US2625393A - Web feeding mechanism for screen printing machines - Google Patents

Web feeding mechanism for screen printing machines Download PDF

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Publication number
US2625393A
US2625393A US125232A US12523249A US2625393A US 2625393 A US2625393 A US 2625393A US 125232 A US125232 A US 125232A US 12523249 A US12523249 A US 12523249A US 2625393 A US2625393 A US 2625393A
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Prior art keywords
wheel
roller
feeding
stop member
screen printing
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US125232A
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Worm Hugo Fritz
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TEXIMPEX AB
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TEXIMPEX AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0831—Machines for printing webs
    • B41F15/0845—Machines for printing webs with flat screens
    • B41F15/085—Machines for printing webs with flat screens with a stationary screen and a moving squeegee
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/2063—Stops

Definitions

  • the present invention relates to. screen printe ac ines. of t e pe, wh re a stenci i-of. c'ertein. length is placed on the, material to be printed and thec-olonring' matter is transferred to the material, whereaf-tfilt the stencil is removed and the material is advanced a distance corresponding to the lengthof the stencil before thestencil is again placed, on the. material,
  • By such a. printing where themeterial, for v instance a textile web, is moved step-wise over a, printing. table, it is very important thetthev length of the successive movementsofl the webis constant and equal to the length of the stencil; so, that the stencil, which isg'uidedinfixed guiding means,
  • the rotati'Qn Qf'sa id wheel in atleest one, direction corresponding to the feeding of the web is limitedby a. fixed stop member cooperatin with a movable stopv member driven by said wheel.
  • FIG. Fig. z isesid View of thefde vice shownin Fig. Fig 3yi-s f a. section on; the line 3 of Fig. 1'; Fig, 4;is a section on the line,
  • roller I projects outsid e;one oi its-bearings 4 and on the projecting. portion there is provided a chain wheel 5 for a driving chain from an electric motor (not-shown);
  • The;chein wheel 5 is rotetably mounted on thehub 6 of a, disk I secured to-the shaft- 3;
  • To thehnbfi' issecured another disk 8 on the opposite side of the chain wheel 5 and..between the disks mea s and the sides of. the chain wheel 5 there are provided friction lrings 9, for inste nc frong fibrous material ⁇ . whichlring's ere pressed against the "wheel 5JsoY1that 'atthturning of the wheel a.
  • Theistop; member, I 5 is displaceable', elong thehrackf and; can be secured to, itin; difierentfpositions by meansof a, screw I]; onthe rackctheretis ls'o; provided akscale I8 ion indicatingthedi s' lac ment position of the I stop, member I5; In-order to avoid play betwefinfgthe reck, I lendfthelcog; wheel I 0 there is provided atithe;backer theym'ck a diagrammatically,shownyroller l9 'whichib'y sp in 91s ss d; aea nsttthelrarck, I I1 and-uni turn forcesthe racklageinstithe wheel Ill.
  • the cog w-heel'l I) can be coupled vto theshdfflf' by means of a coupling disk 2'I securedtojthic: shaft and pro-videdwithfanexielflanges-22.
  • a coupling disk 2'I securedtojthic: shaft and pro-videdwithfanexielflanges-22 In" the cylind cal ringvfo med y,-said.flense sinih serted a cylin calip oiectinen rtionl inf-the;
  • the swinging of theglever 21 is effected by meens ofe conical f-ace 23fon11a; f collar 29 i lace bl nii' ei l n ated hub of the wheel lflgwhi hjfaice" 2 8'coopera1z'es with the fre e end,of thejever; 21;,
  • the rack I l is in its lower position where the stop ring l4 abuts against the guide member 12.
  • a feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member, .a, movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller.
  • a feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven Wheel and said roller, a rotatable wheel, a driving connection' including a disengageable clutch between said roller and said rotatable wheel, a fixed stop member, a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller, at least one of said stop members being adjustable to diiferent positions for varying the feeding length of the materiah 3.
