JPH0331567Y2 - - Google Patents

Description

[Detailed description of the invention] The invention has a thermoplastic film layer on one side,
Concerning an endless ribbon with no printing defects or blurring at the joints.

In printing machines that use ink ribbons, ink from the ink ribbon adheres to type, needles, and ink ribbon running parts, causing color mixing in multicolored ribbons, clogging of type, and ink pooling on parts. In order to prevent these problems, a film layer is applied to one side of the ink ribbon base fabric made of cotton, silk, polyester, or polyamide using adhesive methods such as extrusion, lamination, dry lamination, welding using adhesives, ultrasonic waves, and high-frequency hot plates. An ink ribbon is being considered. When fitting these ink ribbons with a film layer on one side, the commonly used welding method has problems such as differences in the joining part due to the thickness of the base fabric including the film layer (Fig. Due to clogging of the base fabric (Fig. 2), there are significant print defects and blurred prints at the joints. Some materials for the film layer are not compatible with the base fabric, making it impossible to weld or having low bonding strength. An example of the invention is illustrated in FIG.

In the present invention, both ends of the ink ribbon to be joined are cut so as to have the same end face, and the cut faces are fixed in abutment so that there is no gap. This is an endless ribbon in which another film 5 is bonded to the back side of the film layer 1 around the abutted portion.

The film 5 used for the backing is made of polyamide, polyester, polycarbonate, or polyethylene film with a thickness of 6 to 20μ, which has less printing blur due to thickness, flexibility and impact strength, and the adhesive layer 4 of the film is made of polyamide or polyester film. ,
It is preferable to use EVA, acrylic hot melt adhesive, polyurethane dry lamination adhesive, nitrile rubber, chloroprene rubber, or nitrile phenol adhesive with a thickness of 2 to 5 μm.
As another example, FIG. 4 shows a case where a polyamide-based or polyester-based thermal adhesive film is used.

In this way, the endless ink ribbon, which is made by joining ink ribbons with film layers together by the back side of the film, has sufficient printing durability, and there are no gaps, steps, or clogging due to melted material at the joint, so the ink can be easily used. It is an ideal endless ribbon with smooth transition and no printing defects or blurring.

[Brief explanation of the drawing]

FIGS. 1 and 2 are side views of an endless ink ribbon joint made by a conventional joining method. Figures 3 and 4
The figure is a side view of the joining part of the endless ink ribbon according to the joining method of the present invention. 1... Film, 2... Base fabric, 3... Melt,
4...Adhesive layer, 5...Film, 6...Thermoadhesive film.

Claims (1)

[Scope of utility model registration request] This endless ink ribbon is made by cutting an ink ribbon that has a thermoplastic resin film layer on one side, butting the cross sections together, and bonding the back side with polyamide, polyester, polyolefin, or other film from the film side.