JPS6244720A - Production of roller type photographic material - Google Patents

Abstract

PURPOSE:To form the stable shape and the winded shape of a slit roll by sticking and fixing the end of a long length photographic material on the surface of a core with irradiating an ultra sonic wave, thereby winding up the prescribed material to the rolled shape thereof. CONSTITUTION:The end of a photographic paper 6 in which a silver halide photosensitive emulsion is coated on the paper substrate having polyethylene coating layers on both sides, is wounded around the surface of the core 7 composed of a paper made of a kraft pulp so as to wind up the end part of the photosensitive surface of the prescribed paper. A tip of a horn 1 is sticked to the core under a pressure by pushing the prescribed tip to the surface of the core 7 from the upper side of the photographic paper 6 with using a supersonic wave oscillating device 10 attached a holder 3 which accords with a curvature of the core at the tip of a holder 3, and by gripping a handle grip 8. The end of the prescribed paper is sticked and fixed on the core with 2sec an sticking timer, and 40kHz the oscillating frequency when a switch 5 is set to 'on'. And then, a sliter is operated, and the driven roller 9 is rotated, thereby forming the prescribed photographic material to the rolled type having 100m winds. Thus, the stable long length rolled photographic paper having less tendency for loosening and slipping off the winds may be obtd.

Description

Detailed Description of the Invention (8) Field of Industrial Application The present invention involves adhesively fixing a core and a photographic material by ultrasonic irradiation in order to form a long photographic material into a roll, and forming the shape of a slit roll. This invention relates to a method for producing a roll-shaped photographic material that can be stably produced in a rolled form.

(8) Prior art and its problems As a method for manufacturing photographic materials into small rolls,
There is a method in which the ends of a long photographic material cut into small pieces are fixed to the winding core with adhesive tape, or the end portion is wrapped around the core without using adhesive tape.

The method of fixing the edges of photographic materials with adhesive tape has a negative impact on the quality of the photographic materials, such as fogging and sticking due to the tape's adhesive, and printers with adhesive tapes that peel off from the core after the photographic material is used up. There are many problems, such as inhibition of oily paper properties due to sticking in processors, etc., and waste of a great deal of effort in selecting adhesive tapes.

On the other hand, in the method of not fixing the ends of the photographic material without adhesive tape, since the ends of the core and the photographic material are not fixed, the photographic material and the core may slip when wound up into a roll, and after the roll is formed, This was a cause of loose winding, misalignment, etc. As described above, it has been difficult to stably produce small-sized rolls.

(C) Purpose of the invention As a result of extensive research into methods for stably manufacturing small-sized rolls, the inventors discovered that an adhesive fixing method using ultrasonic irradiation is superior, and have accomplished the present invention. reached.

An object of the present invention is to provide a method for stably manufacturing small-sized rolls. '(D) Structure of the Invention That is, the present invention provides a roll-shaped photographic material characterized in that the end portion of a long photographic material is adhesively fixed to the surface of a core by ultrasonic irradiation and wound into a roll. It depends on the manufacturing method.

The ultrasonic bonding method used in the present invention has a frequency of 10 to 4
This method involves irradiating the ultrasonic sensitive resin with a 0 KHz ultrasonic current and bonding due to internal heat generation.

As the winding core, paper made from kraft pulp, paper whose surface has been treated with synthetic resin such as polyethylene, ABS, acrylic, etc., or paper made of materials such as polyethylene, ABS, acrylic, etc., or paper with a synthetic resin surface can be used. It is preferable to use one that has As photographic materials, those using a support having a synthetic resin surface such as polyethylene or polyester are preferably used, and silver halide photosensitive materials using protective colloids such as gelatin as a binder or receiving materials for diffusion transfer methods are preferably used. Contains non-photosensitive materials.

(E) Examples The present invention will be explained in detail below based on the drawings.

FIG. 1 is a side view showing a situation during ultrasonic bonding, showing a negative embodiment of the present invention.

The photosensitive side edge of a photographic paper (6) coated with a silver halide photosensitive emulsion on a double-sided polyethylene coated paper support is placed on the surface of a paper core (7) made of kraft pulp as shown in the figure. The handshake part (
8) and press it from above the photographic paper (6) to the surface of the core (7), crimp the tip of the horn (1), and then press the switch (5).
), set the adhesion timer to 2 seconds, and set the oscillation frequency to 40K.
After fixing with adhesive at Hz, the slitter is driven and the drive roller (9) is rotated to produce a long roll of 100 m. In the ultrasonic oscillator (10) (2)
is an ultrasonic vibrator, and (4) is a spring.

By the fixing method described above, it was possible to produce a stable long roll of photographic paper without loosening or shifting. When this roll of photographic paper was used up, the adhesively fixed portions were easily peeled off by ultrasonic irradiation.

(F) Effects of the Invention According to the present invention, a long photographic material can be adhesively fixed to a winding core by ultrasonic irradiation and wound into a roll shape, and the long roll shape is stable without loosening or shifting. Photographic materials can be manufactured. As a result, there is no adverse effect on quality such as fogging or sticking caused by adhesive tape, which was conventionally used for fixing the edges, and there is no interference with paper passing in equipment such as automatic processors and printing machines, and there is no adhesive tape. There is no need to waste time selecting tapes. This method solves the problems of loosening and twisting of the windings that occur when adhesive tape is not fastened to the rough edges, and is a very stable method for manufacturing long roll-shaped photographic materials.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a state of ultrasonic bonding according to an embodiment of the present invention. 6... Photographic material 9... Drive roller 7... Winding core 10... Ultrasonic oscillator (partially broken view)

Claims (1)

[Claims] 1. A method for producing a roll-shaped photographic material, which comprises adhering and fixing the ends of a long photographic material to the surface of a winding core by ultrasonic irradiation, and winding the material into a roll.