JPS5910359A - Applicator head for coating - 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 an applicator head 9 for applying a coating, such as applying adhesive to paper.

For example, in the chestnut industry where it is necessary to coat paper with adhesive, such as in the cigarette manufacturing industry, there is a strong demand for adhesive to be applied with a uniform thickness.

Also, in some cases it may be desirable to create a pattern that leaves an uncoated area completely surrounded by coated areas, which would result in a uniform thickness of coating over the area to be coated. It becomes difficult to give oneself.

For example, the manufacturing industry requires wrapping paper around the filter tip. The chip 4-part for this purpose is coated with adhesive so that it will be glued when wrapped around the filter 9 chip. However, adhesive is not applied to predetermined zones, and chips are not applied in these zones.
Air is allowed to flow through a filter. Looking at the finished cigarette, this band extends circumferentially around the filter tip, and the tip zoomer is wrapped around the tip, its edges overlapping and glued together. .

Areas not coated with adhesive are chipped.
• End before the above-mentioned end edges of ξ-, leaving an edge coated with adhesive so that the end edges are glued together over their entire length.

The coating is deposited onto the running paper ribbon according to a coating pattern called a "skip gap," that is, a pattern of intermittent areas of uncoated gaps, followed by chipping.
Cut as paper. If the adhesive is water-based, the paper ribbon should be passed through the applicator head 8 at a low speed to allow the coating surface to dry before the coated ribbon reaches the take-up spool. Make it. In such cases, the desired "skip gap" can be achieved by clearly distinguishing the uncoated area from the coated area.
Coating the ribbon with ξ turns is not very difficult. However, conventionally used applicators are not suitable for use in applying hot-melt adhesives. When using hot-melt adhesives, the applicator must be operated at high speeds and the ribbon to be applied must be run at high speeds so that coated areas can be clearly distinguished from non-coach inked areas (Skip! Gap]・It is difficult to make a ξ turn. The use of hot melt adhesives is necessary for some materials, such as those currently used as filter tips.

The present invention features an applicator head 9 that allows coating of uniform thickness even when operated at high speeds with a [skip gap] ξ turn that clearly distinguishes the coating area from the non-coating area. The purpose is to provide

According to the invention, there is provided an applicator head for applying a coating material to a running ribbon, the applicator head being arranged transversely to the running direction of the ribbon and in the form of at least one continuous band along the ribbon. An applicator head is provided that includes an ejection slot adapted to apply a coating material and a device for intermittently opening and closing the ejection slot to intermittently apply the coating material to a zone adjacent the continuous zone. be done.

According to a first embodiment of the invention, a single centrally interrupted ejection slot is used to form a narrow uncoated line along the center of the ribbon. A finger is transversely positioned in the middle of each half-slot section of the ejection slot.

The fingers are intermittently retractable so that two continuous bands of coating material and one interrupted band of coating material located between the two continuous bands are applied from each half-length slot. be done.

According to a second embodiment of the invention, a first ejection slot is provided which is interrupted to allow two continuous bands of coating to be applied on each side of the uncoated centerline. and laterally aligned with each other,
two further slots positioned in close proximity to the first discharge slot and aligned with each of the interrupted portions of the first discharge slot, further comprising an intermittently actuated fluid valve; Cuts are provided for applying interrupted bands of coating material.

Two embodiments of the applicator head according to the invention are:
For example, it can be used to create "skip gap" patterns used in making cigarette tipping paper, including but not limited to. Experiments have shown that according to the invention, the uncoated area is rectangular and clearly distinguishable from the coated area, the coated area is coated with a uniform thickness, and the applicator head can be operated at high speeds.

The present invention will now be described in detail with reference to the accompanying drawings, which illustrate embodiments of the invention.

FIG. 1 shows a paper ribbon with two continuous bands 1.2 of adhesive on each side of the uncoated centerline area 60. Between the pair of continuous bands 1, 2 there is an interrupted band 4 of coating material with uncoated rectangular interstitial areas 5. The point at which the individual cigarettes are cut into tips and wrappers is indicated by 7.8. For each chip vane, the cutting edges 7.7 become the end edges which are overlapped and glued together after the chip e.xi. is wrapped around the filter chip.

In FIGS. 2 and 6, the head includes a single slot 10, which is interrupted by a central portion 11. In FIGS. This is to form an uncoated centerline region 6 (see FIG. 1). Slot 10 receives a supply of hot melt adhesive flowing from inlet 12 into chamber 13 and from there through valve 14 and through passage 15 into slot 10 . Valve element 14α is controlled to start and stop by pneumatic actuator 14A. A pivot lever 16 is pivoted at a point 18 and a plate 19 projects from the bottom of the pivot lever 16 parallel to and adjacent to the slot 10.

The plate 19 has two fingers 17 projecting toward the slot 10 approximately at the center of each half-length slot when the slot 10 is divided into two halves. Since the spring 20 biases the pivoting lever 16 clockwise (as viewed in FIG. 2), the finger 17 is normally closed across the bottom of the slot 10 (see FIG. 6).
. The rotational force A wheel 21 acts on the cam follower roller 22 mounted on the pivot lever 16 to intermittently swing the pivot lever 16 counterclockwise and retract the finger 17 from the normal position. As a result, the two half-length slot portions are completely opened. By intermittently retracting the finger 17 in this way, the intermittent band 4 of the coating material □
(see Figure 1), while in the always fully open portion of the slot 10 a continuous band 1 of coating material is formed.
．． 2 is formed. The direction in which the paper ribbon moves is indicated by arrow A in FIG. FIG. 4 shows the profile of the applicator body adjacent slot 10. FIG. The applicator body has a narrow elongated surface 10a that the coated ribbon contacts as it passes therethrough.

