CA1186945A - Printer comprising a guide device for a record carrier - Google Patents
Printer comprising a guide device for a record carrierInfo
- Publication number
- CA1186945A CA1186945A CA000405007A CA405007A CA1186945A CA 1186945 A CA1186945 A CA 1186945A CA 000405007 A CA000405007 A CA 000405007A CA 405007 A CA405007 A CA 405007A CA 1186945 A CA1186945 A CA 1186945A
- Authority
- CA
- Canada
- Prior art keywords
- record carrier
- transport roller
- supporting surface
- printer
- printing head
- 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
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
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/02—Platens
- B41J11/08—Bar or like line-size platens
-
- 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
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
- B41J13/14—Aprons or guides for the printing section
- B41J13/18—Aprons or guides for the printing section concentric with roller platen
Landscapes
- Handling Of Continuous Sheets Of Paper (AREA)
- Ink Jet (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
ABSTRACT:
In a printer, for example, an ink jet printer comprising a guide device for a record carrier, the record carrier is fed by means of a transport roller to an adjoining supporting surface along which a printing head is displaceable. The supporting surface extends in a plane which segmentally intersects the path of the record carrier around the transport roller. At the area of the supporting surface, a ruler presses against the record carrier without bringing it directly into contact with the supporting surface, so that the record carrier becomes S-shaped upon passage from its path around the transport roller to the supporting surface.
In a printer, for example, an ink jet printer comprising a guide device for a record carrier, the record carrier is fed by means of a transport roller to an adjoining supporting surface along which a printing head is displaceable. The supporting surface extends in a plane which segmentally intersects the path of the record carrier around the transport roller. At the area of the supporting surface, a ruler presses against the record carrier without bringing it directly into contact with the supporting surface, so that the record carrier becomes S-shaped upon passage from its path around the transport roller to the supporting surface.
Description
64'~
PHO 81.508 1 12.5.1982 "Printer comprising a guide device for a record carrier".
The invention relates to a printer comprising a guide device for transporting a record carrier, by means of a transport roller, to a strip-shaped, flat supporting surface which adjoins the transport roller by way of one its long sides, viewed in the 5 transport direction of the record carrier, and along which a printing head is displaceable, the record carrier heing pressed by a ruler frcm the side of the printing head before it reaches the area of the printing head. In a printer of this kind which is known, for example, from DE-OS
28 29 827, the record carrier should rest as flatly as possible on the l0 supporting surface in order to keep the distance between the record carrier and the printing head as constant as possible; this is important notably when the printing head is an ir~ jet printing head. In the printer which is known from said DE-OS 28 29 827, the supporting surface tangentially adjoins the transport roller and the record carrier is press-15 ed against the transport roller by means of a rule directly kefore theseparation from the transport roller. It has been found that the record carrier does not rest flatly on the supporting surface in all circum-stances in such a guide device.
It is the ohject of the invention to improve a printer OL the 20 kind set forth in order to ensure that the record carrier rests com-pletely and perfectly flatly on the supporting surface. To this end, the invention is characterized in that the supporting surface is situated in a plane which segmentally intersects the path of the record carrier around the transport roller, viewed in a cross-sectional view, thereof, 25 the ri`se of arc of the segment being smaller than half the radius -there-of, the ruler pressing against the record carrier at the area of the supporting surface without bringing the record carrier directly into contact with the supForting surface. Thar~s to these steps, record carrier becomes S-shaped at the passage from the transFort roller to 30 the supporting surface un~er influence of the forces acting on the record carrier, the record carrier subsequently resting completely and perfectly flatly on the supporting surface, so that always a constant distance between this surface and the printing head is ensured.
.~
.
