US1738186A - Cutting attachment for sewing machines - Google Patents

Cutting attachment for sewing machines Download PDF

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Publication number
US1738186A
US1738186A US182664A US18266427A US1738186A US 1738186 A US1738186 A US 1738186A US 182664 A US182664 A US 182664A US 18266427 A US18266427 A US 18266427A US 1738186 A US1738186 A US 1738186A
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US
United States
Prior art keywords
cutter
clutch
shaft
arm
seam
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
US182664A
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English (en)
Inventor
Krasa Albert
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.)
ST Regis Paper Co
Original Assignee
ST Regis Paper Co
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
Priority to BE350419D priority Critical patent/BE350419A/xx
Priority to NL40796D priority patent/NL40796C/xx
Application filed by ST Regis Paper Co filed Critical ST Regis Paper Co
Priority to US182664A priority patent/US1738186A/en
Priority to GB10649/28A priority patent/GB288552A/en
Priority to FR652442D priority patent/FR652442A/fr
Application granted granted Critical
Publication of US1738186A publication Critical patent/US1738186A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/107—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive pneumatic drive, e.g. crankcase pressure drive
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B13/00—Machines for sewing sacks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2303/00—Applied objects or articles
    • D05D2303/02—Tape
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2305/00—Operations on the work before or after sewing
    • D05D2305/08—Cutting the workpiece
    • D05D2305/12—Cutting the workpiece transversally
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/07—Nozzles and injectors with controllable fuel supply
    • F02M2700/074—Injection valve actuated by fuel pressure for pressurised fuel supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/07—Nozzles and injectors with controllable fuel supply
    • F02M2700/075—Injection valve actuated by cylinder pressure or other air pressure for pressurised fuel supply

