EP0521011A1 - Process for guiding a sheet of paper in a colour-tape cassette, and a colour-tape cassette for carrying out the process. - Google Patents
Process for guiding a sheet of paper in a colour-tape cassette, and a colour-tape cassette for carrying out the process.Info
- Publication number
- EP0521011A1 EP0521011A1 EP91905555A EP91905555A EP0521011A1 EP 0521011 A1 EP0521011 A1 EP 0521011A1 EP 91905555 A EP91905555 A EP 91905555A EP 91905555 A EP91905555 A EP 91905555A EP 0521011 A1 EP0521011 A1 EP 0521011A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- ribbon cassette
- elevation
- area
- cassette according
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J17/00—Mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper
- B41J17/32—Detachable carriers or holders for impression-transfer material mechanism
Definitions
- the invention relates to a method for guiding a sheet in an ink ribbon cassette, in which the sheet coming from an Elatt exit point of a pressure body is returned in a sheet guide channel with a curved deflection area to a sheet entry point of the pressure body, the sheet being concave as seen in the sheet guide direction Surface of the deflection area is guided.
- a sheet conveyed from a sheet supply is transferred through an opening into an ink ribbon cassette to a sheet entry point of a pressure element designed as a pressure roller.
- the sheet is then guided past a recording head with the interposition of a first ink ribbon section of an ink ribbon stored in the ink ribbon cassette, a color transfer from the first ink ribbon section to the sheet taking place in accordance with the control of the recording head.
- the sheet printed in this way with a first color emerges at a sheet exit point of the pressure body and is again guided in a sheet guide channel with a curved deflection area up to the sheet entry point of the pressure body in order, with the interposition of further, different ribbon sections of the ink ribbon again at the To be guided past the recording head.
- colorful records can be applied to the sheet by mixing different colors, or recordings with a very fine color gradation can be obtained when using ribbon sections of different optical density.
- an exact positioning of the sheet in relation to the sheet entry point of the pressing body in the repeated feeds is necessary. Positioning errors are disruptive in the form of color falsifications or the submission of color gradations that do not correspond. noticeable.
- the object of the invention is to improve the positioning accuracy of a sheet fed several times to a pressure element in the ribbon cassette with respect to the sheet entry point using simple constructional means.
- This object is achieved according to the invention in a method of the type mentioned at the outset in that the sheet is guided in sections which can be tilted transversely to the sheet guiding direction by means of an elevation on the concave surface and that, seen in the sheet guiding direction, a force acting transversely to the sheet guiding direction after the elevation on the sheet is exercised by means of which the sheet is aligned with a side edge on a sheet guiding surface.
- the curvature of the sheet in the curved deflection area causes a significant reduction in the relevant for the sheet alignment felicitnträgheitsmo ⁇ mentes of the sheet, so that with surprisingly low 'expenditure of force displacement first of the leading edge of the sheet and subsequently of the further blade sections transverse direction to Blatt Operations ⁇ is provided ; an approximately vertical displacement of the leading sheet edge (seen in the sheet guiding direction) or the subsequent sheet areas to the sheet guiding direction is made possible by the sheet being lifted at least in sections from the concave surface of the sheet guiding channel which limits the sheet guiding channel to the outside, because the sheet is raised by the elevation obtains a considerably increased mobility transversely to the sheet guiding direction and an additional rotary degree of freedom (tilting movement around the elevation) essentially around the axis of the sheet guiding direction in the area of the elevation; furthermore, the bending stiffness of the sheet, which is essential for the tilting movement, is considerably increased by the curvature.
- a particularly precise alignment of the blade can be achieved according to an advantageous development of the method according to the invention in that the blade is deflected by at least 170 ° between the elevation on the concave surface and the area of the application of force.
- an ink ribbon cassette for carrying out the method according to the invention with a sheet guiding channel running between a sheet exit point and a sheet entry point of a pressure body, with a curved deflection area, according to the invention, a sheet guiding surface laterally delimiting the sheet guiding channel, and a sheet guide surface arranged on the concave surface of the deflection area. Elevation projecting into the sheet guide channel and at least one conveying roller, seen in the sheet guide direction after the elevation, which exerts a force acting on the sheet in the direction of the sheet guide surface.
