Patent Publication Number: US-4318113-A

Title: Paper conveying device for a recording unit

Description:
BACKGROUND OF THE INVENTION 
     The invention relates to a paper conveying device for a recording unit with a support for the blank paper, with rollers for the guidance and conveying of the writing paper and with a recorder which records essentially perpendicular to the longitudinal direction of the paper as well with at least one deflection roller in the paper conveying path over which the paper is conducted. 
     A paper conveying device of the above type is known from the German OS No. 2614690. It can easily happen in this known paper conveying device that the paper strip is not precisely aligned with respect to the paper conveying device when the recording unit is loaded with recording paper. This can mean that the recording paper is not supplied in a straight line from the conveying device, which leads to the fact that the curves inscribed on the recording paper are distorted. 
     SUMMARY OF THE INVENTION 
     The object of the invention is to create a paper conveying device of the type initially cited in which the recording paper can be righted in its direction of travel. 
     This object is inventively achieved in that at least one deflection roller is rotatably mounted for angular adjustment approximately in the longitudinal direction of the paper. 
     In this manner, the deflection roller can always align itself to the drive roller during the feed of the paper. By so doing, the paper is also always aligned in the desired conveying direction so that, in all, a secure drive is guaranteed. 
     Further details of the invention ensue from the sub claims. The invention is explained in greater detail on the basis of an exemplary embodiment illustrated in the figures on the accompanying sheet of drawings; and other objects, features and advantages will be apparent from this detailed disclosure. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 shows a diagrammatic longitudinal sectional view of a recording unit with an inventive deflection roller; and 
     FIG. 2 shows the recording unit with the deflection roller according to FIG. 1 in a diagrammatic top view. 
    
    
     DETAILED DESCRIPTION 
     As shown in FIG. 1, a recording unit 1 is loaded in a support mount 2 with a stack of folded recording paper 3. As viewed in the conveying direction, the paper 3 proceeds from the paper stack first between a brake roller 4 and a pressure plate 5. It is then conducted about a deflection roller 6 and onto a paper table 7 on which it is conducted through a blotting roller 8 for drying the recording and, finally, the paper is conducted through the nip between a roller 9 and a pressure roller 10. The roller 10 is resiliently pressed against the roller 9. The roller 9 serves as the drive roller and is driven in the direction of arrow 12 by means of a motor 11. The pressure plate 5 is resiliently pressed toward the brake roller 4 by means of springs 13. The pressure piece 5 and the brake roller 4 effect that the paper 3 is stretched tight from there until the drive roller 9. 
     The recording ensues by means of a jet stylus 14 in the area of the deflection roller 6, said stylus writing essentially perpendicular to the longitudinal direction of the paper. 
     FIG. 2 shows that the deflection roller 6 is supported at a bow 15 which includes a base plate 16 which is rotatably mounted for angular adjustment about an axis 17 at the underside of the paper table 7. The base plate 16 further exhibits a slot 18 curved around the axis of rotation 17, in which slot 18 a fixing screw 19 for arresting the rotatability of the base plate 16 and, thus, of the deflection roller 6 is conducted. So that the bow 15 of the deflection roller 6 is more clearly visible, the brake roller 4 and the pressure plate 5 have not been illustrated in FIG. 2. 
     Even given a paper insertion which was not proper, such an oblique paper position is always automatically achieved with the above feature via the deflection roller 6 so that the paper 3 proceeds in the prescribed conveying direction. At the end of the bow 15 on the side of the bearing which provides the rotational axis 17, the end face of the deflection roller 6 also exhibits a flange 20 which serves as a reference edge for the recording paper 3. This means that the paper 3 is lightly pressed against the flange due to the oblique position of the deflection roller 6, so that this paper edge is also precisely conducted between rollers 9 and 10. 
     It will be apparent that many modifications and variations may be effected without departing from the scope of the novel concepts and teachings of the present invention.