US3901146A - Squeegee mount for independent pressure and angle adjustments - Google Patents

Squeegee mount for independent pressure and angle adjustments Download PDF

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Publication number
US3901146A
US3901146A US223856A US22385672A US3901146A US 3901146 A US3901146 A US 3901146A US 223856 A US223856 A US 223856A US 22385672 A US22385672 A US 22385672A US 3901146 A US3901146 A US 3901146A
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US
United States
Prior art keywords
squeegee
screen
supporting bar
links
edge
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
US223856A
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English (en)
Inventor
Gerard Stierlein
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.)
Alsacienne de Constructions Mecaniques SA
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Alsacienne de Constructions Mecaniques SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/44—Squeegees or doctors

Definitions

  • One of the ends of the links is rigidly connected to the bar and the other is pivotally mounted on an axis along the line of contact of the screen with the material.
  • the inclination of the links may be adjusted through two rods connectedto two simultaneously adjustable disk-cranks.
  • the free edge of the squeegee is applied against the screen by means of an inflatable tube interposed between the squeegee and its supporting bar.
  • the invention concerns more particularly the devices of the type in which the flexible squeegee is supported by a bar two ends of which are connected, respectively, to two fixed points exterior to the screen through two links, and is subjected to the action of position adjusting means, for example such as those described in French Pat. publication No. 2006 887.
  • the two ends of the bar through which the squeegee is supported are connected to the moving parts of two vertical screw jacks and they are rigidly connected to one end of the two links, the other end of which may horizontally slide in guiding members disposed substantially at the same level as the screen axis.
  • This arrangement has the disadvantage of providing only a single adjusting means, i.e., a height adjustment of the two screw jacks, so that, for each position of said screw jacks there is not only a definite angle of the edge portion of the squeegee against the screen, but also a definite pressure which cannot be varied without modifying the inclination angle of said squeegee.
  • the position of the operative edge of the squeegee against the screen cannot be accurately adjusted as desired, said position resulting from the inherent bending of the flexible squeegee in response to the position given to its supporting bar.
  • the only adjusting means available does not permit individually adjusting the pressure of the squeegee operative edge, the angle of the squeegee edge portion with the screen, and the accurate position of the squeegee edge.
  • each end of the bar which supports the squeegee is no longer rigidly. connected to one end of the link, but is rigidly connected to one end of the moving part of the corresponding vertical screw jack, the other end of which, i.e. its upper end, is pivotally mounted about a horizontal axis, while each end of said bar is pivotally mounted on one end of the corresponding link, the other end of which is also pivotally mounted on the exterior fixed point, the length of said link being adjustable.
  • Two adjusting means are thus available, i.e. a height adjustment through vertical screw jacks and a horizontal adjustment through the length adjustable link.
  • the squeegee is widely distorted and thus assumes an inherent bending resulting from the combination of said two above noted adjustments. Due to the fact that the two adjustments react upon each other, it is very difficult to impart to the squeegee a predetermined angle at the same time as a predetermined pressure, independently from each other-and, moreover, to accurately position the operative edge of the squeegee, since in any case, three parameters have to be determined whereas only two adjusting means are available.
  • the present invention has for its object the provision of a reliable device of simple construction which, however, permits an individual accurate adjustment of the squeegee pressure against the screen and of the angle of the operative edge thereof with the screen surface, all by distinct and easily operable means.
  • the device is designed in such a way that the operative edge of the squeegee is always automatically located substantially along the desired line of contact of the screen with the material, i.e. always the same, at the location where printing must take place, while through two very simple means, not reacting upon each other, the angular position of the squeegee and its pressure against the screen may be individually adjusted.
  • the two ends of the squeegee supporting are rigidly connected to one end of each link, of fixed length, the other end of which is pivotally mounted about an axis which coincides with the horizontal plane along which said screen is intended to engage with the sheet material to be printed, the operative edge of the squeegee being disposed adjacent the line of contact of the screen and the material, the adjusting means for the position of the bar consisting of simultaneous adjusting means for the angular position of the two links relative to the horizontal plane of the screen containing said line of contact, said device further comprising means for resiliently flexing the squeegee so that its operative edge is in engagement with the inner surface of the cylindrical screen coinciding with said line of contact.