- the alignment of the sheet located in the sheet guide channel on the sheet guide surface is in cooperation with the elevation which is arranged on the concave surface of the deflection region and projects into the sheet guide channel. of the conveying roller, because the elevation lifts the sheet from the concave surface and thus increases the lateral mobility of the sheet and increases ,
- tape cassette in a further region which is curved in opposite directions with respect to the deflection region and is adjacent to the deflection region.
- a particularly precisely defined tilting movement in the rotational degree of freedom is brought about by the fact that the deflection area has a comparatively strong curvature on its sheet entry side and that the elevation is arranged 30 in the area of the strong curvature.
- the elevation is arranged approximately in the center with respect to the width of the sheet which runs transversely to the sheet guiding direction. So sin ⁇ advantageously asymmetrical tilting movements of the Leaf and thus asymmetrical forces or moments prevented.
- a structurally particularly simple embodiment of the ink ribbon cassette according to the invention provides that the elevation is a rib running longitudinally to the sheet guiding direction.
- the elevation is at least one freely rotating friction roller with an approximately linear friction surface. Due to the approximately linear friction surface, the alignment process of the sheet is not hindered by the friction roller.
- the conveying roller is arranged centrally on a driven shaft and that the shaft with the sheet guiding surface laterally delimiting the sheet guiding channel has an angle as seen in the sheet guiding direction less than 90 ".
- An angle of 84" to 84.5 * has proven to be particularly advantageous.
- the elastically deformable conveyor roller can penetrate a guide surface of the sheet guide channel by a few tenths of a millimeter, preferably 0.7 mm. 1
- the diameter of the conveyor roller is larger than the width of the conveyor roller. In this way, a hindrance to rotational alignment
- the sheet guide channel is in the area
- the high positioning accuracy of a sheet that is repeatedly fed to the sheet entry point which can be achieved with the ink ribbon cassette according to the invention, can be further used to increase the recording quality, according to another
- the pressure body is a pressure roller and which extends from one sheet from the sheet entry point through the sheet exit point and the sheet guide channel to the next
- 30 sheet length is an integer multiple of the printing roller circumference. This suppresses the influence of runout errors of the printing roller (pump effect) on the recording result, because in this way a relative displacement between the sheet and the printing roller peripheral surface during subsequent recording
- sheets are individual record or information carriers, such as, for. B. sheets of paper, foils, forms and cards to understand.
- FIG. 1 shows an exemplary embodiment of an ink ribbon cassette for carrying out the method according to the invention in section
- FIG. 2 shows a detail of FIGS
- Figure 3 is a view along section III-III of Figure 1.
- FIG. 1 shows a housing 1 of an ink ribbon cassette, in which a pressure body 2 designed as a pressure roller is rotatably mounted.
- the housing 1 also contains a heat-sensitive ink ribbon 5, which is pre-wound on coils 3 and 4 and which partially wraps around the printing roller.
- the winding 3 is 'ben umge ⁇ 6, the rear-Reina vertically in conjunction with a number of the drawing plane of figure 1' of a baffle Direction arranged housing rib 8 serves as a guide channel 9 for an entering direction of the arrow 10 in the housing 1 sheet.
- the sheet 11 is conveyed by a stack of storage, not shown, which is located in a printer housing 15, which is only shown in a hint.
- the printer housing 15 and the housing 1 complement each other to form a total housing 16.
- the guide channel 9 opens into a sheet entry point 21 of the pressure body 2 designed as a pressure roller, on which the sheet 11 with its (in the direction of rotation 22 of the pressure roller) trained pressure body 2 defined sheet guide direction seen) leading edge comes into contact with the pressure body 2.
- a region 32 of the sheet guide channel 30 is formed by a guide plate 33 in cooperation with a number of ribs 34 which define a guide surface and are arranged in series with respect to the image plane of FIG. 1.
- a region 35 is adjoined by a deflection region 35 which is partially formed by a switch 36 which has a cruciform basic structure 37; the basic structure 37 is reinforced by ribs 40 and 41 arranged in parallel in the drawing plane of FIG. 1 and running parallel.
- the deflection region 35 of the sheet guide channel 30 is thus bounded on the outside by a concave surface 42 seen in the sheet guide direction, which in turn is formed by edges 4'3 of the ribs 40 and edges of further ribs 50 arranged in the housing 1.
- the entire sheet guide channel 30 is delimited by a molded part 52, which, in addition to the ribs 34, has further reference to the
- the deflection region -35 has the smallest radius of curvature in the region of the ribs 40, i. H. the strongest curvature.
