US3915088A - Silk screen printing machine having variable printing length - Google Patents

Silk screen printing machine having variable printing length Download PDF

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Publication number
US3915088A
US3915088A US266598A US26659872A US3915088A US 3915088 A US3915088 A US 3915088A US 266598 A US266598 A US 266598A US 26659872 A US26659872 A US 26659872A US 3915088 A US3915088 A US 3915088A
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United States
Prior art keywords
drum
stencil
lever
movement
length
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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
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US266598A
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English (en)
Inventor
Ake Svantesson
Astor Lindstrom
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0813—Machines for printing sheets with flat screens
    • B41F15/0827—Machines for printing sheets with flat screens with a stationary squeegee and a moving screen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B41F15/18—Supports for workpieces
    • B41F15/22—Supports for workpieces for single sheets

Definitions

  • the rotation of the drum is set to an angular l 549 533 8,1925 F l 0l/ value which in general corresponds substantially to the rIe 1,832,216 11/1931 Johnson et al length of the mammal to be pnnted' 2,105,328 1/1938 Molitor 101/282 2 Claims, 1 Drawing Figure US. Patent Oct. 28, 1975 SILKSCREEN PRINTING MACHINE HAVING VARIABLE PRINTING LENGTH BACKGROUND OF THE INVENTION
  • the present invention relates to stencil or silk screen printing machines and more specifically to the type of printing machines using a reciprocatingly rotatable drum having means for holding the material to be printed.
  • a frame for receiving and holding the stencil or screen is arranged for tangential movement on and around the periphery of the drum in response to rotary or angular movement of the drum, in a manner to prevent translational displacement of the frame relative to the peripheral surface of the drum.
  • a squeegee is placed to engage the stencil adjacent the drum at the region where the stencil or screen tangentially engages the drum, the squeegee being arranged for movement to and away from the screen and the drum.
  • the squeegee structure is supported on the frame or main body of the machine by suitable means. Further, the squeegee means is positioned on the side of the stencil away from the drum and is employed to transfer colour paste to the stencil to be delivered to the material to be printed.
  • Stencil or silk screen printing machines of the aforementioned type are known to the art and are con structed for relatively high printing speed. It has been discovered in practice, however, that there is a limit to the speed at which such machines can perform printing work. This is primarily due to the fact that the printing speed is dependent on the speed at which the drum operates during a printing sequence, and thus the drum operating speed must be well adjusted in order to obtain a good printing result. Since the mechanism used to drive the drum during a printing sequence is also utilized to return the drum to the starting position, the total printing time is the sum of the two periods of time one period taken to effect a printing sequence, and the other period to return the drum to its starting position, the time taken for each being the same.
  • the object of the present invention is to provide an adjustable mechanism for controlling and regulating the angular movement of the drum.
  • means are provided whereby angular movement of the drum can be adjusted to a pre-determined magnitude, which preferably only slightly exceeds, but which, in general, substantially corresponds to the length of the material to be printed.
  • a pre-determined magnitude which preferably only slightly exceeds, but which, in general, substantially corresponds to the length of the material to be printed.
  • the invention is directed to the combination in which means are provided for adjusting the angular movement of the conventional drum to relate the length of a peripheral movement of the drum to the length of the material to be imprinted. Therefore, only that adjusting mechanism is shown and explained, in relation to the drum and screen frame.
  • the drawing illustrates in simplified form and diagrammatically a stencil printing machine or silk screen machine employing a reciprocatingly rotatable drum or shell 1.
  • a suitable means 2 for holding the edge portion of the material 3 to be printed.
  • a frame 4 is provided to hold a stencil 5 and is preferably arranged for linear movement along the periphery of the drum 1 in response to rotation of the drum.
  • This coordination of movement is known per se, and is not indicated in the accompanying drawing.
  • such arrangements normally comprise a rack (not shown) which extends along the: frame and co-acts with a pinion wheel (not shown) arranged on the drum 1.
  • a squeegee means 6 is disposed to engage the screen wipingly behind the tangential region of engagement of the screen with the drum, during the printing or forward movement and operation of the screen, and the squeegee is controlled to be retracted from the screen during the return movement of the screen to its initial starting position.
  • the squeegee is illustrated in the drawing occupying the printing positions.
