NO116028B - - Google Patents

Description

Guide for registration strip for multiple printers.

With the increasingly used multiple printers, different measurement values, such as e.g. voltage, frequency and power, recorded next to each other on a strip. In the case of multiple printers with very small print widths, you get an impeccable drawing in rectilinear coordinates with a completely flat drain table by using a guide for the print tip along a chord to a circle around its pivot axis, as the radial deviation is recorded during suspension. For larger writing widths per system, however, this method can no longer be used, as the pen would lift too much from the paper. in the middle position or lie too firmly on in the peripheral areas. This shortcoming can be remedied by transferring the writing movement from a swinging arm to the stylus via an intermediate link, e.g. in the form of a weight bar which at one point has guidance in the direction towards and away from the substrate. The use of such a device is, however, subject to strong limitations due to the relatively large technical equipment. Another way out is to use registration paper with curved coordinates, which is not often used due to the inevitable distortion of the measurement curves.

According to the invention, the aforementioned disadvantages of multiple printers with a relatively large print width are avoided by means of a registration strip guide, whereby the contact surface for the registration strip, corresponding to the number of measuring devices, consists of several cylindrically convex-curved surfaces, which without cutting edges are interconnected with each other by using concavely curved surfaces. Furthermore, the invention involves the registration strip being pressed against the contact surface by means of a pressure rail made of metal or plastic which may be adapted to the contact surface with regard to shape and curvature. The pressure rail can e.g. consist of a transparent plastic such as Plexiglass, and be provided with grading.

Fig. 1 shows purely schematically a section S through the paper guide, whose radii of curvature are Ri, R- and Rs, and where the centers of curvature are indicated by the gauge shafts Di, D- and D;i. At the transition points Ki and Kj, the paper strip guidance does not follow the dotted lines, but the curvature is flattened (raised curve) at the transition points, so that cutting edges are avoided and the registration strip everywhere can follow the contact surface.

Ai and A^ show sections through the pressure strip which presses the paper web against the contact surface.

In fig. 2 denotes 1 paper supply roll.

The registration strip is divided into three lanes 2, 3 and 4, where the measuring curves are registered by the writing springs 5, 6 and 7. These are carried by writing arms 8, 9 and 10, which are directly connected to the not shown measuring works. The registration paper is pressed with the help of the pressure strip 11 against the curved contact surface, which is covered by the paper. The pressure strip 11 is fixed pivotably in holding members 12 and 13 so that it can be folded over.

Claims (3)

1. Guide for registration strips for multiple printers, characterized in that the contact surface for the registration strip consists of several cylindrically convex-curved surfaces corresponding to the number of measuring devices, which are interconnected via concave curved surfaces while avoiding cutting edges. 2. Guide as stated in claim 1, characterized in that the registration strip is pressed against the contact surface by means of a metal or plastic pressure rail, which with regard to its shape and curvature is adapted to the contact surface. 3. Guide as stated in claims 1 and 2, characterized in that the pressure rail consists of transparent plastic and is provided with a graduation.