| JP2020192697 | PRINTING APPARATUS |
| JP5549231 | Printer |
| JPS5619778 | PRINTER |
SAETHER FRODE (NO)
WIKMARK JAN (NO)
AASTAD JAN (NO)
DARELL WIGGO (NO)
DAHL HARRY (NO)
| SE382962B | 1976-02-23 | |||
| EP0234589A2 | 1987-09-02 | |||
| EP0258881A1 | 1988-03-09 | |||
| US4088256A | 1978-05-09 | |||
| US4488830A | 1984-12-18 |
| 1. | A device for the extraction of paper printouts from the covers of data or word processing printers, with a draw roller that extracts the printout from the printer, c h a r a c t e r i z e d by a unit (5) driven by the incoming paper which drives a draw roller (4) that extracts the paper printout after it has passed through the printer. |
| 2. | A device in accordance with Claim 1, c h a r a c t e r i z e d by it consisting of two pairs of rollers (5, 4) which are connected with a transfer ratio greater than 1, from the drive rollers to the pair that are driven. |
| 3. | A device in accordance with Claim 1, c h a r a c t e r i z e d by it consisting of three rotating rollers (10, 12) and one fixed bar (9), where the lowest roller drives the other two with a transfer ratio greater than 1, and that the printout will glide towards the lowest roller (10). |
| 4. | A device in accordance with Claims 1 or 2 , c h a r a c t e r i z e d by a least one of the fixed metal bars having plastic glide sleeves with orings inserted which are positioned on the bar in accordance with the width of the paper, thereby controlling the paper feed in a lateral direction to prevent it being drawn out obliquely. |
| 5. | A device in accordance with Claims 1 or 2, c h a r a c t e r i z e d by the rotating rollers having orings along their length to create friction against the paper. |
The invention concerns a device to extract paper printouts from the covers of data printers, or word processor printers, so as to produce a smooth automatic means of handling long printouts. Data printers are often placed inside sound¬ proofing covers because of work environment considera¬ tions in offices. This leads to a number of problems when lengthy printouts are required, and the printout leaving the printer has to be led through one of the sides of the cover. If there is no automatic means of extracting the printout as it is leaves the printer, manual supervision will be required to prevent the paper becoming crumpled and creased inside the cover. Extraction devices exist which use a small motor to draw the paper out, but these are costly and unneces¬ sarily complicated solutions to the problem.
The main objective of the present invention has been to find a draw roller for the extraction of paper printouts from the covers of data printers (sound- proofing covers), which is simpler than existing motorized draw devices. More specifically, the objective is to create a draw roller without a motor, with a straightforward, robust construction.
The principle of the invention and the protection it provides are described in the characterizing part of Claim of Patent 1. Other details concerning the
invention are stated in the subsidiary claims.
Example:
The draw roller designed in accordance with the 5 invention is illustrated in the sketches where:
Fig. 1 is a schematic side section of a printer with a sound-proo ing cover and the first version of the draw roller is shown, while
Fig. 2 is a side section showing a further means 1Θ of designing the invention.
In Fig. 1, the draw roller's attachment brackets (3) (one on each side) are fastened to the cover CD by normal means. When being fed in, the paper (2) passes
J.5 under a lower roller (5a) in a pair of rollers (5a, 5b) which thereby start to rotate, a drive-wheel (6), which is also set in motion and forces an upper pair of rollers (4), (4a, 4b) to rotate. However, in this case the direction of rotation is the opposite of the lower
"20 pair of rollers C5). The transfer ratio is such that the upper pair of rollers (4) rotate faster than the lower pair (5). If the printout leaving the printer is led between the upper pair of rollers, the paper will be under tension and thereby be drawn out of the cover. 25 The lower roller (5a) is a PVC tube (38 mm) which is mounted so that it can rotate on its axis. There are two nickel-plated guide bars (7) below and on each side of the lower roller (5a) . There is at least one rubber ring (8) on the ~ PVC roller (5a). Adjacent to the rubber 30 ring (rubber rings) (8) there is a nickel-plated metal bar (5b) (16 mm) which is mounted so that it can be moved vertically, this can also rotate on its axis. This bar (5b) has two wheels (6) which can be made of rubber or another substance with a high friction 35 factor. The wheels (6) have a larger diameter (40 mm, approx. ) than the axle and rotate in cut outs in the
roller (5a) or outside the ends of the roller. The wheels (6) are the drive wheels for roller (4a) which could be a friction-coated (21 mm) roller. The upper roller (4b) could be a 16 mm nickel-plated metal bar. Apart from being able to rotate, the rollers (4a and 4b) must be capable of being vertically raised and lowered .
Another means of designing the invention is proposed. This is shown in Fig. 2. Here a nickel-plated metal bar (9) is fixed to the brackets (through bolt). The roller (10) is also a nickel-plated metal bar which has a number of o-rings on it to ensure friction with the paper, which is led over the roller (10) and beneath the bar (9). The bar (9) has plastic glide sleeves with inserted o-rings (not illustrated) that provide friction with the bar. As these can be moved along the bar in accordance with the paper width, they give lateral control and prevent the paper being drawn out obliquely. At the ends of the roller (10) there are some wheels made of a substance that causes friction (11). These are the drive wheels for the pair of rollers (12) which are nickel-plated bars with a number of o-rings. The drive wheels (11) have a larger diameter than the rollers (12) . This forces the paper to glide towards the roller (10) or the pair of rollers (12). Experiments have shown that the paper does in fact glide towards the roller (10). This is an advantage because the gliding movement means that there is a low level of lateral friction in the paper, which makes the control of the paper easier for the glide sleeves that prevent the paper being drawn out obliquely.
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