GB1594605A - Glueing of sheet material - Google Patents

Description

(54) IMPROVEMENTS IN OR RELATING TO GLUEING OF SHEET MATERIAL (71) We, J. HOWITT & SON LIMITED, a British Company of Barlock Road, Basford, Nottingham do hereby declare the invention for which we pray that a Patent may be granted to us and the method by which it is to be performed to be particularly described in and by the following statement: The present invention is concerned with improvements in or relating to the glueing of sheet material and is particularly concerned with a method of glueing printed sheet material such as may be printed for the formation of a book.

It will be appreciated that books may be formed by folding sheets of printed material in concertina fashion so that the pages are formed by adjacent parts of the sheet being glued back to back so as to ensure that the pages are formed with the printed material in a face to face relationship.

However, if such a book to be formed has cut-outs, provided therein, and such books are known, for example, childrens educationsl books, then it will be appreciated that conventional glueing methods in which a lick roller applies glue over the whole area of the sheet may not be employed because it will involve the glueing of the portion to be removed.

Alternatively if the cut-out had been removed prior to the glueing, glue would then seep round the edges and onto the front face of the page and perhaps spoil the printed matter, or alternatively, when the book was folded up the glue would still be wet and would glue the pages together in their face to face relationship in addition to the back to back relationship.

The present invention is also concerned with the selective glueing of sheets of printed material which are to be joined together other than for the formation of books, for example, for prize draw cards where a portion of a sheet may be removable to disclose a number such as a winning number printed onto another sheet.

In such circumstances it is necessary selectively to glue the two sheets together but the portion of the first sheet which is to be removed must of course not be glued to the sheet beneath it which contains the winning number.

There are many other applications in the printing and allied trades requiring the selective glueing of sheets to one another.

It is therefore an object of the present invention to provide a method of selectively glueing sheets of material together in which the sheets may be required to form pages of a book having cut-outs which are removed or removable from said pages or for other desired purposes.

The present invention provides a method of applying glue selectively to sheets of material as for example printed material which comprises feeding the sheet of material to a rotating roller, which roller has a raised surface thereon conforming to the parts of the sheet to which glue is to be applied and which has depressions therein conforming to those parts of the sheet to which glue is not to be applied, contacting said roller with another roller to which glue has been applied, rotating said two rollers at the same peripheral speed and in which the roller which applies glue selectively to the sheet has a plurality of circumferencial grooves formed therein in which a finger is engaged to assist in the removal of the sheet from the peripheral surface of the said glue applying roller.

The present invention also provides for apparatus for the selective glueing of a sheet of material which is to be applied to another sheet of similar material such as for example sheets of paper or card which apparatus comprises a machine having at least one roller provided with a raised surface corresponding to those parts of the sheet to which glue is to be applied and with depressions corresponding to those parts of the sheet which glue is not to be applied, means for applying glue to said raised parts of the roller and means for bringing the roller into contact with a sheet as it passes through the said machine.

In the present invention the application of glue may be made in a conventional roller glueing machine in which a glue application roller is brought into rotating contact with a glue apply- ing roller, which in turn is in contact with one or more rollers themselves in contact with a bath containing the glue. Thus the glue is evenly spread over the roller which is applying the glue to the sheet of paper.

Normally such a roller will have a uniform surface but according to the present invention a stencil is applied to said surface which has indentations therein conforming to those areas in the sheet to which glue is not to be applied.

The stencil may for example be in the form of a rubber blanket or rubber sheet of the kind used in litho-printing machines, which has had the area to which glue is not to be applied removed thereform, as for example by cutting with a knife or similar.

The roller will be a steel roller and the blanket is applied to a surface therein and brought into exact register with the sheet which is to be glued.

It will be appreciated that the roller which is applying glue to the roller on which the stencil is applied must be rotating at the same speed in order to ensure that there is no spread of glue into those areas on the stencil where those depressions occur.

Furthermore the stencil height and diameter of the stencil roller must be so determined that the peripheral speed of the roller exactly matches the speed of the impression cylinder carrying the sheet to be glued.

In order that the present invention may be more readily understood reference is now made to the accompanying drawings in which Figures 1 and 2 illustrate a machine in perspective and in exploded diagrammatic form for the selective application of glue to a single sheet of material.

Figures 3 and 4 illustrate a machine and an exploded diagrammatic view for the bonding together of two initially separate sheets of material and Figures 5, 6 and 7 illustrate both in perspective and diagrammatic and crosssectional view for the extension roller machine for selectively applying glue to a sheet of material. The machines described with reference to Figures 1 and 2, and 3 and 4 are conventional machines which illustrate examples only of different arrangements of sheet glueing.

Referring firstly to Figures 1 and 2. A machine is indicated generally at 1 which is a roller glue applying machine and is provided with a glue application roller 6 which will be in contact with a stencil cylinder 3 which has a blanket or like applied thereto so as to provide for a raised surface with indentations 4, which will be contacted by the glue roller 6 to apply glue selectively by virtue of the indentations 4.

Roller 5 is a smaller diameter than a roller 6 although rotating at the same rotational speed.

The glue is introduced between rollers 5 and 6 which is illustrated on Figure 2. Roller 5 is adjustable towards or away from roller 6, thus controlling the thickness of glue coat.

An impression cylinder 8 is provided so that as a sheet 7 is fed between the stencil cylinder 3 and the impression cylinder 8 glue will have been selectively applied to a sheet 7A emerging from the machine and the shaded portions on sheet 7A indicate the areas to which glue has been applied.