- FIG. 2 illustrates the structure of the switch 36, the individual ribs 40 being particularly clearly recognizable; In the middle area of the switch 36 there is a raised rib 60, the height of which exceeds the height of the other ribs by 0.7 mm.
- the switch 36 has bearing journals 61 and 62 and an element 63 provided for actuating the switch 36.
- a conveyor roller 7G is arranged on a shaft 71 on the ribs 40 and thus approximately in the region of the greatest curvature - that is, after approximately 180 ° of the deflection region 35.
- the conveyor roller 70 is dimensioned such that it engages 0.7 mm deep between the parallel ribs 50. Sicn closes at the deflection area 35 an approximately flat section 73 of the sheet guide channel 30, which extends to the sheet entry point 21.
- a resilient plate 75 is arranged, through which the sheet guide channel 30 tapers in the area of the sheet entry point 21.
- the switch 36 can be moved in the direction of rotation 78 up to a stop (not shown) by actuating the element 63 (FIG. 2).
- the printer housing 15 has a sheet storage surface 80, on which a sheet transported out of a ribbon cassette by a guide channel 81 can be deposited.
- Figure 3 shows (shown rotated by 90 °) a section of Figure 1 along the line III-III; to simplify the ribs 9 and cut-away portions 83 are the ribs 50 and the winding not shown with the ink ribbon 5 3 and 4 in the Figure 3 "cut-free parts 82nd Like elements are with the already assigned in the figure 1, reference numerals Partially recognizable are the parallel ribs 50 of the housing 1, which together with the ribs 53 form the deflection area 35 of the sheet guide channel 30.
- a sheet 90 located in this area is indicated, the front area of which has been torn off for reasons of clarity of illustration
- This (torn off) area of the sheet 9C would be in contact with the conveyor roller 70 and would be conveyed along under the end area of the guide plate 6 and the resilient sheet 75 until it comes into contact with its leading edge again at the sheet entry point 21 the pressure body 2.
- the conveyor roller 70 is via a gear 91 and three further gear wheels 93, 94 and 95 engages with a drive gear 96 of the pressure body 2 designed as a pressure roller and is thus driven in the same direction of rotation as the pressure roller.
- the width of the conveyor roller 70 is dimensioned much smaller than its diameter. 1
- a sheet reaching the housing 1 in the direction of the arrow 10 (FIG. 1) is conveyed through the guide channel 9 to the sheet entry point 21 of the pressure body 2 and then by the rotation of the pressure body 2 designed as a pressure roller,
- thermal transfer printing here is merely an example of many other printing processes in which the method according to the invention or the invention Ribbon cassette can be used.
- the ribbon has 5 differently colored sections, the length of which is matched to the length of the sheet 11.
- the sheet 11 is first passed through the area 32 and thereby subjected to a (left-hand) curvature.
- the sheet 11 experiences a curvature in the opposite direction and thus lies against the concave outer surface 42.
- the blade 11 is protruded by the projecting rib 60 (FIG. 2) from the concave surface 42 of the umler formed by the other ribs 40.
- Rib 60 caused a rotational degree of freedom transversely to the direction of sheet guidance enables an approximately parallel displacement of the leading edge or sheet surface perpendicular to the direction of sheet guidance.
- the sheet 11 leads around the raised rib 60
- the switch 36 is moved in the direction of rotation 78 by means of the element 63, so that the sheet 11 reaches the sheet depositing surface 80 along the guide channel 81 .
