CA1090688A - Method and apparatus for laminating planar and corrugated surface defining layers of sheet material - Google Patents
Method and apparatus for laminating planar and corrugated surface defining layers of sheet materialInfo
- Publication number
- CA1090688A CA1090688A CA302,684A CA302684A CA1090688A CA 1090688 A CA1090688 A CA 1090688A CA 302684 A CA302684 A CA 302684A CA 1090688 A CA1090688 A CA 1090688A
- Authority
- CA
- Canada
- Prior art keywords
- adhesive
- lines
- roll
- ridges
- applicator roll
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
METHOD AND APPARATUS FOR LAMINATING PLANAR AND CORRUGATED SURFACE DEFINING LAYERS OF SHEET MATERIAL Abstract of the Disclosure According to the method, the corrugated surface defin-ing layer is passed about a carrier roll having a pressure dir-ferential thereacross to retain the layer thereon, the carrier roll is rotated in juxtaposition with an adhesive applicator roll, and while the adhesive applicator roll is rotated, an adhe-sive is repeatedly successively deposited on the applicator roll in spaced parallel lines crosswise of the ridges of the corru-gates surface defining layer, the lines of adhesive and the ridges are contacted with one another so that portions of the lines are deposited on the ridges in series of spaced, pressure deformable spots of adhesive extending along the lengths of the ridges, and the balance of the lines of adhesive is removed from the applicator roll to a neutral zone separate from the layers. Additionally, the planar surface of the other layer is contacted with the series of spots and the two layers are pressed together so that they splay the respective spots into the spaces there-between and form substantially continuous lines of adhesive along the lengths of the ridges, by which the two layers bond together including at points on the planar surface of the other layer coinciding with the spaces between the spots.
Description
lO9V~;88 P 12 METHOD AND APPARATUS FOR LAMINATING
PLANAR AND CORRUGATED SURFACE DEFINING
LAYERS OF SHEET MATERIAL
Related APplication This Application is based in part on our copending Application Serial No. 255,859, entitled ME~HOD OF LAMINATING
PLANAR AND CORRUGATED SURFACE DEFINING LAYERS OF SHEET MATERIAL
filed June 28, 1976.
The Invention in General In the above Application, a method and apparatus are disclosed for laminating two or more layers of sheet material, one of which has a corrugated surface thereon and the other of which has a planar surface thereon. According to the method, the corrugated surface def ining layer is passed about a carrier roll -having a pressure differential thereacross to retain the layer ~
thereon, and the carrier roll is rotated in juxtaposit~on with an ~ `
, . .
adhesive applicator roll having spaced, parallel lines of adhe- ;
sive formed thereon crosswise of the ridges of the corrugated surface defining layer. The applicator roll is also rotated and while it is rotated, the lines of adhesive and ridges are con-tacted with one another so that portions of the lines are depos- -~
ited on the ridges in series of spaced, pressure deformable spots of adhesive extending along the lengths of the ridges. There-after the planar surface of the other layer is contacted with the series of spots and the two layers are pressed together so that they splay the respective spots into the spaces there~etween and form-substantially continuous lines of adhesive along the lengths of the ridges by which the two layers bond together, including at -1- ~
0f~88 P 12 points on the planar surface of the other layer coinciding with the spaces between the spots.
According to the present invention, while the adhesive applicator roll is rotated, the adhesive is repeatedly succes-sively deposited on the applicator roll in the foregoing lines crosswise of the ridges of the corrugated surface defining layer, the lines and ridges are contacted with one another so that por-tions of the lines are deposited in the foregoing series of spots on the ridges of the corrugated surface defining layer, and the balance of the lines of adhesive is removed from the applicator roll to a neutral zone separate from the layers. In this way, the lines of adhesive on the applicator roll are renewed from time to time, and if desired, the removed adhesive can be renewed in character and reused in whole or in part to form the new lines.
Preferably, the lines of adhesive are renewed over the course of each 360 rotation of the applicator roll, and the removed adhe-sive is renewed in character and reused in full to form new lines. For example, where the adhesive is of a type which requires that it be preheated to a fluid condition before it is deposited on the applicator roll, preferably the removed adhesive is reheated to renew the fluid condition of it, and then it is reused in forming new lines on the roll. The adhesive may also be filtered before it is reheated and reused.
In the presently preferred embodiments of the inven-tion, the adhesive is deposited on the applicator roll in the foregoing lines, the lines and ridges are contacted with one another, and the balance of the lines is removed from the appli-cator roll in continuous sequence at angularly spaced intervals about the axis of rotation of the roll. ~he adhesive is deposited on the applicator roll by discharging it in streams of ~0~ND~ 8~ P 12 the same which are adapted to impinge on the roll along spaced, parallel lines extending about the roll crosswise of the ridges of the corrugated surface defining layer. The adhesive is dis-charged in such streams by extruding it from a series of orifices which are spaced apart from one another opposite the applicator roll at a location spaced rotationally ahead of the location at which the lines of adhesive on the applicator roll are contacted with the ridges of the corrugated surface defining layer. The adhesive is removed from the applicator roll by doctoring it off with a rectilinearly edged blade which is slidably engaged with the roll at a location spaced rotationally after the foregoing location at which the lines of adhesive on the applicator roll are contacted with the ridges of the corrugated surface defining layer.
