JPS61178360A - Paper-curl correction device for facsimile recorder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper core curl correction device for facsimile recorders.

In facsimile recorders of electrically transmitted signals, graphic records are typically fed by recording paper from a paper supply roll through a record head where signals are applied line by line across the paper. The paper is then sent from the recorder to the exit. This does not occur when supplying soft, wet recording paper, but dry recording paper, such as Ike's coated thermal facsimile recording paper, is very stiff and can be wrapped around a cylindrical core. The added curl will remain. For example, bending the paper outside of large diameters of 3 or 4 inches does not result in significant curl. However, as the roll is reduced by core stripping, the curl diameter decreases toward the core diameter. Even when controlled, the paper leaves the recorder with tight curls that interfere with reading, handling, and storage of the record. In the past, attempts have been made to minimize the problem of paper curl around large diameter cores of about 2 inches or more. If you add more than an inch and a half of paper to the core diameter, the paper supply roll becomes the bulkiest element in the recorder;
This prevents miniaturization of the recorder as a whole.

It is an object of the present invention to enable a reduction in the size of a dry paper facsimile recorder by reducing the diameter of the paper supply roll and to solve the problem of residual curl.

In the present invention, a facsimile recorder includes a housing surrounding a space for receiving a roll of recording paper, a recorder head within the housing for applying a recording signal to the paper, and a feeding means for transporting the paper along a path from the roll to the recorder head. and,
straight edge means having at least the width of the paper roll supported on a pivot in the housing in a position to guide the paper between the feeding means, the pivot being provided with straight edge means having a width of at least the width of the paper roll so that the diameter of the paper roll is reduced so that the paper It is positioned relative to the paper feed path to swing a straight edge forward into the paper path as the applied curl bending increases.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The facsimile recorder shown in FIG. 1 has a side wall 2)!
23, has a housing 1 formed by a bottom wall 4, a back wall 6 and a front wall 7. The side wall 2 forms a paper outlet 8. The walls of the housing also form a cover 5, with the bottom 10 hinged at the pivot 15. Inside the housing there is space for a recording paper co-feed roll 9 wound onto a core 11. The paper is transferred to the recording head 1 by the feed roll 12.
3'S: Pass through and be drawn towards exit 8.

The paper 9 on the roll may be a commercially available paper with a dry thermal coating on the inside surface on the roll; a suitable recording head is the Roam type KH107-1 available from Rol+m.

For example, such a recording head has 200 heating elements 14 in a row spanning the width of the paper on a 10 inch wide core. Graphic signals are applied from a source 16 successively to the elements laterally across the paper, so that the paper is marked by a signal of graphic information line by line as the paper 9 is fed through the head 13.

In accordance with the present invention, a device 16 for uncurling the paper 9 is mounted within the housing in a position to retain the paper as it is rolled off the roll. The uncurling device 16 comprises a woven metal sheet 17 that swings on a pivot 18 on top of a datum 19 extending from the bottom wall 4 . The metal sheath 1 or curl straightener 17 is bent and pushed down onto the paper roll 9 by a spring 21 or a weight W or both.

When the paper roll is completely filled, the straight edge 22 of the front free end of the curl straightener 17 is oriented tangentially, i.e. the roll and the recording head 13
Send Paper 9 between.

As the paper supply is reduced by unwinding the core 11, the diameter of the remaining turns decreases towards the diameter of the core. These inner turns contact the core after exiting the core and attempt to keep the tight residual curl intact. However, the front straight edge 22 of the curler deflects considerably into the paper path, increasing the bend A to a right angle into the modified paper path 9' as shown by the curler's peg line position 17'. let

Thus, the increased bending exerts an increasing straightening action on the paper in proportion to the tighter residual curl of the inner paper wrap.

The ability of this recorder to proportionally compensate for residual curl due to increasingly tighter inner paper wraps allows substantially greater reductions in core diameter despite tighter inner wraps. Make it. While conventional cores for dry recording paper exceed two inches in diameter, the core size of the present invention, approximately one and a half inches or less, is practical and versatile. Cores with core length to core diameter ratios of 20 or more to 1 are possible.

This newly realized diameter and ratio made it possible to greatly reduce the size of the recorder.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view of a facsimile recorder having paper wrapped around a core according to the present invention, FIG. 2 is an end view of the paper core, and FIG. 3 is a side view of the core. lNifacsimile recorder, 2.3.4.6.7: wall,
8: Paper outlet, 9: Recording paper supply roll, 11: Core, 13 Recording head, 14
: heating element, 16: decurling device, 17: curl straightener, 18: pivot. (Ridan J: 2)

Claims (8)

[Claims] (1) a housing around a space for receiving a roll of recording paper; a recorder head within the housing for applying a recording signal to the paper; means for transporting the paper from the roll to the recorder head on a path; and means for transporting the paper from the roll to the recorder head. straight edge means having at least the width of the paper roll supported on a pivot in the housing in a guiding position between the feed means and the pivot, said pivot being adapted to reduce the diameter of the paper roll and thereby reduce curling applied to the paper; A facsimile recorder characterized in that the facsimile recorder is arranged relative to the paper feed path so as to wave a straight edge forward in the paper path as the bending increases. (2) A facsimile recorder according to claim 1, wherein said straight edge means has a terminal straight edge for bending the paper path. (3) A facsimile recorder as claimed in claim 2, wherein said pivot of said straight edge means is arranged to increase the bending of the paper to a substantially right angle. (4) A facsimile recorder according to claim 2, wherein said straight edge means has a portion intermediate said pivot and a straight edge supporting a full roll. (5) A facsimile recorder according to claim 1, having means for bending toward the paper roll and abutting against the straight edge means. (6) A facsimile recorder according to claim 5, wherein the abutting means comprises a spring. (7) The facsimile recorder according to claim 5, wherein the colliding means comprises a weight. (8) The facsimile recorder according to claim 1, wherein the space for receiving the roll is between the pivot of the straight edge means and the feeding means.