  • the inclination angle of the squeegee may be conveniently adjusted by giving to the links a corresponding inclination and this without any interference with the squeegee pressure, which is adjusted through independent adjusting means.
  • the adjusting means for the squeegee pressure against the screen is in the form of an inflatable air tube arranged so as to be connected to an air supply at a suitable pressure, and interposed between the squeegee and its supporting bar.
  • FIG. 5 shows the squeegee in operative position, with the same inclination as in FIG. 4.
  • FIGS. 1 and 2 The device illustrated in FIGS. 1 and 2 is intended for adjustably supporting a squeegee 1 (see FIG. 3) inside a rotating cylindrical screen 2 for printing on sheet materials such as for example a cloth 3.
  • the location of the rotating screen 2 is immovable with respect to the machine frame 21.
  • the squeegee 1 is secured, for example, through a clamp 5 to a portion of a rectangular cross-section bar 6 disposed inside the screen and the ends of which comprise two sockets 7, 8 secured to a round bar 9 extending axially through the screen and protruding outwardly of said screen at each end thereof.
  • the two ends of bar 9 are thus supported by the upper ends of two links 12, 12A.
  • the lower end of link 12 is pivotallyv mounted about an axis 13 on the upper portion of a leg 14, the lower end of which is carried by a plate 15 secured in turn in a horizontal arm 16 of a bracket 17 integral with a tube 18 which is secured to two supports 19, 19A, fixed on frame 21 of the printing machine.
  • the reference numeral 22 indicates for illustration purposes, a supporting roller for the sheet 3 to be printed on.
  • the pivoting axis 13 for the link 12 on the leg 14 is situated substantially in alignment with the nip of roller 22 withv the cylindrical screen 2.
  • the accurate positioning of said axis is facilitated by the fact that leg 14 is vertically adjustable through means schematically illustrated in the drawings in the form of a bolt 24 which extends through a hole in the leg 14 and a vertical slot 25 in the plate 15, with the latter being also horizontally adjustable through similar means, for example,-in the form of a bolt 26 which extends through a hole in said plate and a horizontal slot 27 in the arm 16.
  • the inclination of links 12 and 12 A may be adjusted by means of two also identical devices, one of which comprises a rod 31, one end of which carries two bent fingers 32, 33 which grip the corresponding end of the round bar 9 and the other end of which is pivotally mounted on a crank pin 34 of a crank disk 35 rigidly secured to one end of a transverse shaft 36 rotatably mounted within tube 18.
  • the other end of shaft 36 carries a crank-disk 35A having a crank pin 34A for driving a rod 31A connected to the other end of the round bar 9.
  • crank-disk 35 may be conveniently adjusted through a worm 41 rotatably vertically mounted in bracket 17 and meshing with a tangential toothed wheel consisting of a toothing 42, cut for example in the edge of crank-disk 35.
  • the upper end of the worm shaft carries a knurled control knob 43 through actuation of which, the worm 41 may be selectively rotated in either direction, so as to cause rotation of the two crank-disks 35 and 35A in a corresponding direction, thus modifying the inclination of links 12 and 12A and thereafter that of squeegee supporting bar 6.
  • FIG. 3 shows the squeegee in one of its limit angular positions in which it defines with the inner surface of screen 2 a maximum angle B, while in FIG. 4, said squeegee has reached its other limit angular position in which it defines with the inner surface of screen 2 a minimum angle C.
  • the squeegee forms an angle of intermediate value between that of angles B and C of FIGS. 3 and 4, respectively.
  • the squeegee 1 which is a flexible strip secured only along its upper edge, may be applied at the desired pressure by its opposite edge against the inner surface of the screen by any suitable means which consists, in the embodiment illustrated, of an air tube 51 housed in a longitudinal groove 52 formed in the side of the rectangular bar 6 facing the squeegee.
  • any suitable means which consists, in the embodiment illustrated, of an air tube 51 housed in a longitudinal groove 52 formed in the side of the rectangular bar 6 facing the squeegee.
  • the squeegee assumes a natural planar configuration due to its inherent resiliency, whereas when air under a suitable pressure is supplied to tube 51, a deformation of the portion of the squeegee which is not squeezed between the clamp 5 and bar 6 is obtained, so that the free edge of said squeegee will bear against the inner surface of cylindrical screen 2, as shown in FIG. 5.
  • the pressure of the squeegee may be adjusted as desired by varying the value of air pressure discharge
  • the squeegee strip may be made of an elastomer, particularly of a plastic material, and preferably polyurethane; its Shore A hardness is preferably between about and 92 and its thickness is in the range of 1.5 to 5 of the free width between its free edge and the edge of clamp 5.
  • said supporting bar adjusting means comprises: two crank-disks each having a crank-pin, two further links, each further link having one end pivotally connected to the crankpin of one of said crank-disks and the other end pivotally connected to one end of said supporting bar, a horsaid squeegee.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
US223856A 1971-02-15 1972-02-07 Squeegee mount for independent pressure and angle adjustments Expired - Lifetime US3901146A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7104957A FR2125633A5 (de) 1971-02-15 1971-02-15