  • a colour paste filling means 7 Located immediately adjacent the squeegee 6 is a colour paste filling means 7, which is also mounted for movement to and away from the screen.
  • the drum 1 is mounted for rotation around a centre shaft 10, onto which is mounted a gear 11.
  • the gear 11 meshes with a toothed arc 12 connected with and carried by a segment 13 which is mounted for pivotal angular oscillation on a shaft 14.
  • the segment 13 carries a bearing pin means 16 located between the toothed are 12 and the shaft 14.
  • the bearing pin 16 pivotally supports one end of a connecting rod 15, and the other end, 1512. of the rod 15. is pivoted on a second bearing pin 17 supported on a bracket 18 adjustably positionable on an arcuate lever arm 19 to vary the angular throw of the segment 13 to control the angular movement of the drum.
  • the arcuate lever arm 19 preferably of rectangular cross section, has one end 19b mounted for pivotal movement around a pin 20.
  • the bracket 18 is constructed so that it can be securely fixed to the bar 19 at any position therealong, to which it is adjusted.
  • the end 19b of the lever arm 19 is securely mounted to one end 21a of a crank arm 21, also mounted for pivotal movement about said pin 20.
  • the other end 21b of crank arm 21 is provided with a bearing pin 22 that pivotally supports one end 23a of a connecting crank rod 23, the other end 23b of which is pivotally supported on a crank pin 24, at the end of a crank 25.
  • the crank 25 is secured to a rotatable shaft carrying a toothed wheel 26 driven by a transmission means 27 from an electric motor 28, the output shaft 28 of which drives a gear 29 for the belt 27.
  • crank 25 of the illustrated embodiment is assumed to be driven at a constant speed.
  • the transmission means 27 in the illustrated embodiment is shown in the form of a chain drive (the chain being shown in morse lines. in the drawing), it will readily be perceived that the transmission chain 27 can be in the form of a belt drive or similar drive, while at the same time the crank 25 may be driven at different speeds, for example by means of a speed change gear.
  • the means 18 is securely mounted to the bar in any selected setting position by means of known arrangements.
  • the mechanism operates in the following manner: Since the crank 25 is arranged to rotate at a selected speed, the arm will impart to the toothed are 12 an angular movement via the connecting rods 23 and 21 and the lever 19. The magnitude of the angular movement of the segment 13 is dependent on the location of the bracket 18 on the lever 19. Thus the effective length of lever 19, as a radius lever around pin 20, determines the throw at pin 16 and the angular movement of segment 13. Further, the lever is arcuate in shape with the radius of the arc corresponding substantially to the length of the connecting rod 15. The axis of pin 16 is the centre of the are represented by the bar 19, when the device is in the shown position that is the starting position.
  • This arrangement ensures that the holding means 2, for holding the edge portion of the material 3 to be, always constantly takes a predetermined position in relation to the squeegee 6 and the stencil 5, irrespective of the position in at which the bracket 18 is set along the arcuate lever 19.
  • a stencil printing machine comprising:
  • said drum being mechanically coupled to said frame to impart translatory movement thereto in opposite directions corresponding to the direction of the oscillatory movement of the drum;
  • coupling means for mechanically linking said motor to said drum to turn the latter first in one direction for a printing operation and then in reverse direction to a predetermined starting position so as to cause each printing operation to commence from the same starting position;
  • said adjusting means comprising i. a gear ring mounted co-axially with said drum; ii. a pivoted sector member having a toothed are engaging said gear ring;
  • a connecting rod having one end connected to said arcuate lever, the other end being connected to said sector member for oscillating said drum;
  • v. crank means driven by said motor and connected to said lever shaft to turn the pivoted end of the lever in a hypothetical sector are of a predetermined angle
  • connecting rod being adjustable on said arcuate lever to a position which corresponds to the axis of said sector arc;
  • the length of the arm of said connecting rod in said adjusted position being equal to the length of the radius of said sector arc.
  • a stencil printing machine in which a squeegee is mounted above the drum to engage the stencil in the region where the stencil tangentially engages the drum and which squeegee is mounted for movement to and away from the stencil and the drum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
US266598A 1971-07-08 1972-06-27 Silk screen printing machine having variable printing length Expired - Lifetime US3915088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE08833/71A SE353489B (de) 1971-07-08 1971-07-08

Publications (1)

Publication Number Publication Date
US3915088A true US3915088A (en) 1975-10-28

Family

ID=20275146

Family Applications (1)

Application Number Title Priority Date Filing Date
US266598A Expired - Lifetime US3915088A (en) 1971-07-08 1972-06-27 Silk screen printing machine having variable printing length