  • a feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a braking means for the roller located between said overload coupling and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member and a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller.
  • a feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable cogwheel, a movable rack cooperating with said cogwheel, a driving con- After the nection comprising a disengageable clutch between said roller and said rotatable cogwheel, a fixed stop member, a stop member secured to said movable rack and cooperating with said fixed stop member in order to limit the rotation of said rotatable cogwheel in at least the direction corresponding to the feeding movement of the feedin roller.
  • a feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member and a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller, said movable stop member automatically returning to its initial position when the rotatable wheel is disconnected from the roller.
  • a feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member, a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller, said overload coupling consisting of an overload friction clutch the maximum torque of which is such that it slips when the stop members come into contact with each other.
  • a feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member, a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller, said overload coupling consisting of an overload friction clutch the maximum torque of which is such that it slips when the stop members come into contact with each other and said disengageable clutch consisting of a friction clutch having a greater maximum torque than said overload friction clutch.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Description

H. F. WORM Jan. 13, 1953 WEB FEEDING MECHAISM FOR SCREEN PRINTING MACHINES Filed Nov. 5, 1949 2 SHEETS-SHEET l MN g QM $N 2.
m v m IN VEN TOR.-
H. F. WORM Jan. '13, 1953 WEB FEEDING MECHAISM FOR SCREEN PRINTING MACHINES 2 SHEETS SHEET 2 Filed Nov. 5, 1949 Summon- Patented Jan. 13, 1953 WEB FEEDING MECHANISM FOR, SCREEN;
PRINTING MACHINES? Hugo Fritz Worm, .Uddevalla, Sweden, assignor to Akt iebolaget Teximpex, Uddevalla, S wede 13', a
cornora tion of Sweden 7 aims .1
The present invention. relates to. screen printe ac ines. of t e pe, wh re a stenci i-of. c'ertein. length is placed on the, material to be printed and thec-olonring' matter is transferred to the material, whereaf-tfilt the stencil is removed and the material is advanced a distance corresponding to the lengthof the stencil before thestencil is again placed, on the. material, By such a. printing where themeterial, for v instance a textile web, is moved step-wise over a, printing. table, it is very important thetthev length of the successive movementsofl the webis constant and equal to the length of the stencil; so, that the stencil, which isg'uidedinfixed guiding means,
will always be placed in correct position re1a-.
fl jtq the. a e d min ed a tern Dnebbject of the inventi-onis to. provide a deitie by m ans" 1 wh c =t n: ise-m nient or the web is automaticall limited, to the correct length and, theinvention is essentially characterized in that; s roller for the feeding of the web is constructed, and arranged toub e driven through an overload coupling and the-t there is provided" a wheel connect-ed to saidi roller by means of e disengeging clutch and preferably.
located on'the roll er sheit, the rotati'Qn Qf'sa id wheel in atleest one, direction corresponding to the feeding of the web, is limitedby a. fixed stop member cooperatin with a movable stopv member driven by said wheel.
In the accompanying drawings there is shown an embodiment] of the; invention applied. to a textileprinting'machine. In the drewing -sFig. 1
is anaxial section through the device according to the inv entionfFig. z isesid View of thefde vice shownin Fig. Fig 3yi-s f a. section on; the line 3 of Fig. 1'; Fig, 4;is a section on the line,
df r i i 15 i dii .1. s'et e5m nt r l vationshowing theogoeration of the shiftingycollar.