According to sheet 7A the sheet may be folded about the line 2 2 so that the portions indicated on the sheet 7A as 7B may previously have been scored or perforated overlie non glued squares 7C which may contain printed matter. Thus when the sheet is assembled and folded over the cut-out portion 7B may be removed exposing any printed matter in the area 7C.

In Figures 3 and 4 a machine is illustrated at 10 having a sheet table 20 feeding into the machine. The machine comprises an impression cylinder 13 which serves to carry a sheet of material B fed in at the bottom of the machine around the cylinder 13 which has grippers to locate it so as to bring the sheet B in contact with the stencil cylinder 14.

The stencil cylinder 14 will be of a similar kind to that of cylinder 3 in Figure 2 and has the appropriate areas of the cylinder provided with raised portions so that glue is fed only to said raised portions.

The glue is fed from a bath 18 by a roller 17 contacting a roller 16 which spreads glue on to roller 15 which in turn applies glue to the roller 14. The sheet B thus is covered with glue in the selected areas. A second sheet A is then fed to the glued surface of sheet B and the-two sheets are then compressed together between the impression cylinder 13 and rollers 11 and 12 so that the sheet emerging at 21 will be of laminated form as illustrated in Figure 4A, with sheets A and B secured together at the interface B-.

In Figures 5, 6 and 7 a further machine is illustrated which is more suitable for the selective glueing of areas on large sheets of material such as may be suitable for folding in concertina fashion to form the pages of a book of the kind manufactured according to our co-pending patent application 41394/76 (Serial No.

1 585 468).

The machine illustrated in Figure 5 at 30 provides a table 31 for feeding in the sheet to be selectively glued. The glue is applied thereto.

Roller 34 has a blanket 39 stretched thereon which will have cutouts formed therein to designate those areas to which glue is not to be applied.

Grooves 42 are provided, running circumferentially of the roller in order to assist in the peeling of a large sheet of material from the blanket 39 as herein after described.

The sheet to be glued will be fed to the roller and passes over the roller 34 and beneath an impression cylinder 33 and thence on to delivery belt 32. Glue from a glue duct 38 is fed to the roller 34 by the intermediary of rollers 37 and 36. Engaging into the grooves 42 in the blanket 39 are fingers 41 mounted on a rod 40.

The fingers 41 engage beneath the surface of the blanket 39 in grooves 42 so as to engage beneath the surface of the sheet which is being fed to the roller 34 in order to lift the sheet from the blanket and ensure it is fed to the de livery 32.

It will be appreciated that the method of applying glue selectively to a sheet of paper as herein described may have applications other than that of applying to a sheet of paper with cut-outs formed therein for forming into a book. For example it may have application to selectively applying glue to sheets to be folded for gaming envelopes and for numerous other purposes.

It is thought that the present invention provides a novel and useful way of applying glue selectively to sheets of paper.

WHAT WE CLAIM IS: 1. A method of applying glue selectively to sheets of material as for example printed material which comprises feeding the sheet of material to a rotating roller, which roller has a raised surface thereon conforming to the parts of the sheet to which glue is to be applied and which has depressions therein conforming to those parts of the sheet to which glue is not to be applied, contacting said roller with another roller to which glue has been applied, rotating said two rollers at the same peripheral speed and in which the roller which applies glue selectively to the sheet has a plurality of circumferencial grooves formed therein in which a finger is engaged to assist in the removal of the sheet from the peripheral surface of the said glue applying roller.

2. The method according to Claim 1 wherein the roller having a raised surface thereon includes a rubber blanket in which portions have been removed to form the depressions therein.

3. The method according to any of the preceding claims in which the sheet to which glue is to be applied is fed between the roller having raised portions and depressions therein and in impression cylinder to press the sheet on to said glue applying roller.

4. The method of applying glue selectively to sheets of material substantially as described and illustrated herein with reference to the accompanying drawings.

5. Apparatus for the selective applying of glue to sheets of material substantially as described and illustrated herein with reference to Figures 5, 6 and 7 of the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. livery 32. It will be appreciated that the method of applying glue selectively to a sheet of paper as herein described may have applications other than that of applying to a sheet of paper with cut-outs formed therein for forming into a book. For example it may have application to selectively applying glue to sheets to be folded for gaming envelopes and for numerous other purposes. It is thought that the present invention provides a novel and useful way of applying glue selectively to sheets of paper. WHAT WE CLAIM IS:

1. A method of applying glue selectively to sheets of material as for example printed material which comprises feeding the sheet of material to a rotating roller, which roller has a raised surface thereon conforming to the parts of the sheet to which glue is to be applied and which has depressions therein conforming to those parts of the sheet to which glue is not to be applied, contacting said roller with another roller to which glue has been applied, rotating said two rollers at the same peripheral speed and in which the roller which applies glue selectively to the sheet has a plurality of circumferencial grooves formed therein in which a finger is engaged to assist in the removal of the sheet from the peripheral surface of the said glue applying roller.

2. The method according to Claim 1 wherein the roller having a raised surface thereon includes a rubber blanket in which portions have been removed to form the depressions therein.

3. The method according to any of the preceding claims in which the sheet to which glue is to be applied is fed between the roller having raised portions and depressions therein and in impression cylinder to press the sheet on to said glue applying roller.

4. The method of applying glue selectively to sheets of material substantially as described and illustrated herein with reference to the accompanying drawings.

5. Apparatus for the selective applying of glue to sheets of material substantially as described and illustrated herein with reference to Figures 5, 6 and 7 of the accompanying drawings.