US3818851A - One-direction rotating blade for sewing machines cutters - Google Patents

One-direction rotating blade for sewing machines cutters Download PDF

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Publication number
US3818851A
US3818851A US00256325A US25632572A US3818851A US 3818851 A US3818851 A US 3818851A US 00256325 A US00256325 A US 00256325A US 25632572 A US25632572 A US 25632572A US 3818851 A US3818851 A US 3818851A
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US
United States
Prior art keywords
blade
movable
rotation
cutter
drive shaft
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
US00256325A
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English (en)
Inventor
N Marforio
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.)
Virginio Rimoldi and Co SpA
Original Assignee
Virginio Rimoldi and Co SpA
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 Virginio Rimoldi and Co SpA filed Critical Virginio Rimoldi and Co SpA
Application granted granted Critical
Publication of US3818851A publication Critical patent/US3818851A/en
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
    • D05B65/00—Devices for severing the needle or lower thread
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8789—With simple revolving motion only
    • Y10T83/8792—Variable speed during one revolution [e.g., intermittent]

Definitions

  • ABSTRACT [52 us. or 112/130, 83/593, 112/124 A cuttingmechanism for use 09 sewing machines 51 1111.
  • Another object of this invention is to provide an improved cutter that utilizes a movable blade that travels only in one direction when performing its cutting function and when returningto a rest position; w
  • FIG. 1 illustrates in schematic plan the present cutter mounted ona sewing machine and also. the electrical control circuit for the cutter;
  • FIG. 2 shows 'a transverse sectional view of the clutching-drive means and the braking apparatus
  • FIG. 3 shows a top plan view partially in section showing the way in which the movable blade is mounted
  • FIG. 4 is a side elevation of the apparatus shown in FIG. 3 indicating the path of travel of the movable cutter blade
  • FIG. 5 is a top elevation showing the cooperating cutting blades in cooperating position.
  • FIG. 1 of the drawings there is shown a sewing machine I madeup of a standard or arm 2, a supporting base 3, an arm 4 and a work supporting surface 5. At the end of arm 4 there are located a needle bar 6 and a presser foot 7 that cooperates with the needle bar 6 to perform the seaming operation. It can also be seen in FIG. -1 that the sewing machine 1 has on it an auxiliary puller 8 that assists in drawing the fabric through the sewing station.
  • the cutter of the present invention is of the type where a fixed blade 9 cooperates with a movable blade 10.
  • this type of cutting operation is essentially that of a pair of scissors, but unlike the conventional scissors where one blade is oscillated back and forth to cooperate withthe stationary blade, the present movable blade 10 travels ina complete circle so that when it hasfmoved past the cutting station it is completely removed from the plane of the fabric.
  • the fixed blade 9 is mounted on the machineby a conventional means which here are shown as rivets 11 in FIG. 5 of the drawings. In this case the rivets are secured to a small bar 12 that is secured by means of screws I3 to support 14 which support is in turn secured to the base 50f sewing machine I.
  • a shaft'lS, FIG. '3, is mounted in support 14 for rotation to carry the'movable cutting blade 10. Also on shaft 15 there is a cog wheel'l6 which is keyed 'to the shaft and is responsible by means of'toothed belt 17 for the rotation of the shaft 15. On'the other end from the cog member l6-the shaft is provided with a radial projection 18 that retains a biasing spring 19 within the recess 20 formed in the support 14. The purpose of this, biasing spring is only to assure thatclose contact is maintained between the cooperating pairs of cutter blades 9 and-I0.
  • the cog-wheel is driven and it in turn affects rotation of the shaftlS by means of the toothed belt 17 that extends from member 16 to a clutching arrangement (to be described)-and ultimately tothe suitable drive means which is shown in FIG. 1 as an electric motor 36.1 a
  • the cog wheel 16 is by means of belt 17 connected with a cog wheel 21 that is securely attached to an elongated drive shaft 22.
  • Shaft 22 is commonto an electromagnetic clutching arrangement and also to brakingmeans which are located on the opposite' end of the shaft 22.'The entire clutching and braking mechanisms are shown generally by the numerals 23 and 24.
  • Shaft 22 is rotatably mounted within the bearings 26 on frame 25.Turning first to the electromagnetic clutch 23, this clutch includes a first conductive part 27 which is attached to shaft 22by means of the set screw 28.
  • the conductive part 27 also includes isin turn mounted for rotation on shaft 22 by means of bearings 32.
  • the pulley indicated by numeral 31 is connected by means of the belt 33 to pulley 34 that is keyed on the shaft 35 of the drive means comprised of electric motor 36.
  • the electromagnetic clutch 23 includes an excitation coil 37 which is contained in frame
  • the brake 24 is also electromagnetically operated and includes a braking part 38 which is stationarily affixed to the frame 25.
  • Part 38 of the brake 24 includes a friction material40 that is suitable to engage the element 39.
  • Element 39 is mounted in such a way that it must rotate with rotation of shaft 22 but can at the same time move in a direction parallel to the longitudional axis of shaft 22. Sliding occurs on a wheel 41 which is affixed to-the shaft by means of the set screw 42.
  • the numeral 43 indicates the excitation winding of the brake 24 and this winding is carried on the frame 25 in the same fashion as coil 37 of the electromagnetic clutch.
  • the circuit used to energize-the excitation coils 37 and 43 include as important components a rectifier bridge 46', a condenser C, a manual actuating switch 47, a diode 48 and a cam operated switch 49.
  • switches R1, R2 and a relay R are also involved. It is the function of the switch 47 to either connect the bridge rectifier 46 to the condenser C for the purpose of charging the condenser or to close the other of the two circuits that it is connected with. There it allows the condenser C to discharge through the diode 48 and then into one of the coils 37 or 43, depending upon which way switch R2 has been closed. Assuming that the switch 47 is moved from the position shown in FIG. 1 to the other of the two positions, then condenser C will discharge and send excitation current to the winding of relay R which will then close the first contact R1 and then the contact R2 to energize winding 37 of the electromagnetic clutch.
  • a workpiece cutter for sewing machines comprising:
  • a stationary cutter blade mounted in fixed position on said sewing machine;
  • a movable cutter blade mounted operatively adjacent said stationary cutter blade for unidirectional turning in a cutting direction about an axis of rotation whereby said workpiece is cut between said movable and stationary blades;
  • a second conductive clutch plate mounted on said drive pulley for rotation therewith, said second plate being movable axially parallel to the axis of said elongated drive shaft to engage said first clutch plate;
  • braking means operatively connected to said elongated drive shaft
  • a workpiece cutter as defined in claim 1 wherein said means to engage and disengage said first and second clutch plates includes cam means effective to stop rotation of said movable cutting blade after it has moved unidirectionally past said stationary blade.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00256325A 1971-06-17 1972-05-24 One-direction rotating blade for sewing machines cutters Expired - Lifetime US3818851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2594471 1971-06-17

