IL112729A

IL112729A - Glue dispenser

Info

Publication number: IL112729A
Application number: IL11272991A
Authority: IL
Original assignee: Perini Fabio Spa
Priority date: 1990-10-17
Filing date: 1991-10-04
Publication date: 1996-08-04

Description

GLUE DISPENSER This application for Patent has been divided out of the co-pending Parent Application No. 99654 to which reference may be had concerning the field and the background of the invention.

The invention refers to a glue dispenser, especially but not exclusively for use in an apparatus for glueing the tail of logs or rolls of web material, comprising a tubular container provided with means defining a slit from which the glue is dispensed, and means for feeding the glue to said tubular container. A storage tank may be provided below the container to collect the glue overflowing from said slit. Advantageously the storage tank may be connected to a glue reservoir into which the glue collected by said tank is readmitted to let it into the tubular container afterwards. Said reservoir may be located at such a height that the difference between the level of glue inside the reservoir and the height of the dispenser slit will allow the glue to flow through the latter.

DETAILED DESCRIPTION The Invention will be better understood by following description and the attached drawing, which shows a feasible, not limiting, embodiment of the same invention. In the drawings: Fig. 1 shows a cross-section view of the glue dispenser.

Fig. 2 shows a section taken on line V-V of Fig. 1, and Figs. 3 and 4 are schematic views of the two embodiments of the glue dispenser system.

The glue-applying means 45 are shown in detail in Figs. 1 and 2.

Substantially, these means comprise a dispenser 53 made up of a tubular-shaped container 55 which has a square cross-section and is provided with holes 57 on top. The holes 57 of the tubular container 55 lead into a wedge-shaped spout 59 formed by a pair of inclined plates 61 which define at their top a slit 63 from wh ch the glue is delivered. The slit 63 is disposed in alignment with a log or roll rolling surface 65 for the application of the glue in a manner to be described later on. The position of the slit 63 with respect to the surface 65 can be seen in detail in Figs. 1 and 2, wherein the dispenser device 53 is schematically represented. As shown in particular in Fig. 1, one of the two plates 61 is fixed on the tubular container 55, while the other may be adjusted in position in the direction of arrow f61 by means of a series of set screws 69 which engage into bushes 71 fixed to the relevant plate 61. Shapes 72 (Fig. 2) are provided to guide the motion of the plate 61 during adjustment.

The tubular container 55 extends throughout the width of the apparatus, while the slit 63, defined by the plates 61, extends to an extent approximately equal to the axial development of the logs to be glued.

Disposed beneath the tubular container 55 is a storage tank 73 mounted by brackets 75 to the sides 77 (Fig. 2) of the apparatus .

The brackets 75 are provided with slots 79 for the passage of screw means 81 therethrough; said screw means are provided for a clamping engagement to the machine frame al lowing the assembly made up of tank 73 , container 55 and plates 61 to be adjusted in height.

The adjustment is carried out by means of set screws 83. The tank 73 has a lateral ly (to the right in Fig. 3) incl ned bottom and is provided with a pipe fitting 85 at the lowest point thereof for connection to a conduit 87 from which the gl ue collected within the tank 73 is taken out and made to re-circulate in a manner to be described l ater on.

Conduits 91 are joined to the tubular container 55 for the inflow of glue inside the said tubula container 55. The glue is drawn out through the condui ts 91 from a reservoir, in which the glue surface reaches a level higher than the sl it 63 defined by plates 61 fixed to the tubul ar container 55. In thi s way, the glue contained in the reservoir may flow through the conduits 91 into the tubular container 55 and come out by overflowing from the sl it 63 because of the difference in height between the gl ue surface inside the reservoir and the feeding sl it 63. The flow rate of gl ue may be easily adjusted by varying the difference in height. Advantageously, the glue is made to flow continuously, and the excess of glue overflowing or overfall ng from the sl it 63, and which is not appl ied to the log as described later on, col lects in the underlying storage tank 73 to be recovered through the conduit 87 and re-circulated into the reservoi by a suitabl e pumping means. The arrangement of reservoir and conduit 91 with respect to the glue-feeding device i s al so schematically depicted in Fig. 3 which shows a glue-recircul ati ng pump 92.

The del ivery of glue may al so take pl ace in a different way, with an arrangement of the type shown in Fig . 4. In this embodiment, the glue reservoir, designated 93' , is disposed at a lower level with respect to the del ivery sl it 63 and to the tubular container 55. The excess of glue col lected in the tank 73 is directly introduced into the reservoir 93' through the conduit 87. From this reservoir, the glue is drawn out by a constant-flow rate pump 94, to be fed into the tubular container 55 via the donduit 91 ' .

Claims

CLAIMS :

1. A glue dispenser, especial ly for use in an apparatus for glueing the outer end of logs or roll s of web material , characterized in that it compri ses a tubular container (55) provided with means (61) defining a sl it (63) from which the gl ue is dispensed, and means (91) for feeding the glue to said tubular container (55) and, from this , to said sl it (63) .

2. A gl ue dispenser according to claim 1 , characterized in that it comprises a storage tank (73) located beneath the tubular container (55) , to col lect the gl ue overflowing from said sl it (63) .

3. A dispenser according to claim 2, characterized in that the storage tank (73) is connected to a glue reservoir (93) , in which the gl ue col lected b said tank is re-introduced for its subsequent feeding into the tubular container (55) .

4. A dispenser according to claim 3, characterized in that said reservoir (93) is disposed at such a level -that the glue is made to flow out through the dispenser sl it by the difference in height between the sl it (63) and the glue level inside the reservoir (93) .

5. A glue dispenser, substantially as hereinbefore described and shown in the accompanying drawings. COHEfl ZEDEK & RAPAPORT P.O. BOX 33116, TEL AVIV ATTORNEYS FOR APPLICANT