P~7O 81.508 2 12 5.1982 A preferred embodiment of the printer in accordance with the invention is characterized in that the transpor-t roller comprises toroidal rings which are spaced apart in its longitudinal direction, and which define the path of the record carrier around the transport roller, the supporting surface comprising groove-shaped recesses at its long side which faces the transport rol]er, said recesses corre-sponding to the toroidal rings which project therein. The path of the record carrier around the transport roller is thus determined by the toroidal rings, because the record carrier rests only thereon. Because o the toroidal ri.ngs project into the groove~shaped recesses in the supporting surface, the supporting surface adjacent the toroidal rings extends as far as the transpor-t roller, so that at these areas the sup~
porting surface is situated slightly helow the path oE the record carrier at the passage from the transport roller to the supporting surface; this lS has a favourable effect on the formation of a smooth S-curve in the record carrier upon its passage to the supporting surface, so that the flat positioning of the record carri.er on -the supporting surface is fur-ther improved. It is to be noted that transport rollers comprising toroidal rings which are spaced apart in its longitudinal direction are known to ~e used in commercially available printers. In the akove context however, the use of such a transport roller offers sai.d special advantage that the passage of the rec.ord carrier -from the transport roller to the supporting surface is ve.ry smooth.
In view of the simplicity of the constmction, the ruler is preferahly form!ed by a bent end of a shell-like cover element which is arranged around the transport roller at a distance therefrom.
The invention will be described in detail hereinafter with refer-ence to the drawings which show two embodimen-ts in accordance with the invention.
Figure 1 is a partly diagrammatic front view of the most relevant parts of a printer comprisi.ng a transport roller with toroidal rings.
Figure 2 is a cross~sectional view of the printer shown in Figure 1.
Fi.gure 3 is a cross-sectional view of a further embodiment comprising a transport roller whose circumferential surface defines the path of a record carrier.
Figure 4 diagrammatically shows the plane of the supporting P~-IO 81O508 3 12.5.1982 surface which seg~entally intersects the path of the record carrier around the transport roller.
The reference numeral 1 in the Figures l and 2 denotes a transport roller which serves for the transport or the line-wise Eeeding of, for example, a sheet-like record carrier 2 which is shown only in Figure 2. Viewed in the transport direction of the record carrier (denoted by an arrow 3), the record carrier proceeds from a guide surface 4 to the transport roller 1 and subsequently to a strip-shaped flat supporting surface 5 along which a printing head 6, for example, an ink yet printing head is displaceable. To this end, the printing head 6 is mounted on a carrier 7 which is displaceable in the line direction on two guide rods 8 and 9. The drive for such a dis-placement of the printing head is not shown herein but may be realized in a customar~r manner, for example, by means oE a motor with a drive belt, a toothed belt or similar.
The transport roller 1 of this em~odiment comprises toroidal rings 10 which are spaced apart in its longitudinal direction and which are si-tuated in corresponding grooves; these rings are often also re-ferred to as O-rings. Because the toroidal rings 10 project from the circumferential surface of the transport roller 1, they define the path of ~he record carrier around the transport roller. T~ pressure rollers 11 and 12 which are consecutively arranged along the path of the record carrier around the transport roller co-operate with each each of the toroidal rings 10, each of said pressure rollers being journalled on 25 U-shaped supports 13 and 1~ which themselves are mDunted on a shaft 15.
The shaft 15 is supported by two levers 16 and 17 which are pivotable together about a stat~onary shaft 18, so that ~le pressure rollers can be pivoted towards and away from the toroidal rings by displacement of the levers 16 and 17. The pressure rollers 11 and 12 then pass through corresponding openings 19 and 20, respectively, which are provided in a shell-like cover element 21 which surrounds the transport roller at a distance, thus forming a guide for the record carrier 2. When the pressure rollers 11 and 12 are lifted off the toroidal rings 10, the record carrier can be slid ~y hand from the guide surface 4 and around the transport roller 1 until it reaches the supporting surface 5; it can also ke pulled out of the printer by hand. However, when the pressure rollers 11 and 1~ contact the toroidal rings 10, the record carrier is transported further by rotation of the transport roller.
PHO 81.508 4 12.5.1982 To this end, the transport roller can be rotated either b~ means of a handwheel 22 connected thereto or by means of a motor 23, via a gearwheel drive with gearwheels 24 ar.d 25.