In-thedrewings I indicetes e roller, which is driving 'an endless ru bbeix web 7 2; ontwhich; the:
fabric "tofbe p linted; is preferably secured by meehis: oi an adhesive southat it cannot slide.
rela vely to the rnbberweb ,Whi,Q' intnrn does lslide on the roller I on account of the friction qualities of the rubbern Theshaft 3iof the.
roller I projects outsid e;one oi its-bearings 4 and on the projecting. portion there is provided a chain wheel 5 for a driving chain from an electric motor (not-shown); The;chein wheel 5 is rotetably mounted on thehub 6 of a, disk I secured to-the shaft- 3; To thehnbfi' issecured another disk 8 on the opposite side of the chain wheel 5 and..between the disks mea s and the sides of. the chain wheel 5 there are provided friction lrings 9, for inste nc frong fibrous material}. whichlring's ere pressed against the "wheel 5JsoY1that 'atthturning of the wheel a. limited torsionallimoment is transmitted the shaitidg Q 1 ee-" t 3 i fis s r urth otete y 22 mounted a, cos-wheel; I I): which can bercIiLtQ d o the'shaft w l b escr bed"belowi-andgwmc cooperates with a, toothe d 1 rec k l,l slidin 1115 guide members I2.'; l 3.. The rack-l l'li'isgfittgitsone end provided with, a, stop ring- It! cooperatin with the guide-member I'Z f or1ilni-ting the;-move-- ment of the rackin one direction; Onythe-ra lc I I there is further fasteneda. stopimemberl 5-in the shape. of a ring whichv cooperatesl withta race Is -on the fixedl lide member IL3E. Theistop; member, I 5 is displaceable', elong thehrackf and; can be secured to, itin; difierentfpositions by meansof a, screw I]; onthe rackctheretis ls'o; provided akscale I8 ion indicatingthedi s' lac ment position of the I stop, member I5; In-order to avoid play betwefinfgthe reck, I lendfthelcog; wheel I 0 there is provided atithe;backer theym'ck a diagrammatically,shownyroller l9 'whichib'y sp in 91s ss d; aea nsttthelrarck, I I1 and-uni turn forcesthe racklageinstithe wheel Ill.
The cog w-heel'l I) can be coupled vto theshdfflf' by means of a coupling disk 2'I securedtojthic: shaft and pro-videdwithfanexielflanges-22. In" the cylind cal ringvfo med y,-said.flense sinih serted a cylin calip oiectinen rtionl inf-the;
" Wheel 9 e ea mallend emet rjthan the inft ner-diameter of the fienge fl; Intheringshapedl a e we e an e. andthewheeli o bnz r e ehsfid plitfing Mewhibl'! cam e e d, y meanseterotflahle camz pintz 5; tw e he nds fm hfi ingand".W i hispfi Y6Ji' r WSST EC TQIL So thatlth l Hil in'-.'a. ,cer:- a l ng.- ce tin ;permit hesinsw en s he hz -erndgin an th r-inositio Hates t e rin en:ds.,. o.:th;et theri iiie xpended-ii The pin 251is providedwitlra 'cylindricaltpQrtioh" 26; which is journeled; in; an 'atperturegin' thief; wheel I@. Outside thiseperturejthecpinnortiont; is securedto a. 1ever"2-"l"bygmeansgof whichthe pin 25 can be rotated. The swinging of theglever 21 is effected by meens ofe conical f-ace 23fon11a; f collar 29 i lace bl nii' ei l n ated hub of the wheel lflgwhi hjfaice" 2 8'coopera1z'es with the fre e end,of thejever; 21;,
s h wn in. the drawing helhift' etcolliar.19; is provided with at circnlareroove 3l0j f0r en age? ment withflawclutch lever- 30f by rnee nsoiwhich; the shi ti ec la fl canv 'e movedaxiellvg Said; lever may, if jdes i red,,. be connected togthe. start ing means .of the driving motor fontheirollelt so that the motor is started when": theefzrictione clutch -2 2...2.t is [thrown in; rand stop};edwhen -thfl tightened; the wheel l 0, is disconnecte'dsfrqnro the shaft 3 andthe driving motor is at a standstill. At the same time the rack I l is in its lower position where the stop ring l4 abuts against the guide member 12. When the fabric has to be advanced the motor is started and the clutch between the wheel l6 and the shaft 3 is thrown in. On account of the brake 3|, 32, however, the shaft 3 is still standing still and the chain wheel 5 is rotating between the disks 7 and 8. When i the brake is released the shaft 3 begins to rotate and the rack ll is raised until the stop member 15 abuts against the face 16 on the guide member l3 when the rotation of the shaft is stopped while the chain wheel still rotates. brake 3 l, 32 has been tightened the motor can be stopped and the wheel l disconnected from the shaft 3, whereby the rack H sinks down to the initial position shown in the drawing.
