IT1250228B - PROCEDURE AND DEVICE FOR SHORTENING THE NEEDLE THREAD AT THE BEGINNING OF SEWING IN DOUBLE STITCH SEWING MACHINES. - Google Patents

PROCEDURE AND DEVICE FOR SHORTENING THE NEEDLE THREAD AT THE BEGINNING OF SEWING IN DOUBLE STITCH SEWING MACHINES.

Info

Publication number
IT1250228B
IT1250228B ITTO910922A ITTO910922A IT1250228B IT 1250228 B IT1250228 B IT 1250228B IT TO910922 A ITTO910922 A IT TO910922A IT TO910922 A ITTO910922 A IT TO910922A IT 1250228 B IT1250228 B IT 1250228B
Authority
IT
Italy
Prior art keywords
thread
needle thread
sewing
shortening
pick
Prior art date
Application number
ITTO910922A
Other languages
Italian (it)
Inventor
Karl-Heinz Walther
Fritz Jehle
Original Assignee
Pfaff Ag G M
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 Pfaff Ag G M filed Critical Pfaff Ag G M
Publication of ITTO910922A0 publication Critical patent/ITTO910922A0/en
Publication of ITTO910922A1 publication Critical patent/ITTO910922A1/en
Application granted granted Critical
Publication of IT1250228B publication Critical patent/IT1250228B/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • 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
    • D05D2207/04—Suction or blowing devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

In un procedimento ed un dispositivo per accorciare il capo del filo dell'ago all'inizio della cucitura in macchine per cucire a doppio punto a catenella, l'elemento di prelievo (23) del filo di un dispositivo di taglio del filo (22, 60, 90) comunque previsto viene mosso durante il primo ciclo di formazione del punto nella sua posizione di prelievo del filo, in cui o per scelta di un momento adatto per il movimento dell'elemento di prelievo (23) del filo o mediante una corrente d'aria in pressione uscente da un condotto (81) di aria in pressione si fa sì che almeno il lato del cappio del filo dell'ago disposto verso l'alimentazione venga prelevato dall'elemento di prelievo (23) del filo. Nel momento di ritorno dell'elemento di prelievo (23) del filo nella sua posizione di partenza viene tagliata una parte del capo del filo dell'ago. Inoltre il filo dell'ago viene bloccato o sotto una molla a lamina (44) o viene spinto sotto il piedino premistoffa con un passo di avanzamento sufficientemente grande e quindi bloccato qui con accoppiamento d'attrito.fig. 5In a method and a device for shortening the end of the needle thread at the start of sewing in double chain stitch sewing machines, the thread picking element (23) of a thread cutting device (22, 60, 90), however provided, is moved during the first cycle of formation of the stitch in its position for picking up the thread, in which either by choosing a suitable moment for the movement of the pick-up element (23) of the thread or by means of a current pressurized air exiting from a pressurized air duct (81) ensures that at least the side of the loop of the needle thread disposed towards the feed is taken from the thread pick-up element (23). When the thread pick-up element (23) returns to its starting position, a part of the end of the needle thread is cut. Furthermore, the needle thread is blocked either under a leaf spring (44) or is pushed under the presser foot with a sufficiently large feed step and then blocked here with friction coupling. 5

ITTO910922A 1990-11-30 1991-11-28 PROCEDURE AND DEVICE FOR SHORTENING THE NEEDLE THREAD AT THE BEGINNING OF SEWING IN DOUBLE STITCH SEWING MACHINES. IT1250228B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4038194 1990-11-30
DE4118008A DE4118008A1 (en) 1990-11-30 1991-06-01 METHOD AND DEVICE FOR SHORTENING THE NEEDLE THREAD AT THE START OF SEWING IN DOUBLE-LOCK STITCH SEWING MACHINES

Publications (3)

Publication Number Publication Date
ITTO910922A0 ITTO910922A0 (en) 1991-11-28
ITTO910922A1 ITTO910922A1 (en) 1993-05-28
IT1250228B true IT1250228B (en) 1995-04-03

Family

ID=25898917

Family Applications (1)

Application Number Title Priority Date Filing Date
ITTO910922A IT1250228B (en) 1990-11-30 1991-11-28 PROCEDURE AND DEVICE FOR SHORTENING THE NEEDLE THREAD AT THE BEGINNING OF SEWING IN DOUBLE STITCH SEWING MACHINES.

Country Status (6)

Country Link
JP (1) JPH06503008A (en)
KR (1) KR100186838B1 (en)
DE (1) DE4118008A1 (en)
ES (1) ES2051177B1 (en)
IT (1) IT1250228B (en)
WO (1) WO1992009735A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2353297B (en) * 1999-08-16 2003-07-23 Duerkopp Adler Ag A double lockstitch machine comprising a thread gripper
JP2002346266A (en) * 2001-05-23 2002-12-03 Juki Corp Thread cutter for sewing machine
JP2008229082A (en) 2007-03-22 2008-10-02 Brother Ind Ltd Thread cutter of sewing machine
US8069799B2 (en) * 2009-01-09 2011-12-06 Zeng Hsing Industrial Co., Ltd. Thread cutting device for a sewing machine
DE102009039252A1 (en) * 2009-08-28 2011-03-10 Dürkopp Adler AG sewing machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289806C (en) *
DE1125742B (en) * 1961-08-11 1962-03-15 Pfaff Ag G M Thread trimmer on sewing machines
DE7912758U1 (en) * 1979-05-03 1979-07-26 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern THREAD CUTTING DEVICE ON SEWING MACHINES
DE3244996C2 (en) * 1982-12-04 1985-04-04 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Thread cutting device on sewing machines
DE3819135C1 (en) * 1988-06-06 1989-07-13 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern, De

Also Published As

Publication number Publication date
WO1992009735A1 (en) 1992-06-11
JPH06503008A (en) 1994-04-07
ES2051177A2 (en) 1994-06-01
DE4118008C2 (en) 1993-07-29
DE4118008A1 (en) 1992-06-11
ES2051177B1 (en) 1996-01-16
ITTO910922A1 (en) 1993-05-28
ITTO910922A0 (en) 1991-11-28
ES2051177R (en) 1995-06-16
KR100186838B1 (en) 1999-05-01
KR930703500A (en) 1993-11-30

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19971127