In a printer oE this kind it is very important that the record carrier 2 rests flatly on the supporting surface 5 in order to ensure that its distance from the printing head 6 is always -the same, regard-less of the position of the head with respect to the record carrier, because printing is correct only when this distance is the same. A
constant distance between the printing head and the record carrier is required in several types of printing heads, for example, printing heads of daisy-wheel printers, stylus prin-ters or ink jet printers. Notably in the case of il~ je-t printers it is unportant that this req~lirement is satisfied, ~ecause a comparatively small, constant distance between the printing head and the record carrier is to be maintained, because otherwise the print beco~les irre~ular and incor~?lete.
In order to ensure that the record carrier rests exactly flat on the supporting surface 5, the supporting surface 5 is situated in a plane which segmentally intersects the path of the record carrier 2 around the transport roller 1, viewed in a cross-sectional view; a ruler 26 presses the record carrier at the area of the supporting surface without bringing the record carrier directly into contact with the supporting surface 5. Thus, at the passaae of the record carrier from the path around the transport roller to the supporting surface, the record carrier ~ecomes S-shaped in order to ensure that the record carrier is indeed completely flatly positioned on the surface 5 at the area cf the printing ~ead~
The segmental intersecting of the path of the record carrier around the transportroller by the plane of the supporting surface is diagra~matically shown in Figure 4, the arc of circle 27 indicating the path of the record carrier around the transport roller, whilst the stroke/dot line 28 indicates the plane of the supporting surface. The segment which is cut off is denoted by heavy lines. The position of the ruler 26 is indicated by an angle. It is clearly shown that the dimensions of the segment and the position of the ruler determine the shape of the S-shape of the record carrier 2 at its passage from the path around the transport roller to the plane of the supporting surface~
ExperimRnts have demonstrated that in order to ensure suitable flat positioning of the record carrier on the supporting surface, the rise of PMO 81.508 5 12.5.1982 h to ke one eighth of the radius rO The required position of the ruler 26 follows from the choice of the dimensions of the segment, because the ruler must ke situated at such a distance from the plane 28 of the supporting surface that the record carrier becomes (preferably lightly) S-shaped, withcut being brought directly into contact with the sup-porting surface; this is clearly shown in Eigure 4.
In the e~odiment shown in the Eigures 1 and 2, the ruler is simply formed by the bending of the end 29 of the shell-like cover element 21 which is situated near the supporting surface 5, the edge thus bent over performing the function of the ruler. The distance between the ruler 26 and the suppor~ing surface 5 can then be simply adjusted by adjustment of the shell-llke cover element.
The Figures 1 and 2 also show that at the area of its long side 30 which faces the transport roller 1 the supporting surface 5 comprises groo~e-like recesses 31 which correspond to the toroidal rings 10 and in which the toroidal rings project. The portions of the sup-porting surface 5 adjacent the toroidc~l rings thus reach as far as the transport roller 1, so that at these areas the surface is situated slightly kelow the path of the record carrier at the passage frcm the -transport roller to the surface. ~ kind of air cushion is thus formed underneath the record carrier; it has keen found that this has a parti-cularly favo~trable effect for a sm~oth S-shaped passage from the record carrier to the supporting surface, so that the flat positioning of the record carrier on the supporting surface is further enhanced.
The em~odiment shown in Figure 3 utilizes a transport roller 1 whose entire circumferential surface, ~or example, formed by a top layer of an elastic material, is used for the transport of the record carrier. Also provided are pressure rollers 11 and 12 which in this case co-operate directly with the circumferential surface of the trans-port roller 1 and which adjustable with respect thereto in the same manner as in the emkodiment shown in the Figures 1 and 2. Similarly, there is provided a shell-like cover element 21 which comprises openings 19 and 20 for the passage of the pressure rollers 11 and 12, respective-ly~ rrhe supporting surface 5 whose long side 30 adjoins the circum~
ferential surface of the transport roller 1 again extends in a plane which segm~etltally intersects the path of the record carrier around the transport roller, said path keing defined by the circumferential surface of the transport roller in said emkodiment. In said emkodimRnt a ruler 26 PI~O 81.508 6 12.5.1982 is provlded as a separate, strip-shaped component. The free end of the r~]er again presses the record carrier at the area of the supporting surface 5, ~ithout bringing the record carrier directly into contact with the suppor-ting surface.