Publications (1)

Publication Number Publication Date
US3818851A true US3818851A (en) 1974-06-25

Family

ID=11218218

Family Applications (1)

Application Number Title Priority Date Filing Date
US00256325A Expired - Lifetime US3818851A (en) 1971-06-17 1972-05-24 One-direction rotating blade for sewing machines cutters

Country Status (6)

Country Link
US (1) US3818851A (OSRAM)
JP (1) JPS5543794B1 (OSRAM)
DE (1) DE2228965A1 (OSRAM)
ES (1) ES403929A1 (OSRAM)
FR (1) FR2142499A5 (OSRAM)
GB (1) GB1349428A (OSRAM)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948133A (en) * 1974-09-27 1976-04-06 Trim-Master Corporation Rotary blade cutting assembly
US4603647A (en) * 1985-01-14 1986-08-05 Mim Industries, Inc. Sewing machine with edge trimmer
US4777891A (en) * 1986-10-22 1988-10-18 Union Special, G.M.B.H. Cutting device for use with a sewing machine
US20240044062A1 (en) * 2022-08-04 2024-02-08 Juki Corporation Chain-off thread cutter

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK129084A (da) * 1984-02-29 1985-08-30 Rockwool Business Dev Roterende kniv til i det mindste delvis gennemskaering af plader af fibermateriale
JPS6443485A (en) * 1987-08-07 1989-02-15 Sanki Eng Co Ltd Sliding-door locking device for elevator
IT1233642B (it) * 1989-03-23 1992-04-13 Teseo Srl Dispositivo tagliacatenella per macchine da cucire ad un solo filo

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US348485A (en) * 1886-08-31 willcox
US1993951A (en) * 1929-09-28 1935-03-12 Marselius T Ashe Ticket delivering device
US2192292A (en) * 1938-09-20 1940-03-05 Sussman Samuel Cutting attachment for sewing machines
US2519201A (en) * 1949-06-07 1950-08-15 Richard L Seidman Machine for cutting strips from continuous material, such as webbing, ribbon, or the like
US3114282A (en) * 1958-04-05 1963-12-17 Reifenhauser K G Apparatus for the transverse severance of continuously moving tubular structures
US3590678A (en) * 1969-07-31 1971-07-06 Gen Mills Inc Extrusion apparatus with a cutting mechanism having means to stop the cutter at a predetermined position

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US348485A (en) * 1886-08-31 willcox
US1993951A (en) * 1929-09-28 1935-03-12 Marselius T Ashe Ticket delivering device
US2192292A (en) * 1938-09-20 1940-03-05 Sussman Samuel Cutting attachment for sewing machines
US2519201A (en) * 1949-06-07 1950-08-15 Richard L Seidman Machine for cutting strips from continuous material, such as webbing, ribbon, or the like
US3114282A (en) * 1958-04-05 1963-12-17 Reifenhauser K G Apparatus for the transverse severance of continuously moving tubular structures
US3590678A (en) * 1969-07-31 1971-07-06 Gen Mills Inc Extrusion apparatus with a cutting mechanism having means to stop the cutter at a predetermined position

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948133A (en) * 1974-09-27 1976-04-06 Trim-Master Corporation Rotary blade cutting assembly
US4603647A (en) * 1985-01-14 1986-08-05 Mim Industries, Inc. Sewing machine with edge trimmer
US4777891A (en) * 1986-10-22 1988-10-18 Union Special, G.M.B.H. Cutting device for use with a sewing machine
US20240044062A1 (en) * 2022-08-04 2024-02-08 Juki Corporation Chain-off thread cutter
US12371834B2 (en) * 2022-08-04 2025-07-29 Juki Corporation Chain-off thread cutter

Also Published As

Publication number Publication date
ES403929A1 (es) 1975-05-16
DE2228965A1 (de) 1972-12-21
GB1349428A (en) 1974-04-03
JPS5543794B1 (OSRAM) 1980-11-08
FR2142499A5 (OSRAM) 1973-01-26

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