EP0453989A1 - Dispositif de sérigraphie avec un support cylindrique à commande réversible - Google Patents
Dispositif de sérigraphie avec un support cylindrique à commande réversible Download PDFInfo
- Publication number
- EP0453989A1 EP0453989A1 EP91106318A EP91106318A EP0453989A1 EP 0453989 A1 EP0453989 A1 EP 0453989A1 EP 91106318 A EP91106318 A EP 91106318A EP 91106318 A EP91106318 A EP 91106318A EP 0453989 A1 EP0453989 A1 EP 0453989A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- sheet
- screen printing
- feeder
- pad
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
-
- 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 invention relates to a screen printing device with a reversibly driven cylindrical printing pad, a movable screen and a fixed squeegee for printing on printing material in sheet form.
- a printing sheet is automatically guided from a preliminary system with its printing sheet leading edge against the gripper and / or register edges of the cylinder, the cylinder not standing still, but rather moving towards the sheet.
- Print sheet leading edge and cylinder gripper and / or pass register edges meet at a relatively high, opposing speed.
- the sheet infeed must therefore be adjusted to the properties of the substrate sheet, e.g. by the upstream system is changed or the registers on the cylinder are moved accordingly or the speed of the machine is changed.
- the object of the invention is to provide a screen printing device with a reversibly driven cylindrical printing pad create a pass-proof, shock-free creation of a printing sheet, so that setup work can be omitted, especially with changing printing material properties and / or changing machine speeds.
- the drive of the screen printing device according to the invention has a toothed segment 1, which is known per se and oscillates around a shaft 2 in the double arrow direction 3, and which is moved by a crank mechanism 4, known per se and rotating about an axis 10, with one end thereof a pin 5 engages the toothed segment 1 and is supported with its other end on the machine frame (not shown).
- the toothed segment meshes with a toothed wheel section 8 a toothed wheel the printing pad 6 in the form of a cylinder or a cylinder segment - hereinafter called the printing cylinder 6 - which is driven in the double arrow direction 7 in a reversing manner about the axis 9.
- a screen frame 22 driven in the double arrow direction 21 and a fixed doctor blade device 23 are arranged above the printing cylinder 6.
- a plurality of grippers 11 which are rotatable about a shaft 18 and which are operated by a cam disk 19 according to a particular embodiment of the invention are arranged in a jacket line.
- the cam disc 19 is seated with a drive gear 12 freely rotatable on the axis 9 of the pressure cylinder 6, the drive gear 12 being wrapped in an endless drive chain 13, which otherwise wraps around a crankshaft gear 14 which is seated on the axis 10 of the crank drive 4 and with the crank mechanism circulates.
- a cam 15 is arranged on the cam track of the cam disk 19, a roller 16 of a gripper lever 17 rolling on the cam track, which is arranged on the rotary shaft 18.
- the cam disk 19 is driven continuously by the drive chain 13 in the direction of the arrow 20.
- the height, length and leading edges of the cam 15 are designed such that a relatively smooth and long-term or long-stroke gripper movement results therefrom.
- the gripper movement is coupled with the reversing movement of the cylinder, so that only a very short, abrupt gripper movement can result, which not only complicates the exact gripping of the sheet to be printed, but can also cause damage to the leading edge of the sheet. With known solutions, increased wear occurs in this area.
- the described gripper actuation device is not only particularly useful for a printing device according to the invention, but generally for screen printing devices with reversing Printing cylinder is more suitable than the known, short-stroke gripper actuation devices, which are subject to the specified defects and are coupled with the reversing movement.
- the screen printing device has an advance device 24 which is directed obliquely upwards to the printing cylinder 6 and which automatically transfers a sheet to the grippers 11.
- the pre-application device 24 is coupled in terms of movement to the reversing movement of the pressure cylinder 6. This movement coupling provides that the opened grippers take over a bow from the pre-application device 24.
- the takeover takes place during a movement in the same direction or in the same direction as the grippers 11 or the pressure cylinder 6 and the pre-application device 24.
- this movement in the same direction between the pressure cylinder 6 and the pre-application device 24 is ensured by mechanical means.
- the mechanical means have a roller block 25 which is fixed laterally on the pressure cylinder 6 and which projects beyond the lateral surface of the cylinder and which takes part in the movement of the pressure cylinder the pre-application device 24 outstanding plunger 27 with a front abutting edge 28.
- the arrangement of these mechanical means is selected so that the roller 26 abuts the abutting edge 28 when the grippers 11 are open and the pre-application device 24 is at a standstill, and shortly before the cylinder 6 is at a standstill.
- the pre-application device 24 becomes pushed back until the cylinder 6 has come to a standstill.