The choice of the dimensions of the segment cut off from the path of the record carrier around the transport roller by the plane of the suppcrting surface again determines the distance bet~een the free end of the ruler 26 and the supporting surface 5 so thatuponits passage from the transport roller to the supporting surface 5 the record carrier ~ecomes S-shaped as previously descri~ed ~ith reference to Figure 4.
The record carrier 2 is thus absolutely flatly positioned against the supporting surface 5, so that it is ensured that the dis-tance between -the printing head 6 and the record carrier is always constant.
Obviously, the steps in accordance with the invention can also be taken for printers having a record carrier transport device of a type other than the descr:ibed type. For example, in the case of a record carrier c~nprising edge perforations, a drive with so-called tractors can be provided for this purpose. In suc~ a case the transport roller itself may be formed as a so-called spiked roller.
. .
PHO 81.508 1 12.5.1982 "Printer comprising a guide device for a record carrier".
The invention relates to a printer comprising a guide device for transporting a record carrier, by means of a transport roller, to a strip-shaped, flat supporting surface which adjoins the transport roller by way of one its long sides, viewed in the 5 transport direction of the record carrier, and along which a printing head is displaceable, the record carrier heing pressed by a ruler frcm the side of the printing head before it reaches the area of the printing head. In a printer of this kind which is known, for example, from DE-OS
28 29 827, the record carrier should rest as flatly as possible on the l0 supporting surface in order to keep the distance between the record carrier and the printing head as constant as possible; this is important notably when the printing head is an ir~ jet printing head. In the printer which is known from said DE-OS 28 29 827, the supporting surface tangentially adjoins the transport roller and the record carrier is press-15 ed against the transport roller by means of a rule directly kefore theseparation from the transport roller. It has been found that the record carrier does not rest flatly on the supporting surface in all circum-stances in such a guide device.
It is the ohject of the invention to improve a printer OL the 20 kind set forth in order to ensure that the record carrier rests com-pletely and perfectly flatly on the supporting surface. To this end, the invention is characterized in that the supporting surface is situated in a plane which segmentally intersects the path of the record carrier around the transport roller, viewed in a cross-sectional view, thereof, 25 the ri`se of arc of the segment being smaller than half the radius -there-of, the ruler pressing against the record carrier at the area of the supporting surface without bringing the record carrier directly into contact with the supForting surface. Thar~s to these steps, record carrier becomes S-shaped at the passage from the transFort roller to 30 the supporting surface un~er influence of the forces acting on the record carrier, the record carrier subsequently resting completely and perfectly flatly on the supporting surface, so that always a constant distance between this surface and the printing head is ensured.
.~
.
P~7O 81.508 2 12 5.1982 A preferred embodiment of the printer in accordance with the invention is characterized in that the transpor-t roller comprises toroidal rings which are spaced apart in its longitudinal direction, and which define the path of the record carrier around the transport roller, the supporting surface comprising groove-shaped recesses at its long side which faces the transport rol]er, said recesses corre-sponding to the toroidal rings which project therein. The path of the record carrier around the transport roller is thus determined by the toroidal rings, because the record carrier rests only thereon. Because o the toroidal ri.ngs project into the groove~shaped recesses in the supporting surface, the supporting surface adjacent the toroidal rings extends as far as the transpor-t roller, so that at these areas the sup~
porting surface is situated slightly helow the path oE the record carrier at the passage from the transport roller to the supporting surface; this lS has a favourable effect on the formation of a smooth S-curve in the record carrier upon its passage to the supporting surface, so that the flat positioning of the record carri.er on -the supporting surface is fur-ther improved. It is to be noted that transport rollers comprising toroidal rings which are spaced apart in its longitudinal direction are known to ~e used in commercially available printers. In the akove context however, the use of such a transport roller offers sai.d special advantage that the passage of the rec.ord carrier -from the transport roller to the supporting surface is ve.ry smooth.