Definitions

  • Patented Da-n 3 1929 UNITED STATES PATENT OFFICE ALBERT KRASA, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ST. REGIS PAPER COMIANY, F NEW YORK, N. Y., A CORPORATION OF NEW YORK CUTTING ATTACHMENT FOR SEWING MACHINES Application filed April 11,
  • My invention relates to a cutting attachment for a sewing machine, and has as its object to provide a cutter particularly adapted tosever reinforcing tape between bags the mouths of which have been closed by a seam sewed through the tape.
  • the object and details of my invention will appearmore fully as the description proceeds.
  • Figure 1 is a side elevation of one form of apparatus embodying my invention.
  • Fig. 2 is a view of the apparatus shown inFig. 1, looking from beneath.
  • Figs. 3 and 3 are cross-sections on the lines 3-3 and 4-4, respectively, in Fig. 1.
  • Fig. 5 is a cross-section on the line 5--5 of Fig. 3.
  • Fig. 6 is a cross-section on the line@ 6--6 of Fig. 1.
  • Figs. 7 and 8 are details of 4portions ofthe clutch operating mechanism.
  • Fig. 9 is similar to Fig. 8, but shows the parts in a different position.
  • Figs. 10 to 15 are diagrammatic views of the ⁇ feed dogs and tape cutting knives in different positions.
  • the apparatus disclosed shows my improvements applied to a'sewing head substantially like that disclosed in the co-pending application of A. M. Bates and myself, Serial No..616,37 2, whichihas eventuated in Patent' No. 1,625,r 81, issued April 26, 1927.
  • the tops of bags are fed in succession through the sewing machme, which applies reinforcing tape to the s ides of the mouths ofthe bags andsews a continu ous seam'through the reinforcing tape and the interposed walls of the bag.
  • Theimprovements forming the subject of this mventlon relate particularly to means for severing the reinforcing tape between successive bags.
  • the tape is fed to position in front of the needle by tape guides 21 and 22. Afterl the top 23 of onepbag has been completely sewed, the seam is continued through tape 24 beyond the edge of the bag to the top of the next bag 25; In order to disconnect the two bags from each other, it is necessary to cut the tape 24.
  • the tape is cut* ⁇ 50 by a stationary knife and a movable knife.
  • the stationary knife 26 is mounted in a knifecarrier 27 and projects into a suitable slot 28 in the throat plate 29, so as to be located at' one side of the path of the tape.
  • Movable knife 3() is mounted on the oppo- 55 site side of the tape in a knife carrier 31, which is reciprocable in suitable uides to move the knife 30 across the path o? the tape and sever it against fixed knife 26.
  • the movable knife is actuated by carrier 31 60 which is connected by a link 32 to an arin 33 on a rock shaft 34.
  • the other end of rock shaft 34 carries an arm 35 connected by a link 36to a crank 37 on a crank-disc 38 attached to the end of a clutch-shaft 39.
  • carrier 31 60 which is connected by a link 32 to an arin 33 on a rock shaft 34.
  • rock shaft 34 carries an arm 35 connected by a link 36to a crank 37 on a crank-disc 38 attached to the end of a clutch-shaft 39.
  • the reciprocating knife 30 is reciprocated once for each revolution of the clutch shaft 39.
  • the clutch-shaft 39 is parallel to the main shaft 4() of the sewing machine.
  • a pinion 41 .7o on the main shaft of the sewing machine meshes with a clutch-gear 42 mounted loosely on the clutch-shaft.
  • Clutch-gear 42 comprises a disc portion 43 carrying gear teeth around its periphery 75 and 'cut away to form a recess 44 in which is mounted a flange 45 of clutch member 46.
  • Gear 42 also comprises a collar 47 which fits gver a sleeve 48 mounted on the clutch-shaft Pins 49 project from clutch member 45 through slots 50 in disc member 43, and are connected by springs 51 with pins 52 fast on disc member 43.
  • Bumper members 53 are securely fastened bymean's of screws 54 ⁇ to g5 disc member 43.
  • Cam member 55 carries a disc cam 59.
  • clutch dog 60 is pivoted at 61 to disc 59. Dog 10U shown, similar to pin 88.
  • a spring 64 normally urges dog 60 into engagement with clutch member 46.
  • the dog is provided with a projecting finger 65 which engages a trip pin 66 and holds the dog out of engagement with clutch member 46, except when the trip pin is withdrawn.
  • a trip arm 67 is pivoted at 68 to a bracket 69 in position to have its end 70 contact bags immediately beneath the seam as they are fed through the sewing machine.
  • Another arm 71 extends from pivot 68 and forms with arm 67 a bell crank lever.
  • a pin 72 in the end of arm 71 engages a fork 73 on the end of an arm 74 fixed on a rock shaft 75.
  • a member-76 is fixed in adjusted position and has a notch 77 the ends of which act as limits for the movement of a pin 78 ⁇ extending from arm 71. In this way the extent of the rocking movements of arm 67 and shaft 75 are limited.
  • trip pawl 88 similar to trip pawl 81, except that pawl 88 is provided with a tooth 89 instead of notch 82.
  • the shape of tooth 89 is shownin dotted lines in Fig. 3.-
  • the end of pawl 88 rests against an arm 90 extending in an opposite direction from arm 83 from the pivot of rocking member 84.
  • a lugV 91 extends from! pawl 88 andhas attached thereto a spring 92 whose other end is fixed to a pin not Trip pin 66 is slidable in a hole 93 in a fixed bracket 94 which supports the clutch shaft and its attachments.
  • One arm 101 of this member carries a cam roller 102 in engagement with the periphery of 4disc cam 59.
  • Another arm 103 of member 100 is connected by a strong spring 104 to a pin 105 fixed to In one side of member 109 carries arcross-p'iece 111.
  • At each end of cross-piece 111 there is a pair of pins 112 between which pins a pawl 81 or 88 is positioned.
  • a pin 113 is adjustably fixed by a set screw 114 in position to limit the entrance of the respective pawl between pins 112.
  • the' tape cutting knife 30 is adapted to operate between the usual presser foot 115. and an auxiliary presser foot 116.
  • Presser foot 116 is preferably pivoted at 117 to a carrier 118 for limited oscillation with respect to the carrier. It has an upturned guiding toe 119.
  • a movable tapedepressing member 120 pivoted to the main presser foot and normally depressed by a spring 121. n.
  • ⁇ Knife 30 is constructed with a guide extension 121.
  • the end of extension 121 is beveled so as to slide from the end of fixed knife 26 and bring the cutting edge proper 122 of the reciprocating knife into shearing engpgement with the cutting edge of the fixed mi e.
  • rthe* mechanism shown comprises feed dogs 123, 124 in suitable relation to the presser feet. Furthermore, in the mechanism disclosed, there is a trimming knife 125 mounted in a slide-way in the feed dog carrier, in a manner similar to that disclosed in the previously mentioned application, and which does not need to be further described in this case. l 1 The operation of the apparatus is as folows: 1
  • member 55 continues to turn and 130 drive clutch shaft 39 with its crank until a complete revolution of shaft 39 has taken place.
  • rock shaft 34 is oscillated and cutting knife 30 is driven downward and then drawn upward.
  • cam 107 operates in fork 108 to move the fork downward and to raise pins 112, 113 upward, thereby moving the trip pawls upward out of engagement with arms 83 and 90 of oscillating member 84.
  • Arm 106 is moved to the position in which it is shown in Fig. 8 beforetrip pawl 81 is released from arm 83, so that the end of arm 106 temporarily blocks the downward movement of arm 96 by engaging lug 98 thereon.
  • Fig. 8 immediately after the position in which the parts are shown in Fig.
  • roller 102 runs down on cam run 126-of cam 59 and moves arm 106 out of engagement with lug 98 and allows spring 127, attached to arm 90 and to fork 108, to oscillate member 84 and drivepin 66 downward so .that its end projects in the path of the clutch-dog and throws it out of engagement with clutch member 46 when a revolution of shaft 39 is completed.
  • tooth 89 of pawl 88 is just below arm 90 with that arm in the position in which it is shown in Fig. 5. This ⁇ allows pin 66'to remain in its stopping position as shown in Fig. 5, until end 70 is raised. The raising of end 70 by the next bag sewed rocks shaft and raises arm 80 and pawl 88.
  • Cam 59 is provided with a socket 128 into which roller 102 fits when the clutch shaft i has arrived in position to result in the disengagement of the dog by pin 66.
  • Spring 104 1s of sufficient strength to normally stop'y the movement of the clutch shaft and associated parts when roller 102 enters notch 128; but when spring 104 is n'ot suflciently strong to overcome the momentum of the parts and prevent their turning beyond the intended point, roller 102 can ride up out of the notch only as far as shown in Fig. 9.
