured to the top of the head 10.
  • a lever 56 pivoted at 58 and connected to the rod 52 and to a link 60 coupled to the bracket 24 is enabled to elevate the drive mechanism with the pattern cam, the latter being shifted from the bed to its dash line position to facilitate reloading of next work pieces.
  • the machine operation will now be briefly reviewed assuming a selected pattern cam 18 rests upon work pieces W to be assembled.
  • the drive roll 36 is rotated about its vertical axis at a fixed speed determined by the ratio of the reducer accompanying the drive motor 26 and appropriate to the number of stitches per inch desired.
  • Operation of the motor-reducer may be operator-controlled or automatically started in response to lowering of the drive roll 36 to a level wherein the pattern cam is engaged thereby.
  • Progressive portions of the cam will be frictionally fed past the needles 14 by the coaction of the roll 36 and the idlers 46 and simultaneously slide the work piece margins through their operating zone.
  • the drive roll 36 is displaced and yields radially relative to the idlers as necessary while maintaining substantially uniform fric tional feeding force and hence constant linear speed of the work.
  • the rolls 36 and 46,46 at all times maintain the fabric feeding direction in the locality of the tool or needle 14 tangential-to the contour of the pattern cam 18.
  • cam 18 is often preferred. This enables automatic re-set of the cam to the same initial starting point even though stitching (or other processing) may not have extended over an entirely closed path. While the cam 18 is raised from the work and bed, the rolls may progress the perimeter of the cam idly to a suitably marked starting point.
  • a guide cam slidable in hold-down relation on the bed and of selected contour for frictionally sliding the work pieces on the bed, and feed mechanism for progressively advancing the guide cam jointly with the work relative to the operating zone of the tool.
  • a machine as in claim 2 wherein the rotatable means includes a drive roll in yieldable engagement with one vertical side wall of the guide cam, and at least one idler roll in cooperative engagement with an opposed vertical side wall of the cam.
  • spring means is arranged to urge the drive roll and idler rolls into wall clamping relation to the guide cam, and mechanism is operable to move the cam heightwise into and out of hold-down relation to facilitate removal and reloading of work pieces.
  • a head having stitch forming means including a reciprocable needle, 21 bed for slidably supporting work pieces engageable by the needle, a pattern cam disposable on the work pieces and having an upstanding rail portion extending in a contour corre sponding to the seam to be sewn, and power feed mechanism operable progressively on the rail portion adjacent to the operating zone of the needle, said mechanism including friction means rotatable about a vertical axis.
  • the friction means is a cylindrical roll carried by a bearing block and engageable with the interior of the cam opposite to the locality of the needle, and a pair of smaller diameter rolls one at either side of said locality clampingly engage the exterior of the cam.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00238034A 1972-03-27 1972-03-27 Pattern controlled feed mechanism Expired - Lifetime US3741140A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23803472A 1972-03-27 1972-03-27

Publications (1)

Publication Number Publication Date
US3741140A true US3741140A (en) 1973-06-26

Family

ID=22896222

Family Applications (1)

Application Number Title Priority Date Filing Date
US00238034A Expired - Lifetime US3741140A (en) 1972-03-27 1972-03-27 Pattern controlled feed mechanism

Country Status (4)

Country Link
US (1) US3741140A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS497044A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2315265A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2178657A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2581087A1 (fr) * 1985-04-30 1986-10-31 Rockwell Rimoldi Spa Machine a coudre double pour effectuer des coutures simultanement sur les bords opposes d'un article semi-fini
EP0190229A4 (en) * 1984-07-26 1986-11-27 Pacific Dunlop Ltd CONVEYOR AND GUIDE DEVICE FOR SEWING SOFT TEXTILES.
EP0757128A3 (en) * 1995-07-31 1997-08-20 Vianzino Bellan Mechanism for converting a rotating movement into a movement according to a curvilinear contour, in particular an oval contour
US20240003068A1 (en) * 2022-06-30 2024-01-04 Brother Kogyo Kabushiki Kaisha Embroidery sewing machine including carriage for moving embroidery frame attached thereto

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7501530A (nl) * 1975-02-10 1976-08-12 Philips Nv Werkwijze voor het insmelten van een glasgemeng en glasoven voor het uitvoeren van de werkwijze.
US4171672A (en) * 1978-01-09 1979-10-23 Usm Corporation Apparatus for holding work in a sewing machine
JPH0331260Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1987-05-30 1991-07-02

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190229A4 (en) * 1984-07-26 1986-11-27 Pacific Dunlop Ltd CONVEYOR AND GUIDE DEVICE FOR SEWING SOFT TEXTILES.
US4686916A (en) * 1984-07-26 1987-08-18 Dunlop Olympic Limited Transport and guide for sewing limp fabric
FR2581087A1 (fr) * 1985-04-30 1986-10-31 Rockwell Rimoldi Spa Machine a coudre double pour effectuer des coutures simultanement sur les bords opposes d'un article semi-fini
EP0757128A3 (en) * 1995-07-31 1997-08-20 Vianzino Bellan Mechanism for converting a rotating movement into a movement according to a curvilinear contour, in particular an oval contour
US20240003068A1 (en) * 2022-06-30 2024-01-04 Brother Kogyo Kabushiki Kaisha Embroidery sewing machine including carriage for moving embroidery frame attached thereto
US12297574B2 (en) * 2022-06-30 2025-05-13 Brother Kogyo Kabushiki Kaisha Embroidery sewing machine including carriage for moving embroidery frame attached thereto

Also Published As

Publication number Publication date
DE2315265A1 (de) 1973-10-11
FR2178657A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-11-09
JPS497044A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-01-22

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Legal Events

Date Code Title Description
AS Assignment

Owner name: EMHART INDUSTRIES, INC.,CONNECTICUT

Free format text: MERGER;ASSIGNOR:EMHART ENTERPRISES CORP., A NJ CORP.;REEL/FRAME:004870/0112

Effective date: 19871216

Owner name: EMHART ENTERPRISES CORP.

Free format text: CHANGE OF NAME;ASSIGNOR:USM CORPORATION;REEL/FRAME:004876/0901

Effective date: 19871104

Owner name: EMHART INDUSTRIES, INC., A CONNECTICUT STOCK CORP.

Free format text: MERGER;ASSIGNOR:EMHART ENTERPRISES CORP., A NJ CORP.;REEL/FRAME:004870/0112

Effective date: 19871216