In view of the simplicity of the constmction, the ruler is preferahly form!ed by a bent end of a shell-like cover element which is arranged around the transport roller at a distance therefrom.
The invention will be described in detail hereinafter with refer-ence to the drawings which show two embodimen-ts in accordance with the invention.
Figure 1 is a partly diagrammatic front view of the most relevant parts of a printer comprisi.ng a transport roller with toroidal rings.
Figure 2 is a cross~sectional view of the printer shown in Figure 1.
Fi.gure 3 is a cross-sectional view of a further embodiment comprising a transport roller whose circumferential surface defines the path of a record carrier.
Figure 4 diagrammatically shows the plane of the supporting P~-IO 81O508 3 12.5.1982 surface which seg~entally intersects the path of the record carrier around the transport roller.
The reference numeral 1 in the Figures l and 2 denotes a transport roller which serves for the transport or the line-wise Eeeding of, for example, a sheet-like record carrier 2 which is shown only in Figure 2. Viewed in the transport direction of the record carrier (denoted by an arrow 3), the record carrier proceeds from a guide surface 4 to the transport roller 1 and subsequently to a strip-shaped flat supporting surface 5 along which a printing head 6, for example, an ink yet printing head is displaceable. To this end, the printing head 6 is mounted on a carrier 7 which is displaceable in the line direction on two guide rods 8 and 9. The drive for such a dis-placement of the printing head is not shown herein but may be realized in a customar~r manner, for example, by means oE a motor with a drive belt, a toothed belt or similar.
The transport roller 1 of this em~odiment comprises toroidal rings 10 which are spaced apart in its longitudinal direction and which are si-tuated in corresponding grooves; these rings are often also re-ferred to as O-rings. Because the toroidal rings 10 project from the circumferential surface of the transport roller 1, they define the path of ~he record carrier around the transport roller. T~ pressure rollers 11 and 12 which are consecutively arranged along the path of the record carrier around the transport roller co-operate with each each of the toroidal rings 10, each of said pressure rollers being journalled on 25 U-shaped supports 13 and 1~ which themselves are mDunted on a shaft 15.
The shaft 15 is supported by two levers 16 and 17 which are pivotable together about a stat~onary shaft 18, so that ~le pressure rollers can be pivoted towards and away from the toroidal rings by displacement of the levers 16 and 17. The pressure rollers 11 and 12 then pass through corresponding openings 19 and 20, respectively, which are provided in a shell-like cover element 21 which surrounds the transport roller at a distance, thus forming a guide for the record carrier 2. When the pressure rollers 11 and 12 are lifted off the toroidal rings 10, the record carrier can be slid ~y hand from the guide surface 4 and around the transport roller 1 until it reaches the supporting surface 5; it can also ke pulled out of the printer by hand. However, when the pressure rollers 11 and 1~ contact the toroidal rings 10, the record carrier is transported further by rotation of the transport roller.
PHO 81.508 4 12.5.1982 To this end, the transport roller can be rotated either b~ means of a handwheel 22 connected thereto or by means of a motor 23, via a gearwheel drive with gearwheels 24 ar.d 25.
In a printer oE this kind it is very important that the record carrier 2 rests flatly on the supporting surface 5 in order to ensure that its distance from the printing head 6 is always -the same, regard-less of the position of the head with respect to the record carrier, because printing is correct only when this distance is the same. A
constant distance between the printing head and the record carrier is required in several types of printing heads, for example, printing heads of daisy-wheel printers, stylus prin-ters or ink jet printers. Notably in the case of il~ je-t printers it is unportant that this req~lirement is satisfied, ~ecause a comparatively small, constant distance between the printing head and the record carrier is to be maintained, because otherwise the print beco~les irre~ular and incor~?lete.
