JPH08217039A - Printing method in packing machine - Google Patents

Abstract

PURPOSE: To provide a printing method which can be easily applied to the printing of a film of a packing machine which effects sealing, while a feed speed of an object to be printed is being changed. CONSTITUTION: A feed speed of a packing film 8 is detected by a rotary encoder 7. A carbon tape 2 delivered from a carbon tape reeled fabric 1 and a packing film 8 are held between a head receiving platen roller 6 and a line thermal head 5 so that required characters are printed on the film 8. Current rate for the line thermal head 5 is controlled in synchronization with the feed speed of the packing film 8 detected by the rotary encoder 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method in a packaging machine for energizing a line thermal head to print on a packaging printing object which is moving.

[0002]

2. Description of the Related Art In recent years, it has been often required to display different characters and symbols on a package such as the date of manufacture, the expiration date, and the serial number of the product to be printed, depending on the object to be printed. In the conventional packaging machine, when printing is performed on a packaging film, the required printing is performed by following the speed of the film supplied from the original packaging film.

That is, as the current inexpensive line-following type production control printer, there is one called a hot printer device that presses a heated marking on a thermal transfer ribbon for printing, or ink is exuded from a heated engraving roll. There is a so-called hot roll printer that presses the surface to print. Since these devices use engraving and engraving rolls, it was necessary to replace the print section every time the print content was changed.

On the other hand, as a printer capable of easily changing the characters to be printed by computer control, a printer using a thermal transfer ribbon used in a word processor or a thermal transfer ribbon incorporated in a label selling machine is used. There is a printer device using.

[0005]

However, in the conventional printing methods using these printer devices, since the printer device side controls the feeding of the printing object such as film, the sealing is performed while changing the feeding speed of the printing object. It could not be easily incorporated as a printing method on a film of a packaging machine.

An object of the present invention is to provide a line-following printing method which can be easily applied as a printing method on a film of a packaging machine in which a feeding speed of a printing object is changed and sealed.

[0007]

In a printing method according to the present invention for solving the above-mentioned problems, a line thermal head detects a moving speed of a packaging printing object which is moving and synchronizes with the detected speed. Power on to print.

In order to detect the moving speed of an object to be printed such as a film by the printing method according to the present invention, a suitable moving speed detecting means such as a rotary encoder may be adopted.

[0009]

In the printing method in the packaging machine according to the present invention, as described above, the moving speed of the printing object is detected, and the line thermal head is energized in synchronization with the detected speed to perform printing. , Not only the date function of the auto calendar, but also the serial number changing method, which is very troublesome in the type change system, can be printed only by inputting from the operation panel.

[0010]

EXAMPLES The printing method according to the present invention will be specifically described below with reference to the illustrated explanatory surface. FIG. 1 shows one embodiment of the printing method according to the present invention. In FIG.
Is a heat transfer type carbon tape raw material, and the carbon tape 2 fed from this is used for printing as will be described later, and is then wound on a used carbon tape take-up reel 4 through a fixed-size / feed driving roller 3. . It is preferable that the carbon tape take-up reel 4 has a constant torque drive system using a DC motor, or has a function of winding a slack portion by a dancer roller and a sensor.

Reference numeral 5 is a line thermal head, and 6 is a head receiving platen roller. Between the line thermal head 5 and the head receiving platen roller 6, the carbon tape 2 from the original fabric 1 and the packaging film 8 to be printed are overlapped and passed, and pre-programmed printing is performed on the upper surface of the packaging film 8. To be done.

Reference numeral 7 denotes a rotary encoder, which detects the transport speed of the packaging film 8. The transport speed of the packaging film 8 detected by the rotary encoder 7 is sent to an appropriate control device (not shown), and the energization of the line thermal head 5 is controlled in synchronization with the detected transport speed.

The illustrated printing apparatus has the above-mentioned structure, and the rotary encoder 5 detects the moving speed of the wrapping film 8 of the printing object, and the line thermal head 5 is energized in synchronism with the detected speed. Since the printing is controlled to be performed, it is possible to easily print on the packaging film 8 only by inputting from the operation panel.

[0014]

As described above, according to the present invention, by detecting the moving speed of an object to be printed and synchronizing with the detected speed, the line thermal head is energized to control printing. It is possible to easily print on the print target by simply inputting the manufacturing serial number from the operation panel.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a printing device in a packaging machine for carrying out a printing method according to the present invention.

[Explanation of symbols]

 1 Carbon tape original fabric 2 Carbon tape 3 Fixed size / feed drive roller 4 Used carbon tape take-up reel 5 Line thermal head 6 Head receiving platen roller 7 Rotary encoder 8 Packaging film

Claims (1)

[Claims] 1. A printing method for printing on a moving packaging printing object, wherein the moving speed of the printing object is detected, and the line thermal head is energized in synchronization with the detected speed to perform printing. A printing method in a packaging machine characterized by the above.