Country Status (6)

Country Link
US (1) US3915088A (de)
JP (1) JPS5122419B1 (de)
DE (1) DE2230261C2 (de)
GB (1) GB1365636A (de)
IT (1) IT961329B (de)
SE (1) SE353489B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193344A (en) * 1976-09-28 1980-03-18 Svecia Silkscreen Maskiner Ab Silk screen printing machine
US4524688A (en) * 1983-05-24 1985-06-25 Johannes Zimmer Wiper assembly for flat-screen printer
US4905985A (en) * 1988-05-02 1990-03-06 Sakura Seiki Co., Ltd. Cam operated gripper for a printing press
US4919043A (en) * 1988-10-04 1990-04-24 American Screen Printing Company Web tech drive assembly for stencil carriage
US4958559A (en) * 1988-10-04 1990-09-25 American Screen Printing Company Cylinder press drive assembly
US5265533A (en) * 1989-04-10 1993-11-30 Svantesson Ake Stencil printing machine
US9352546B2 (en) * 2014-08-21 2016-05-31 Atma Champ Ent. Corp. Servo-driven cylinder screen printing machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969113C (de) * 1942-09-29 1958-04-30 Siemens Ag Anordnung zum Behandeln, beispielsweise Erhitzen, eines Gutes durch die Einwirkung eines elektrischen Hochfrequenzfeldes

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1549533A (en) * 1923-05-19 1925-08-11 Claude L Friel Bed and cylinder press
US1832216A (en) * 1930-02-10 1931-11-17 Selectasine System Inc Stencil printing machine
US2105328A (en) * 1936-12-30 1938-01-11 Frederick R Molitor Reciprocating bed motion for flat bed presses
US2581775A (en) * 1948-09-04 1952-01-08 Louis R Wade Screen printing machine
US2606492A (en) * 1948-06-12 1952-08-12 James A Black Silk screen stenciling machine
US2702001A (en) * 1951-11-30 1955-02-15 Gattuso Henry Andrew Stenciling apparatus with variable printing stroke
US2866404A (en) * 1956-02-15 1958-12-30 Stork & Co S App Utfabriek N V Machine for screen printing stepwise movable webs of cloth

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2005101C3 (de) * 1970-02-04 1981-04-02 Albert-Frankenthal Ag, 6710 Frankenthal Vorrichtung zum Führen eines Bogens oder Bedruckstoffes in einer Siebdruckmaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1549533A (en) * 1923-05-19 1925-08-11 Claude L Friel Bed and cylinder press
US1832216A (en) * 1930-02-10 1931-11-17 Selectasine System Inc Stencil printing machine
US2105328A (en) * 1936-12-30 1938-01-11 Frederick R Molitor Reciprocating bed motion for flat bed presses
US2606492A (en) * 1948-06-12 1952-08-12 James A Black Silk screen stenciling machine
US2581775A (en) * 1948-09-04 1952-01-08 Louis R Wade Screen printing machine
US2702001A (en) * 1951-11-30 1955-02-15 Gattuso Henry Andrew Stenciling apparatus with variable printing stroke
US2866404A (en) * 1956-02-15 1958-12-30 Stork & Co S App Utfabriek N V Machine for screen printing stepwise movable webs of cloth

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193344A (en) * 1976-09-28 1980-03-18 Svecia Silkscreen Maskiner Ab Silk screen printing machine
US4524688A (en) * 1983-05-24 1985-06-25 Johannes Zimmer Wiper assembly for flat-screen printer
US4905985A (en) * 1988-05-02 1990-03-06 Sakura Seiki Co., Ltd. Cam operated gripper for a printing press
US4919043A (en) * 1988-10-04 1990-04-24 American Screen Printing Company Web tech drive assembly for stencil carriage
US4958559A (en) * 1988-10-04 1990-09-25 American Screen Printing Company Cylinder press drive assembly
US5265533A (en) * 1989-04-10 1993-11-30 Svantesson Ake Stencil printing machine
US9352546B2 (en) * 2014-08-21 2016-05-31 Atma Champ Ent. Corp. Servo-driven cylinder screen printing machine

Also Published As

Publication number Publication date
SE353489B (de) 1973-02-05
GB1365636A (en) 1974-09-04
DE2230261A1 (de) 1973-01-25
DE2230261C2 (de) 1982-10-07
JPS5122419B1 (de) 1976-07-09
IT961329B (it) 1973-12-10

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