  • arm 106 engages projection 98 on arm 97. This forms apositive limit to the movement of the cam and clutch shaft asn long as pin 66 and consequently projection 98 remain in the posit-ions in which they are shown in Fig. 5,
  • the action of spring 10e through roller 102 normally returns the cam Y to the intended rest position, with the roller resting in notch 128.
  • the gearing ratio is such that the shaft 39 makes one revolution 'When the main sewing machine shaft makes two revolutions.
  • the tape may be drawn upward to. some extent by the upward movement of the cutting knife, as indicated in Fig. 14, but the tape-depressing member attached to the -foot promptly returns the tape to its proper position after the cutter is raised.
  • Two notches are provided in clutch member 46 so that the clutch shaft and cutter is driven the first time that the main shaft of the sewing machine arrives at proper position after the Itrip )ing of the clutch.
  • dog 124 grips the work slightly sooner ⁇ than does feed.dog 123, and tends ⁇ to move 1t forward a slightly greater distance. This fact is utilized' in parting the tape. The rst feeding movement of the feed dogs after the tape is severed tends to move the severed end slightly farther than the end still connected to the source of supply, so as to open up a gap such' as shown at 129 on Fig. 15.
  • a sewing device adapted to sew a continuous seam across successive at by the above describedarticles, a cutter through which the seam passes as it moves away from said device, and means to actuate the cutter and make one cut across' the seam a predeterminedJ distance in advance of the front edge of an article and to make one cut across the seam a predetermined distance behind the rear edge of an article.
  • a sewing device adapted to sew a continuous seam across a plurality of articles, and a seam cutter towards which the seam moves from said device, a trip in the path of the articles at one side of the seam and adjacent the cutter, and connections from the trip operating the cutter to make one cut across the seam a, predetermined distance in advance of theforward edge of the article and to make one cut across the seam a predetermined distance behind the rear edge of an article.
  • a sewing device adapted to form a continuous seam across a plurality of drticles, a seam cutter towards which the seam moves' from said device, a continuously operating source of power for the cutter, a one-revolution.
  • clutch connecting the source of power with the cutter, and means actu' ated by the articles to close the clutch when the forward edge of an article approaches the cutter to a predetermined point and when the rear edge of an article has passed the cutter a predetermined distance.
  • a device adapted to sew a continuous tape to a series of bags, a cutter towards which the tape moves from the device, operating means for the cutter, a trip in the path ofthe bags at one side of the tape, 'and connections whereby the cutter is actuated to make one cut across the tape and seam sewed therethrough when the trip moves from its normal position to a position resting against a passing bag and when the trip moves from its position resting against a passing bag to its normal position.
  • a sewing ⁇ device and a seam cutter towards which the seam moves from said device a trip movable to two positions in accordance with the passage-of work through the machine, and connections ⁇ be tween the trip and the cutter causing' the cutter to be actuated once for each movement of the trip from either one of its positions to its other position.
  • a sewing machine having a needle, a feed dog, and a main shaft operating the needle and feed dog in timed relation, a seam cutter in position to sever a seam sewed by the needle, a cutter shaft adapted to actuate the cutter to make one cut during one revolution thereof, and gearing connecting the cutter shaft with the main shaft and driving the cutter shaft one revolution for two revolutions of the main shaft, the connection from the cutter shaft to the cutter being timed so that the cutter crosses the seam during one idle stroke of the feed dog.
  • a sewing machine having a needle and feed dog, and means driving the needle and feed dog in timed relation, a reciprocating cutter, and connections adapted to reciprocate the cutter once during two reciprocations of the needle and feed dog, the connections being timed to move the reciprocating cutter into and out of the path of the seam during one idle stroke of the feed dog.
  • a sewing machine having a needle and feed dog, and means driving the needle and feed dog in timed relation, a reciprocating ⁇ seam-cutter, connections adapted to reciprocate the cutter once during two reciprocations of the needle and feed dog, the connections being timed to move the reciprocating cutter into andout of the path of the seam during one idle stroke of the feed dog.
  • a stationary cutter on the opposite side of the path of the scam from the normal position of the reciprocating cutter, and in position to have shearing co-operation with the reciprocating cutter, and a guide finger extending from one side of the reciprocating cutter and adapted to guide the reciprocating cutter into shearing relation with the stationary cutter.
  • a seam-cutter for a, sewing machine comprising a stationary knife on one side of the path of thescam, a reciprocating knife normally on the other side of the path of the seam, and a finger extending from one edge of the reciprocating' knife towards, but not to, the stationary knife when the knives are separated, the reciprocating ⁇ knife being so mounted as to tend to abut the stationary knife, and the end of the finger being bevelled to slide from the edge of the stationary knife and guide the cutting edge of the reciprocating knife into shearing relation with the stationary knife, and the edge of the reciprocating knife being beveled in the opposite direction from the end of the finger.
  • a sewing'machine having a main shaft, a cutter shaft, a seam-cutter driven by the cutter shaft, a one-revolution clutch on the cutter shaft driven by the ⁇ main shaft, saidone-revolution clutch comprising a stop means, and said stop means comprising a cam having a stop socket therein, 'a cam roller, a spring pressing the roller against.
  • a sewing machine having a main shaft, a seam-cutter attached to the sewing machine and having a cutter shaft, and driving connections between the main shaft and the cutter shaft, said driving connections comprising a limited lost motion connection and spring means tending to turn the cutter shaft forward to the limit of said lost motion.
  • a sewing machine having a main shaft, a cutter and a cutter shaft,
  • a sewing machine having a main shaft, a seam-cutter having a cutter shaft, a gear loose on the cutter shaft and meshing with a gear on the main shaft in two to one relation, and clutch means between the gear and the cutter shaft, one of the members of said clutch con'iprising a dog andl the other member having therein two oppositely disposed notches with either of which the dog may co-operate.
  • a device for sewing a continuous seam through successive articles a sea1n-cutter, a continuously operating driving device for the cutter, a one-operation clutch for connecting the cutter tothe driving device for one operation of the cutter, a trip finger in the path of the articles as they move 1Lpast the cutter, a rock shaft to which the trip nger is attached, and two trip pawls connected tovsaid rock shaft, one of said pawls being ⁇ connected to trip the clutch when the shaft is rocked in one direction, and the other pawl being connected to trip the clutch when the shaft is rocked in the other direction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US182664A 1927-04-11 1927-04-11 Cutting attachment for sewing machines Expired - Lifetime US1738186A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE350419D BE350419A (en)) 1927-04-11
NL40796D NL40796C (en)) 1927-04-11
US182664A US1738186A (en) 1927-04-11 1927-04-11 Cutting attachment for sewing machines
GB10649/28A GB288552A (en) 1927-04-11 1928-04-10 Improvements in or relating to cutting attachments for sewing machines
FR652442D FR652442A (fr) 1927-04-11 1928-04-10 Perfectionnements apportés aux machines à coudre, notamment à celles pour la fabrication de sacs en papier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US182664A US1738186A (en) 1927-04-11 1927-04-11 Cutting attachment for sewing machines