In order to ensure that the record carrier rests exactly flat on the supporting surface 5, the supporting surface 5 is situated in a plane which segmentally intersects the path of the record carrier 2 around the transport roller 1, viewed in a cross-sectional view; a ruler 26 presses the record carrier at the area of the supporting surface without bringing the record carrier directly into contact with the supporting surface 5. Thus, at the passaae of the record carrier from the path around the transport roller to the supporting surface, the record carrier ~ecomes S-shaped in order to ensure that the record carrier is indeed completely flatly positioned on the surface 5 at the area cf the printing ~ead~
The segmental intersecting of the path of the record carrier around the transportroller by the plane of the supporting surface is diagra~matically shown in Figure 4, the arc of circle 27 indicating the path of the record carrier around the transport roller, whilst the stroke/dot line 28 indicates the plane of the supporting surface. The segment which is cut off is denoted by heavy lines. The position of the ruler 26 is indicated by an angle. It is clearly shown that the dimensions of the segment and the position of the ruler determine the shape of the S-shape of the record carrier 2 at its passage from the path around the transport roller to the plane of the supporting surface~
ExperimRnts have demonstrated that in order to ensure suitable flat positioning of the record carrier on the supporting surface, the rise of PMO 81.508 5 12.5.1982 h to ke one eighth of the radius rO The required position of the ruler 26 follows from the choice of the dimensions of the segment, because the ruler must ke situated at such a distance from the plane 28 of the supporting surface that the record carrier becomes (preferably lightly) S-shaped, withcut being brought directly into contact with the sup-porting surface; this is clearly shown in Eigure 4.
In the e~odiment shown in the Eigures 1 and 2, the ruler is simply formed by the bending of the end 29 of the shell-like cover element 21 which is situated near the supporting surface 5, the edge thus bent over performing the function of the ruler. The distance between the ruler 26 and the suppor~ing surface 5 can then be simply adjusted by adjustment of the shell-llke cover element.
The Figures 1 and 2 also show that at the area of its long side 30 which faces the transport roller 1 the supporting surface 5 comprises groo~e-like recesses 31 which correspond to the toroidal rings 10 and in which the toroidal rings project. The portions of the sup-porting surface 5 adjacent the toroidc~l rings thus reach as far as the transport roller 1, so that at these areas the surface is situated slightly kelow the path of the record carrier at the passage frcm the -transport roller to the surface. ~ kind of air cushion is thus formed underneath the record carrier; it has keen found that this has a parti-cularly favo~trable effect for a sm~oth S-shaped passage from the record carrier to the supporting surface, so that the flat positioning of the record carrier on the supporting surface is further enhanced.
The em~odiment shown in Figure 3 utilizes a transport roller 1 whose entire circumferential surface, ~or example, formed by a top layer of an elastic material, is used for the transport of the record carrier. Also provided are pressure rollers 11 and 12 which in this case co-operate directly with the circumferential surface of the trans-port roller 1 and which adjustable with respect thereto in the same manner as in the emkodiment shown in the Figures 1 and 2. Similarly, there is provided a shell-like cover element 21 which comprises openings 19 and 20 for the passage of the pressure rollers 11 and 12, respective-ly~ rrhe supporting surface 5 whose long side 30 adjoins the circum~
ferential surface of the transport roller 1 again extends in a plane which segm~etltally intersects the path of the record carrier around the transport roller, said path keing defined by the circumferential surface of the transport roller in said emkodiment. In said emkodimRnt a ruler 26 PI~O 81.508 6 12.5.1982 is provlded as a separate, strip-shaped component. The free end of the r~]er again presses the record carrier at the area of the supporting surface 5, ~ithout bringing the record carrier directly into contact with the suppor-ting surface.
The choice of the dimensions of the segment cut off from the path of the record carrier around the transport roller by the plane of the suppcrting surface again determines the distance bet~een the free end of the ruler 26 and the supporting surface 5 so thatuponits passage from the transport roller to the supporting surface 5 the record carrier ~ecomes S-shaped as previously descri~ed ~ith reference to Figure 4.
The record carrier 2 is thus absolutely flatly positioned against the supporting surface 5, so that it is ensured that the dis-tance between -the printing head 6 and the record carrier is always constant.