On one side of the slot 10, the applicator body faces 1
It is cut down from the plane of Oa to provide space in which the plate 19 and its fingers 17 can move. Fourth
In the normal state with the fingers 17 in the closed position as shown, the ends of the fingers 17 abut one wall of the slot 10 and the top surface of the fingers 17 abuts the sloped bottom surface of the cutout in the applicator body. are in contact with each other.

In FIGS. 5 and 6, the head includes two nozzles placed back to back on opposite sides of a thin gauge plate separator ξ. The first nozzle corresponds to the slot 10 of FIGS. 2 and 6, and common parts are provided with the same reference numerals. However, slot 10 is
It is interrupted at 11 to form an uncoated centerline region 6, as well as at 51.5 to form a coated interrupted band.
It is also interrupted at position 1. Thus, on each side of the centerline region B, the thrower 10 has 52 completely open sections forming continuous bands 1, 2.

Interrupted slot 10 connects gauge plate separator 6
0, while on the other side of the separator 30 there are two throwers (32+32) having the same width as the slot 10 at the interruption position 31 of the slot 10.
．． 31. Slot 62 is independently supplied with adhesive which flows from inlet 66 to chamber filter 4 and from there via fluid valve 65 through passageway 36 and into slot 32 . By intermittently opening and closing the valve 35 by the pneumatic actuator 35b, the adhesive flows intermittently into the slot 32 and forms an interrupted band 4 of coating material on the paper ribbon traveling in the direction of the arrow. Valve 65 includes a valve member 65α that slides freely on valve stem 35ff, and a piston 35d at the end of valve stem 65C slides within a hole 35g formed in the end of valve member 35α. In operation, when the valve stem 65C moves upward, the valve member slot 5α first engages on the valve seat, closing the passageway and stopping the flow of adhesive. Piston 35d then continues to move upwardly within hole 35e, causing passageway 66
creating a partial vacuum region at the upstream end of the passageway 3
The adhesive remaining in the slot filter 6 is prevented from flowing out from the slot filter 2.

When using the applicator head according to either embodiment, the finger 17 (in the case of the first embodiment) or the valve 6
5 (in the case of the second embodiment) by opening and closing the slot 10 or the slot filter 2, the operation can be performed reliably and quickly.
A sharp flow of coating material can be achieved.

[Brief explanation of drawings]

Figure 1 is a plan view showing the state in which adhesive is coated with skip, gap j and ξ turns on a paper ribbon to be divided into tobacco chips and 4-parts. 1 is a side view showing a first embodiment of an applicator head 9 of the invention for coating a ribbon; FIG.
This is true in some respects. FIG. 6 is a cross-sectional view of t1 in FIG. 2. FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a side view showing a second embodiment of the applicator head of the present invention, with some parts cut away. FIG. 6 is a bottom view of the applicator head 9 of FIG. 5. Purification of the drawing (no change in content) JP-A-59-10359 (5) /4b Procedural amendment! (Method) May 73, 1980 Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office 1, Indication of the case 1988 Patent Application No. 2129 Coating Applicator Head 6, Person making the amendment Relationship to the case Applicant Address Name Dynamelt (1981) Limited 4
, Agent 5, Date of amendment order: April 26, 1982 (shipment date) As per paper 811 (note that there is no change in the contents of the drawings) 382
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Claims (7)

[Claims] (1) A coating applicator head for applying a coating material to a traveling ribbon,
comprising ejection slots arranged transversely to the running direction of the ribbon and adapted to apply the coating material in a small number (one continuous band) along the ribbon, adjacent to said continuous band (1 or 2); A coating applicator head further comprising a device for intermittently opening and closing said discharge slot (10) to apply interrupted bands (4) of coating material. (2) only one ejection slot is provided;
Applicator head for coating foreplants according to claim 1, characterized in that the device comprises a finger (17) positioned transversely to the discharge slot and retractable from that position. (3) said single ejection slot (10) + central part (1
1), said finger (17) being positioned across the middle of each half-length slot portion of said ejection slot (10). Coating applicator head as described in section. (4) said finger projects from a plate (19) adjoining and extending parallel to (10), said plate (19) being mounted on a pivoting lever (16); The pivot lever (16) is intermittently swung by a cam and a cam follower mechanism so that the finger (19) can be intermittently retracted from a position across the ejection slot (10). Coating applicator head 9° according to claim 2 or 6, characterized in that: (5) a first ejection slot (10), said ejection slot being interrupted at a longitudinal position (61) so as to apply a pair of continuous bands (1, 2) of coating material on the ribbon; , a second ejection thrower (32) disposed parallel to and in close proximity to said first ejection slot (10) and positioned to align with said interrupted position (61).
and the device includes a second discharge thrower) (32).
Claim 1, characterized in that the fluid valve (65) is operated intermittently.
Coating applicator head as described in section. (6) The first ejection slot (10) has a central portion (1
1) and is also interrupted at a position (61) in the middle of each half-length slot formed by said interruption, said second discharge thrower) (32) being interrupted at said position (32).
The coating applicator head 9° according to claim 5, characterized in that the coating applicator head 9° is provided in close contact with the (7) The fluid valve (35) is an upstream end of a passage (66) leading from the fluid valve (65) to the second discharge thrower (32) when the fluid valve (65) is closed. The coating ablator head 8° according to claim 5 or 6, characterized in that it is configured to form a partial vacuum region in the coating ablator head 8°.