Publications (1)

Publication Number Publication Date
US3901146A true US3901146A (en) 1975-08-26

Family

ID=9071887

Family Applications (1)

Application Number Title Priority Date Filing Date
US223856A Expired - Lifetime US3901146A (en) 1971-02-15 1972-02-07 Squeegee mount for independent pressure and angle adjustments

Country Status (7)

Country Link
US (1) US3901146A (de)
AT (1) AT343075B (de)
CH (1) CH542055A (de)
DE (1) DE2207935A1 (de)
FR (1) FR2125633A5 (de)
IT (1) IT947548B (de)
NL (1) NL7201919A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030410A (en) * 1973-02-14 1977-06-21 Peter Zimmer Dyestuff applicator for screen printer
US4078486A (en) * 1975-02-24 1978-03-14 Fritz Buser Ag Maschinenfabrik Doctoring device with blade cushioning mount
US4232601A (en) * 1976-07-20 1980-11-11 Mitter & Co. Squeegee arrangement
US4417515A (en) * 1980-08-28 1983-11-29 Mathias Mitter Lateral support for squeegee
WO1985003672A1 (en) * 1984-02-21 1985-08-29 Lockwood Technical, Inc. Rotary screen printing apparatus
US4905591A (en) * 1987-10-09 1990-03-06 Stork Brabant B.V. Multicolor rotary screen printing machine with an improved squeegee suspension construction
US4920914A (en) * 1987-10-10 1990-05-01 Johannes Zimmer Doctoring installation and doctoring device
US5078063A (en) * 1990-12-19 1992-01-07 Ag Communication Systems Corporation Precision mechanical squeegee holding assembly
US5247882A (en) * 1991-05-10 1993-09-28 Illinois Tool Works Inc. Quick change rotary screen printing apparatus
US5388508A (en) * 1993-01-22 1995-02-14 Societe D'exploitation Des Machines Dubuit Squeegee head, in particular for silkscreen printing machines
US6477946B1 (en) * 1999-09-17 2002-11-12 Riso Kagaku Corporation Stencil printing machine
CN104842639A (zh) * 2015-05-25 2015-08-19 湖州宏鑫绸厂 一种圆网印花机的刮刀调节装置
CN111300975A (zh) * 2020-03-11 2020-06-19 长沙宁湖机械设备有限公司 一种工业钢板印花机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT363899B (de) * 1973-06-20 1981-09-10 Mitter & Co Rakeleinrichtung fuer siebdruckmaschinen
DE3784724D1 (de) * 1987-10-10 1993-04-15 Johannes Zimmer Rakelgeraet.
EP0311728B1 (de) * 1987-10-10 1993-03-10 Johannes Zimmer Rakeleinrichtung
DE9112033U1 (de) * 1991-09-23 1993-01-28 Zimmer, Johannes, Klagenfurt, Kaernten, At
DE102015208918A1 (de) 2015-05-13 2016-11-17 Koenig & Bauer Ag Rakeleinrichtung, Druckwerk sowie Verfahren zum Betreiben einer Rakeleinrichtung
DE102016206840B4 (de) 2016-04-22 2019-01-17 Koenig & Bauer Ag Druckwerk einer einen bogenförmigen Bedruckstoff bedruckenden Druckmaschine

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1566358A (en) * 1924-09-05 1925-12-22 Vickerys 1920 Ltd Doctor for paper machines
US1739264A (en) * 1924-04-24 1929-12-10 Simpson George Combined color and flock printing machine
US2295979A (en) * 1939-08-30 1942-09-15 Kimble Glass Co Stenciling machine
US2498917A (en) * 1946-09-23 1950-02-28 Gattuso Henry Andrew Stenciling apparatus
US2534320A (en) * 1946-05-16 1950-12-19 Champion Paper & Fibre Co Apparatus for coating paper
US3110919A (en) * 1961-04-12 1963-11-19 Owens Illinois Glass Co Fluid spreader
US3116688A (en) * 1959-12-23 1964-01-07 Koppers Co Inc Ink fountain
US3187718A (en) * 1962-05-28 1965-06-08 Black Clawson Co Flexible doctor blade coating apparatus
US3483819A (en) * 1967-05-18 1969-12-16 Precision Systems Co Inc Squeegee assembly for screen process printers of micro-circuits and components thereof
US3505951A (en) * 1968-06-24 1970-04-14 Kaiser Aluminium Chem Corp Screen-printing on sheet
US3650208A (en) * 1969-11-17 1972-03-21 Daryl Gene Lambert Screen printing machine with single-sided rack-and-pinion drive
US3660863A (en) * 1969-07-03 1972-05-09 Xerox Corp Cleaning apparatus
US3718086A (en) * 1969-07-09 1973-02-27 Stork Amsterdam Screen printing machine with adjustable bridge