- the front edge of the printed sheet comes gently against, for example, register systems of the cylinder 6 and under it closing gripper 11.
- a damaging impact of the sheet on the grippers 11 and / or on the register contact edges of the cylinder 6 is thus ruled out.
- the movement path of the feeder device 24 imposed by the cylinder 6 in the same direction is only a few millimeters, for example 3 mm. During this path, the grippers can close gently due to the shape of the cam 15 and clamp the bow.
- a feeder device 24 for the purposes of the invention has a printed sheet transport carriage 29 as the feed table, the wheels 30 of which roll on rails 31 which are supported on the machine frame 32.
- a stop web 33 under the carriage abuts against a stop 34 arranged on the machine frame 32 when the carriage 29 has reached its foremost position. Against this stop, it is pulled by a tension spring 35 which sits at one end on a retaining web 36 arranged under the carriage 29 and at the other end on the machine frame 32.
- the tension spring 35 automatically pulls the carriage 29 back to its foremost position after the movement in the same direction has ended, in which it abuts the stop 34 with its stop web 33.
- the carriage 29 is manually covered with a printed sheet which is pushed against a rear registration mark 34 and can be taken over by the grippers of the printing cylinder from this position.
- a pre-feed device 24 with an automatically working sheet feeder 38 with transport belt 42 is shown.
- a gap 39 is provided between the sheet feeder 38 and the carriage 29, which allows a relative movement between the sheet feeder 38 and the carriage 29.
- the surface of the carriage 29 is at least partially from side to side arranged upper run 40 formed by endless and driven conveyor belts 41.
- the transport belts 42 convey a sheet onto the transport belts 41, which convey the sheet against pre-positioning webs 43 of a hold-down plate 44 arranged above the carriage 29, which are arranged next to one another in a gap.
- the front edge of the printing sheet comes against cylinder fitting contact bars 45 arranged laterally between gaps 43 and under the grippers 11.
- the hold-down plate 44 is raised in the direction of arrow 46 while the grippers 11 close.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Screen Printers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9004739U | 1990-04-26 | ||
DE9004739U DE9004739U1 (de) | 1990-04-26 | 1990-04-26 | Siebdruckvorrichtung mit reversierend angetriebener zylindrischer Druckunterlage |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0453989A1 true EP0453989A1 (fr) | 1991-10-30 |
Family
ID=6853238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91106318A Withdrawn EP0453989A1 (fr) | 1990-04-26 | 1991-04-19 | Dispositif de sérigraphie avec un support cylindrique à commande réversible |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0453989A1 (fr) |
JP (1) | JPH04229264A (fr) |
DE (1) | DE9004739U1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114132060A (zh) * | 2021-11-29 | 2022-03-04 | 深圳市明正宏电子有限公司 | 一种高效丝印文字丝印辅助工具 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1126414B (de) * | 1957-11-28 | 1962-03-29 | William Philip Mccormick | Siebdruckmaschine |
US4509422A (en) * | 1982-04-01 | 1985-04-09 | Sakurai Machine Trading Co., Ltd. | Paper discharger in cylinder screen printing machine |
US4905985A (en) * | 1988-05-02 | 1990-03-06 | Sakura Seiki Co., Ltd. | Cam operated gripper for a printing press |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2043823A1 (de) * | 1970-09-04 | 1972-03-09 | Rehmus, Kurt, 2000 Hamburg | Siebdruckmaschine |
-
1990
- 1990-04-26 DE DE9004739U patent/DE9004739U1/de not_active Expired - Lifetime
-
1991
- 1991-04-19 EP EP91106318A patent/EP0453989A1/fr not_active Withdrawn
- 1991-04-26 JP JP9753391A patent/JPH04229264A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1126414B (de) * | 1957-11-28 | 1962-03-29 | William Philip Mccormick | Siebdruckmaschine |
US4509422A (en) * | 1982-04-01 | 1985-04-09 | Sakurai Machine Trading Co., Ltd. | Paper discharger in cylinder screen printing machine |
US4905985A (en) * | 1988-05-02 | 1990-03-06 | Sakura Seiki Co., Ltd. | Cam operated gripper for a printing press |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114132060A (zh) * | 2021-11-29 | 2022-03-04 | 深圳市明正宏电子有限公司 | 一种高效丝印文字丝印辅助工具 |
Also Published As
Publication number | Publication date |
---|---|
JPH04229264A (ja) | 1992-08-18 |
DE9004739U1 (de) | 1991-09-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT NL SE |
|
17P | Request for examination filed |
Effective date: 19920430 |
|
17Q | First examination report despatched |
Effective date: 19931006 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SPS SCREEN PRINTING SYSTEMS GMBH |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19941008 |