SU802870A1 - Device for evaluating pigment paper copying ability - Google Patents

Description

(54) DEVICE FOR ESTIMATING THE COPYING ABILITY OF PIGMENT PAPER

one

The invention relates to a device for evaluating the copying ability of pigment papers, in particular the copy papers used in copying under a pencil, a pen, or recording copy papers, working under the pressure of a recorder pen,

A device for estimating marking paper of copier papers is known, which contains a base on which racks with a crossbar are fixed with a loading device in the form of a rocker arm. At one end of the rocker arm, a contact head is fixed in the form of a roller. The device has a device for fastening samples, which is connected to the actuator 1.

However, such a device does not provide evaluation of carbon paper under operational conditions.

The purpose of the invention is to improve the accuracy of the assessment by bringing the test conditions to operational

This goal is achieved by the fact that the device, including the base, the racks with a crossbar mounted on it, the hingedly mounted feed arm, at one end of which a contact head is installed in the form of a roller, and the device for attaching the sample, connected to the drive, contains weights a load screw and screw installed on the other end of the rocker arm and in contact with the weighing platform, and the fixture for attaching the specimen includes an interchangeable frame mounted on the base; mi ends and mounted on the edge of the plate and the platen roller with a clamp disposed below smennoyramkoy. Plates

5 are arranged in a frame parallel to one another or curved from the middle of the frame to its edges.

FIG. 1 shows the proposed device, a general view; in fig. 2 - then

0, top view; in fig. 3 shows a section through J-A-A in Fig. 2; on flg. 4, a replaceable frame with a set of parallel plates; in fig. 5 - the same with a set of curved plates.

five

The device contains a base 1, on which two pillars 2 are installed; a crossbar 3. A rocker arm 4 is hinged at the last. A contact head 5 is fastened at one end of the rocker arm 4,

0

The bottom side of the head 5 has two rows of bearings b and a roller 7. The geometrical axes of the bearings and the roller are parallel to each other and run under a right angle to the longitudinal axis of the device. In this case, the bearings are installed in two rows in a checkerboard pattern and the axes of each row are equidistant from the axis of the roller 7.

Thus, the roller 7 is between the rows of pods b and rests on the nyh. The single roller is chosen such that it overlaps the width of the test paper samples. To install the bearings b and the end journals of the roller 7, holes and lugs are made in the body of the contact head 5.

At the other end of the rocker arm 4 is placed the screw of the load 8. The device contains weights 9 mounted on the base 1. The screw 8 contacts the load platform of the scales.

Under the contact head, there is a support roller 10 with a clamp comprising a shield 11 and an eccentric 12. The shield 11 has the shape of a rectangle with two studs at the corners that enter the lugs on the uprights 13 of the base 1. The geometric axis of the lugs passes; at a right angle to the longitudinal axis of the device, the shield is installed with the possibility of turning its spikes in the eyes of the base. On the upper side of the shield 11 are fixed supports for the bearings 14 and the support roller 10.

Under the shield 11, an eccentric 12 is installed to lower and raise the shield with the support roller 10 to the working position. The eccentric 12 is mounted with spikes 15 in the openings of the guides 16. To control the eccentric 12 of the fixture. It serves as a handle 17.

The device for fastening the samples is made in the form of an interchangeable frame 18 with a set of plates 19. In FIG. 4 and 5, two variants of an interchangeable frame are presented, in each of which the plates 19 are mounted on an edge, and their ends are attached to the opposite walls of the frame 18.

Plates 19 in the kit can be installed parallel to one another. Moreover, it is advisable to have several such frames with a set, differing only in the distance between the plates. The desired spacing of these distances is 0.25-1.25 mm.

The plates 19 in the set can be bent from the middle line of the frame 18 to its edges with a general orientation along the direction of movement of the fixture for fastening the samples (Fig. 5). In this case, the distances between the plates 19 in the middle part are the same along their length, and the ends of the plates are closed at the edges of the frame 18.

The replaceable frame 18 is mounted on the front 16 and is provided with clamping

the device 20 for fastening on the frame 18 on top of the paper samples 21 (FIG. 3).

The replaceable frame 18 has a nut 22 for connecting to the drive shaft 23 of the e frame and the electric motor 24. There are switches 25 on the base for starting the electric motor 24, and limit switches (not shown) to limit the overlap of the interchangeable frame 18.

 The device works as follows.

To determine the copying capacity of paper placed between sheets of writing paper, they are secured with a clamping device 20 on

5, a removable frame 18 with a set of plates 19, install the frame 18 on the guides 16, connect the nut 22 to the drive shaft 23.

The electric motor is switched on by means of a switch 25 and a replaceable re 4c 18 with samples 21 is inserted between the roller 7 and the support roller 10. The frame 18 rests on the guides 16 and the support roller 10. The handle 17

5 rotate the eccentric 12 of the retainer to set the frame 18 to a horizontal position. Screw load 8 create controlled on a scale of scales 9, the pressure of the roller 7 on the samples 21.

The motor 24 is turned on by the switch 25, since it was turned on by the limit switch, and the frame 18 with the samples is moved towards the electric motor 24, while on the samples

21 paper prints are obtained from the action of the plates 19. After turning off the electric motor, the samples 21 are removed and the quality of the prints obtained is determined visually or with

using optical instruments.

In an interchangeable frame 18 with parallel plates 19, the distance between the latter is ejected such as they occur in the practice of using

Printing Mechanisms. Thanks to the rajas with curved plates, an estimate of the resolution of the copy paper along the border of the print of the splint and the beginning of distinct separate lines is provided.

The border is determined by the radius of the solid portion of the print.

The proposed device allows to determine the copying ability

by the number of copies received simultaneously, and by the number of copies obtained sequentially. Sheets of writing paper can be replaced at the same position as the copy paper being tested.

Claims (3)

Claims. 1. The device is to assess the copying ability of pigment paper, containing the base, installed on it stands with a crossbar, laapvmp but a rocker mounted on it, at one end of which a contact head is installed in the form of a roller, and a device for fastening the sample connected to a drive, characterized in that, in order to improve the accuracy of the assessment by approximating the test conditions, contains scales with a loading platform and a loading screw installed at the other end of the rocker arm and in contact with the loading platform of the balance, and the fixture for attaching the sample includes a replaceable frame, fixed in it by one ends and IS iS Plates mounted on an edge and a controversial roller with a clamp located under the interchangeable frame 2, The device according to claim 1, characterized in that the plates are arranged in a frame parallel to each other 3. Apparatus pop, 1, characterized in that the plates are curved from the middle of the frame to its edges. Information sources, 0 taken into account in the examination 1. USSR author's certificate in application number 2636418/12, cl. G 01 N 33/34, 30.06,78 (prototype). IS -nineteen