Publications (1)

Publication Number Publication Date
US1738186A true US1738186A (en) 1929-12-03

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Application Number Title Priority Date Filing Date
US182664A Expired - Lifetime US1738186A (en) 1927-04-11 1927-04-11 Cutting attachment for sewing machines

Country Status (5)

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US (1) US1738186A (en))
BE (1) BE350419A (en))
FR (1) FR652442A (en))
GB (1) GB288552A (en))
NL (1) NL40796C (en))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423080A (en) * 1944-11-10 1947-07-01 Bemis Bro Bag Co Bag closing machine
US3082718A (en) * 1960-11-28 1963-03-26 Minneapolis Sewing Machine Inc Bag closing and thread cutting device
US3461825A (en) * 1967-10-11 1969-08-19 Kor It Co Inc The Sheet-handling apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423080A (en) * 1944-11-10 1947-07-01 Bemis Bro Bag Co Bag closing machine
US3082718A (en) * 1960-11-28 1963-03-26 Minneapolis Sewing Machine Inc Bag closing and thread cutting device
US3461825A (en) * 1967-10-11 1969-08-19 Kor It Co Inc The Sheet-handling apparatus

Also Published As

Publication number Publication date
NL40796C (en))
BE350419A (en))
FR652442A (fr) 1929-03-08
GB288552A (en) 1929-05-02

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