It is evident that the maximum friction torque between the chain wheel and the shaft 3 must be smaller than the maximum friction torque be tween the flange 22 and the wheel Hi.
What I claim is:
1. A feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member, .a, movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller. i
2. A feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven Wheel and said roller, a rotatable wheel, a driving connection' including a disengageable clutch between said roller and said rotatable wheel, a fixed stop member, a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller, at least one of said stop members being adjustable to diiferent positions for varying the feeding length of the materiah 3. A feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a braking means for the roller located between said overload coupling and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member and a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller.
4. A feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable cogwheel, a movable rack cooperating with said cogwheel, a driving con- After the nection comprising a disengageable clutch between said roller and said rotatable cogwheel, a fixed stop member, a stop member secured to said movable rack and cooperating with said fixed stop member in order to limit the rotation of said rotatable cogwheel in at least the direction corresponding to the feeding movement of the feedin roller.
5. A feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member and a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller, said movable stop member automatically returning to its initial position when the rotatable wheel is disconnected from the roller.
6. A feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member, a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller, said overload coupling consisting of an overload friction clutch the maximum torque of which is such that it slips when the stop members come into contact with each other.
7. A feeding mechanism for screen printing machines comprising a feeding roller for the material to be printed, a positively driven wheel, a driving connection comprising an overload coupling between said positively driven wheel and said roller, a rotatable wheel, a driving connection comprising a disengageable clutch between said roller and said rotatable wheel, a fixed stop member, a movable stop member driven by said rotatable wheel and cooperating with said fixed stop member in order to limit the rotation of said rotatable wheel in at least the direction corresponding to the feeding movement of the feeding roller, said overload coupling consisting of an overload friction clutch the maximum torque of which is such that it slips when the stop members come into contact with each other and said disengageable clutch consisting of a friction clutch having a greater maximum torque than said overload friction clutch.
HUGO FRITZ WORM.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 530,385 Boatwright Dec. 4, 1894 1,110,328 Malm Sept. 15, 1914 1,222,957 Kramer Apr. 17, 1917 1,337,837 Gore Apr. 20, 1920 2,291,668 Weigolt Aug. 4, 1942
US125232A 1947-10-03 1949-11-03 Web feeding mechanism for screen printing machines Expired - Lifetime US2625393A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612238A (en) * 1970-05-11 1971-10-12 Edward M Newsome Feed control device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US530385A (en) * 1894-12-04 Cordage-measuring machine
US1110328A (en) * 1913-03-08 1914-09-15 Egry Register Co Manifolding device.
US1222957A (en) * 1915-10-28 1917-04-17 Norton Iron Works Wire-measuring device.
US1337837A (en) * 1920-04-20 Automatic ticket-dispensing machine
US2291668A (en) * 1939-02-25 1942-08-04 Alphonse D Weigolt Gummed tape dispenser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US530385A (en) * 1894-12-04 Cordage-measuring machine
US1337837A (en) * 1920-04-20 Automatic ticket-dispensing machine
US1110328A (en) * 1913-03-08 1914-09-15 Egry Register Co Manifolding device.
US1222957A (en) * 1915-10-28 1917-04-17 Norton Iron Works Wire-measuring device.
US2291668A (en) * 1939-02-25 1942-08-04 Alphonse D Weigolt Gummed tape dispenser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612238A (en) * 1970-05-11 1971-10-12 Edward M Newsome Feed control device

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