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1739264A (en) * 1924-04-24 1929-12-10 Simpson George Combined color and flock printing machine
US1566358A (en) * 1924-09-05 1925-12-22 Vickerys 1920 Ltd Doctor for paper machines
US2295979A (en) * 1939-08-30 1942-09-15 Kimble Glass Co Stenciling machine
US2534320A (en) * 1946-05-16 1950-12-19 Champion Paper & Fibre Co Apparatus for coating paper
US2498917A (en) * 1946-09-23 1950-02-28 Gattuso Henry Andrew Stenciling apparatus
US3116688A (en) * 1959-12-23 1964-01-07 Koppers Co Inc Ink fountain
US3110919A (en) * 1961-04-12 1963-11-19 Owens Illinois Glass Co Fluid spreader
US3187718A (en) * 1962-05-28 1965-06-08 Black Clawson Co Flexible doctor blade coating apparatus
US3483819A (en) * 1967-05-18 1969-12-16 Precision Systems Co Inc Squeegee assembly for screen process printers of micro-circuits and components thereof
US3505951A (en) * 1968-06-24 1970-04-14 Kaiser Aluminium Chem Corp Screen-printing on sheet
US3660863A (en) * 1969-07-03 1972-05-09 Xerox Corp Cleaning apparatus
US3718086A (en) * 1969-07-09 1973-02-27 Stork Amsterdam Screen printing machine with adjustable bridge
US3650208A (en) * 1969-11-17 1972-03-21 Daryl Gene Lambert Screen printing machine with single-sided rack-and-pinion drive

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030410A (en) * 1973-02-14 1977-06-21 Peter Zimmer Dyestuff applicator for screen printer
US4078486A (en) * 1975-02-24 1978-03-14 Fritz Buser Ag Maschinenfabrik Doctoring device with blade cushioning mount
US4232601A (en) * 1976-07-20 1980-11-11 Mitter & Co. Squeegee arrangement
US4417515A (en) * 1980-08-28 1983-11-29 Mathias Mitter Lateral support for squeegee
WO1985003672A1 (en) * 1984-02-21 1985-08-29 Lockwood Technical, Inc. Rotary screen printing apparatus
US4627345A (en) * 1984-02-21 1986-12-09 Lockwood Technical, Inc. Rotary screen printing apparatus
US4905591A (en) * 1987-10-09 1990-03-06 Stork Brabant B.V. Multicolor rotary screen printing machine with an improved squeegee suspension construction
US4920914A (en) * 1987-10-10 1990-05-01 Johannes Zimmer Doctoring installation and doctoring device
US5063873A (en) * 1987-10-10 1991-11-12 Johannes Zimmer Doctor device
US5078063A (en) * 1990-12-19 1992-01-07 Ag Communication Systems Corporation Precision mechanical squeegee holding assembly
US5247882A (en) * 1991-05-10 1993-09-28 Illinois Tool Works Inc. Quick change rotary screen printing apparatus
US5388508A (en) * 1993-01-22 1995-02-14 Societe D'exploitation Des Machines Dubuit Squeegee head, in particular for silkscreen printing machines
US6477946B1 (en) * 1999-09-17 2002-11-12 Riso Kagaku Corporation Stencil printing machine
CN104842639A (zh) * 2015-05-25 2015-08-19 湖州宏鑫绸厂 一种圆网印花机的刮刀调节装置
CN104842639B (zh) * 2015-05-25 2018-05-01 许仙福 一种圆网印花机的刮刀调节装置
CN111300975A (zh) * 2020-03-11 2020-06-19 长沙宁湖机械设备有限公司 一种工业钢板印花机
CN111300975B (zh) * 2020-03-11 2021-09-07 瑞茂金泰(山东)智能设备制造有限责任公司 一种工业钢板印花机

Also Published As

Publication number Publication date
CH542055A (fr) 1973-09-30
FR2125633A5 (de) 1972-09-29
ATA117672A (de) 1977-09-15
DE2207935A1 (de) 1972-11-02
NL7201919A (de) 1972-08-17
AT343075B (de) 1978-05-10
IT947548B (it) 1973-05-30

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