Obviously, the steps in accordance with the invention can also be taken for printers having a record carrier transport device of a type other than the descr:ibed type. For example, in the case of a record carrier c~nprising edge perforations, a drive with so-called tractors can be provided for this purpose. In suc~ a case the transport roller itself may be formed as a so-called spiked roller.
. .
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A printer comprising a guide device for trans-porting a record carrier by means of a transport roller, to a strip-shaped, flat supporting surface which adjoins the transport roller by way of one of its long sides, viewed in the transport direction of the record carrier, and along which a printing head is displaceable, the record carrier being pressed by a ruler from the side of the printing head before it reaches the area of the printing head, characterized in that the supporting sur-face is situated in a plane which segmentally intersects the path of the record carrier around the transport roller, viewed in a cross-sectional view thereof, the rise of arc (h) of the segment being smaller than half the radius (?) thereof, the ruler pressing against the record carrier at the area of the supporting surface without bringing the record carrier directly into contact with the supporting surface.
2. A printer as claimed in Claim 1, characterized in that the transport roller comprises toroidal rings which are spaced apart in its longitudinal direction, and which define the path of the record carrier around the transport roller, the supporting surface comprising groove-shaped recesses at its long side which faces the transport roller, said recesses corresponding to the toroidal rings which project therein.
3. A printer as claimed in Claim 1 or 2, charac-terized in that the ruler is formed by a bent end of a shell-like cover element which is arranged around the transport roller at a distance therefrom.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0264081A AT381388B (en) | 1981-06-12 | 1981-06-12 | WRITING WORK WITH A GUIDE FOR A RECORDING CARRIER |
| ATA2640-81 | 1981-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1186945A true CA1186945A (en) | 1985-05-14 |
Family
ID=3537879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000405007A Expired CA1186945A (en) | 1981-06-12 | 1982-06-11 | Printer comprising a guide device for a record carrier |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5816878A (en) |
| AT (1) | AT381388B (en) |
| CA (1) | CA1186945A (en) |
| DE (1) | DE3221793A1 (en) |
| FR (1) | FR2507543B1 (en) |
| GB (1) | GB2102347B (en) |
| IT (1) | IT1151613B (en) |
| SE (1) | SE448216B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3802532A1 (en) * | 1988-01-28 | 1989-08-10 | Siemens Ag | PAPER GUIDE DEVICE FOR PRINTING DEVICES |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1973311A (en) * | 1933-02-15 | 1934-09-11 | Remington Rand Inc | Typewriting machine |
| US2264386A (en) * | 1939-11-02 | 1941-12-02 | Victor Adding Machine Co | Duplicating machine |
-
1981
- 1981-06-12 AT AT0264081A patent/AT381388B/en not_active IP Right Cessation
-
1982
- 1982-06-07 FR FR8209853A patent/FR2507543B1/en not_active Expired
- 1982-06-09 GB GB08216717A patent/GB2102347B/en not_active Expired
- 1982-06-09 IT IT21783/82A patent/IT1151613B/en active
- 1982-06-09 SE SE8203558A patent/SE448216B/en not_active IP Right Cessation
- 1982-06-09 JP JP57097914A patent/JPS5816878A/en active Pending
- 1982-06-09 DE DE19823221793 patent/DE3221793A1/en not_active Withdrawn
- 1982-06-11 CA CA000405007A patent/CA1186945A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT381388B (en) | 1986-10-10 |
| GB2102347A (en) | 1983-02-02 |
| IT1151613B (en) | 1986-12-24 |
| ATA264081A (en) | 1986-02-15 |
| IT8221783A0 (en) | 1982-06-09 |
| GB2102347B (en) | 1985-02-20 |
| FR2507543A1 (en) | 1982-12-17 |
| FR2507543B1 (en) | 1985-07-05 |
| SE448216B (en) | 1987-02-02 |
| DE3221793A1 (en) | 1982-12-30 |
| SE8203558L (en) | 1982-12-13 |
| JPS5816878A (en) | 1983-01-31 |
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