DE3602336A1 - FACSIMILE WRITER - Google Patents

Description

" Description

«/ In the case of facsimile writers of electrically transmitted N

Signals are graphically recorded by feeding recording paper from one Paper supply roll behind a recording head, at which the signals are delivered line by line across the paper, after which the paper is then sent to an output of the scribe. The feeding of pliable or limp and damp recording paper does not involve feeding problems, however, other dry recording papers are such as coated thermal facsimile recording papers so stiff that they retain the curvature or curvature that ° they received when they were wound onto a cylindrical core. The outer turns of the paper with a large For example, 3 or 4 inch diameters have no significant curvature or bend. but when the roll runs out by unwinding from the core,

* ® the diameter of the curvature decreases towards the core. And even if the problem of feeding the smaller curvatures is temporarily controlled by more closely spaced feeding and tensioning rollers, the paper leaves the pen with a remaining narrow curvature,

^ ° what problems reading, editing and filing the Document brings. Attempts have been made to alleviate the curl problems in dry paper by using the Wrapping paper around thick cores about two or more centimeters in diameter. With 3.7 cm and more for the paper windings, which must be added to the core diameter, the paper supply roll becomes the strongest Component of the recorder and prevents downsizing of the recorder as a whole.

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λ It is the object of the invention to reduce the size by facsimile writers with dry paper

-A-

"To allow for a reduction in the diameter of the paper supply roll and the problems of residual curvature overcome in the paper.

According to the invention, a facsimile writer comprises a housing, a recording device in the housing, a recording paper supply in the housing having a cylindrical core and a strip of thermal sensitive recording paper, which is tightly wrapped around the core, means to hold the web between the paper roll and the recording device to bend, and a means of removing the residual curvature from the paper, and is thereby characterized in that the core diameter is about 12.7 mm or less, and that the ratio of the length of the core to the diameter of the core is substantially 20: 1 or is bigger.

An embodiment of the invention is described below explained in more detail with reference to the drawing. It shows

Fig. 1 with a side view of a facsimile writer

Recording paper wound on a core with parts broken away,

2 shows an end view of the paper core and 30

Figure 3 is a side view of the core.

The facsimile writer shown in Fig. 1 has a housing 1, which consists of side walls 2, cover and Base walls 3 and 4, a rear wall 6 and a front wall 7, which with the side walls 2

- 5 -

- Forms a paper exit 8. The housing walls form a cover 5, which is attached to a base 10 via a swivel joint 15 is hinged. Inside the case there is provided a space for a recording paper supply roller 9, which is wound on a core 11. A feed roller 12 feeds paper behind a recording head 13 and pulled towards the exit 8.

The paper 9 on the roll can be a conventionally available paper with a dry, thermally sensitive Coating on the inside of the roll. A suitable recording head is Rohm, Type KH107-1 from of Rohm Corporation, Irvine, California. Such a recording head has, for example, two thousand Heating elements 14 in a line across the width of the paper on a 25.4 cm wide core. Graphic signals are sequentially supplied from a source 16 to the elements across the paper, so that the paper is marked line by line with the graphic information of the signals as the paper 9 is passed behind the head 13.

According to the invention, a device 16 for smoothing de = Paper 9, when it leaves the roll, is arranged within the housing in a position in which it lies on the paper rests. The smoothing device 16 has a curved metal plate 17 which is around a swivel joint 18 on the Can pivot top of a stand 19, which extends from the bottom wall 4 from. The smoother 17 is yielding or resiliently pressed down on the paper roll 9 via a spring 21 or a weight W or both.

When the paper roll is full, a straight edge 22 runs at the front free end of the smoothing device 17 tangential or free to the paper 9 between the roller and the recording head 13. Identify the

BATH ORIGINAL

Paper supply by unwinding from the core 11 comes to an end, the diameter of the remaining turns decreases down to the diameter of the core. These inner turns tend to keep the tighter remaining curvature near the core after leaving it. But the front dressing ruler 22 of the smoothing device swings progressively into the paper web and produces an increasing curvature A up to a right angle on the changed paper web 9 *, as shown by the phantom representation 17 * of the smoothing device. As a result of the increasing curvature, an increasing smoothness effect is exerted on the paper in accordance with the narrower remaining curvature of the inner paper turns.
15th

The ability of the present pen to correspond to the remaining curvature of the increasingly dense interior Providing a compensation allows a much greater reduction in the diameter of the paper turns Kerns despite the tighter inner turns associated with it. While known kernels for dry Recording paper exceeding a diameter of 5 cm is in the facsimile writer according to the invention a core size of about 12.7 mm and less is practical and applicable. A core with a ratio of core length to core diameter of 20 or more: 1 is possible. This inventively achievable diameter and the inventively he, achievable ratios allow a great reduction in the size of the pen.

It is to be understood that the description is for the purpose of explanation only and that the invention is subject to modifications and includes equivalents falling within the scope of the claims.

ORIdINAL BATHROOM

Claims (2)

Expectations Facsimile writer with a housing, with a recording device in the case, with a recording paper supply in the case with a cylindrical Core and a strip of thermally sensitive recording paper, which is tightly wrapped around the core, means for bending the web between the roll of paper and recording means and means for removing the remaining curvature from the paper, characterized in that the core diameter is about 12.7 mm or less, and that the ratio of the length of the core to D-SOOO Munich 2 FOB 26 02 47 Cable: phone Telecopier Infotec 6400 B telex . the diameter of the core is substantially 20: or greater. 2. Recording paper supply with a cylindrical core and a strip of thermally sensitive Recording paper which is tightly wrapped around the core, characterized in that that the diameter of the core is about 12.7 mm or less, that the ratio the length of the core to the diameter of the core is substantially 20: 1 or greater, and that the thermally sensitive surface of the recording paper is directed inwards towards the core, so that the paper can be fed on a folded path directed from the core, to remove the curvature of the paper.