Landscapes
- Impression-Transfer Materials And Handling Thereof (AREA)
Abstract
Si plusieurs applications de couleur successives doivent être effectuées sur la même face d'une feuille de papier, la feuille venant de la sortie papier d'un élément de pression est renvoyée, par un canal de guidage comportant une zone de changement de direction incurvée, à l'entrée papier de l'élément de pression. Pour obtenir une bonne qualité d'application des couleurs, il est nécessaire que la mise en place de la feuille soit extrêmement précise. Afin de garantir l'alignement précis de la feuille (11) introduite à plusieurs reprises, ladite feuille est guidée au moyen d'une zone surélevée (60) sur la surface concave (42) de la zone de changement de direction (35) de manière à ce qu'elle bascule par paliers perpendiculairement à la direction de déplacement. En aval de la zone surélevée (60), par rapport à la direction de déplacement, une force est exercée sur la feuille à angle droit par rapport à la direction de déplacement, ladite force alignant la feuille (11) avec l'arête latérale d'une surface de guidage des feuilles (100). Impression multicolore.If several successive color applications are to be carried out on the same face of a sheet of paper, the sheet coming from the paper outlet of a pressure element is returned, by a guide channel comprising a curved direction change zone, at the paper inlet of the pressure element. To obtain a good quality of application of the colors, it is necessary that the positioning of the sheet is extremely precise. In order to guarantee the precise alignment of the sheet (11) introduced several times, said sheet is guided by means of a raised area (60) on the concave surface (42) of the change of direction area (35) of so that it rocks in steps perpendicular to the direction of travel. Downstream of the raised area (60), relative to the direction of movement, a force is exerted on the sheet at right angles to the direction of movement, said force aligning the sheet (11) with the lateral edge d 'a sheet guide surface (100). Multicolored print.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4009293A DE4009293A1 (en) | 1990-03-20 | 1990-03-20 | METHOD FOR LEADING A SHEET IN A RIBBON CASSETTE AND RIBBON CASSETTE FOR CARRYING OUT THE METHOD |
DE4009293 | 1990-03-20 | ||
PCT/DE1991/000240 WO1991014579A1 (en) | 1990-03-20 | 1991-03-18 | Process for guiding a sheet of paper in a colour-tape cassette, and a colour-tape cassette for carrying out the process |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0521011A1 true EP0521011A1 (en) | 1993-01-07 |
EP0521011B1 EP0521011B1 (en) | 1994-05-18 |
Family
ID=6402855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91905555A Expired - Lifetime EP0521011B1 (en) | 1990-03-20 | 1991-03-18 | Process for guiding a sheet of paper in a colour-tape cassette, and a colour-tape cassette for carrying out the process |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0521011B1 (en) |
DE (2) | DE4009293A1 (en) |
WO (1) | WO1991014579A1 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3013646A (en) * | 1961-06-12 | 1961-12-19 | Moore Business Forms Inc | Paper guides |
GB1189709A (en) * | 1967-10-19 | 1970-04-29 | Creed & Co Ltd | Improvements in Web Feeding Apparatus. |
JPS56122747A (en) * | 1980-02-27 | 1981-09-26 | Ricoh Co Ltd | Corrector for skew and lateral position of paper |
DE3230258C2 (en) * | 1982-08-13 | 1986-09-11 | Siemens AG, 1000 Berlin und 8000 München | Paper transport device for line printer |
DE3539526A1 (en) * | 1984-11-08 | 1986-05-07 | Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa | IMAGE GENERATION DEVICE |
JPS62132654A (en) * | 1985-12-05 | 1987-06-15 | Hitachi Ltd | Thermotransfer recorder |
DE3720417A1 (en) * | 1986-09-22 | 1988-04-07 | Siemens Ag | Image recording device |
DE3642715A1 (en) * | 1986-12-13 | 1988-06-16 | Standard Elektrik Lorenz Ag | Sheet aligning apparatus |
DE3704059A1 (en) * | 1987-02-10 | 1988-08-18 | Base Ten Systems Electronics G | Device for printing information on sheet-type data carriers, such as index cards or the like |
DE3721231A1 (en) * | 1987-06-24 | 1989-01-05 | Siemens Ag | DEVICE FOR RECORDING IMAGE INFORMATION ON A RECORDING SHEET |
DE3732853A1 (en) * | 1987-09-29 | 1989-04-13 | Siemens Ag | Switching device dependent on the direction of rotation |
DE3805367A1 (en) * | 1988-02-17 | 1989-08-31 | Siemens Ag | IMAGE RECORDING METHOD |
IT1219185B (en) * | 1988-04-08 | 1990-05-03 | Olivetti & Co Spa | PRINTING DEVICE FOR A READING AND WRITING MACHINE OF INFORMATION |
-
1990
- 1990-03-20 DE DE4009293A patent/DE4009293A1/en not_active Withdrawn
-
1991
- 1991-03-18 DE DE59101683T patent/DE59101683D1/en not_active Expired - Fee Related
- 1991-03-18 EP EP91905555A patent/EP0521011B1/en not_active Expired - Lifetime
- 1991-03-18 WO PCT/DE1991/000240 patent/WO1991014579A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9114579A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4009293A1 (en) | 1991-09-26 |
DE59101683D1 (en) | 1994-06-23 |
EP0521011B1 (en) | 1994-05-18 |
WO1991014579A1 (en) | 1991-10-03 |
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