In one of the presently preferred embodiments of the invention, the adhesive is of the hot melt type and is heated to a fluid condition and forced by a pump into an apertured manifold under a pressure at which it extrudes from the apertures of the manifold in the direction of the applicator roll. The removed 20 adhesive is collected in a sump when it is doctored off of the ~-~
applicator roll, and the pump is connected with the sump to recirculate the collected adhesive to the manifold. The collected adhesive is also reheated between the sump and the pump to renew the fluid condition of the adhesive; and the manifold is heated to sustain the fluid condition of the adhesive therein.
Preferably, the pump is a variable speed pump and the rate at which the adhesive is discharged from the manifold is controlled by varying the speed of the pump. In practice, moreover, the rate is controlled so as to be commensurate with the speed of rotation of the applicator roll.
10~8~ 3 288 In the apparatus of the present invention, there is a rotatably mounted carrier roll, means for passing the corrugated surface defining layer about the carrier roll, means for generat-ing a pressure differential across the carrier roll to retain the corrugated surface defining layer thereon, and an adhesive appli-cator roll which is mounted to rotate in juxtaposition with the corrugated surface defining layer. There are also means for depositing adhesive on the applicator roll in spaced, parallel lines crosswise of the ridges of the corrugated surface defining layer, means for contacting the lines of adhesive and the ridges with one another so that portions of the lines are deposited on the ridges in series of spaced, pressure deformable spots of adhesive extending along the lengths of the ridges, and means for ~
removing the balance of the lines of adhesive from the applicator roll to a neutral zone separate from the layers. There are means for contacting the planar surface of the other layer with the series of spots and presRing the two layers together so that they ~play the respective spots into the spaces therebetween and form substantially continuous lines of adhesive along the lengths of the ridges by which the two layers bond together, including at points on the planar surface of the other layer coinciding with the spaces between the spots.
In the presently preferred embodiments of the appa-ratus, the adhesive depositing means, the adhesive spot forming means, and the adhesive removal means are operable during the rotation of the applicator roll to deposit the adhesive on the applicator roll in the foregoing lines, contact the lines and ridges with one another, and remove the balance of the lines from the applicator roll in continuous sequence at angularly spaced intervals about the axis of rotation of the roll. The adhesive - 1090~88 3 2B8 depositing means include means for discharging the adhesive in streams of the same which are adapted to impinge on the roll along spaced, parallel lines extending about the roll crosswise of the ridges of the corrugated surface defining layer. The adhesive discharge means include means which define a series of orifices that are spaced apart from one another opposite the applicator roll at a location spaced rotationally ahead of the location at which the lines of adhesive on the applicator roll are contacted with the ridges of the corrugated surface defining layer, and means for extruding the adhesive from the orifices in the foregoing streams of the same as indicated. The adhesive removal means include a rectilinearly edged blade which is slid-ably engagable with the applicator roll to doctor off the balance ;
of the lines of adhesive at a location spaced rotationally after ~-the foregoing location at which the lines of adhesive are con- -~
tacted with the ridges of the corrugated surface defining layer. ~ -~
In one of the presently preferred embodiments of the apparatus which i8 especially useful with a hot melt type of adhesive, the orifice defining means takes the form of an aper-tured manifold, and there are means including a pump connectedwith the manifold for heating the adhesive to a fluid condition and pumping the adhesive into the manifold under a pressure at which it extrudes from the apertures of the manifold in the direction of the applicator roll. There are also means defining a sump for collecting the adhesive when it is doctored off of the applicator roll, and a connection between the sump and the pump by which the collected adhesive can be recirculated to the mani-fold. Additionally, there are means for reheating the adhesive between the sump and the pump to renew the fluid condition of the adhesive; and means for heating the manifold to sustain the fluid 1090~ 3 288 condition of the adhesive therein. Also, normally the pump is a variable speed pump and there are means operable to vary the speed of the pump in response to variation in the speed of the applicator roll so as to maintain the rate at which the adhesive is supplied to the manifold commensurate with the speed of the applicator roll.
Brief DescriPtion of the Drawing These features will be better understood by reference to the accompanying drawing which illustrates the latter embodi-ment of the invention wherein a hot melt adhesive is extrudedfrom an apertured manifold onto the applicator roll of the lami-nating apparatus.
In the drawing, FIGURE 1 is a part perspective view of the laminating apparatus;
FIGURE 2 is a part end elevational view of the manifold-fed applicator roll in the apparatus; and FIGURE 3 is a part side elevational view of the roll.
Description of the Preferred Embodiment Referring to the drawing, it will be seen that the laminating apparatus employs two webs of paper 2 and 4, and in the process, the web 2 is given a corrugated body configuration and becomes the corrugated layer of the laminar composite 6, while the web 4 remains planar and becomes the facing layer of the composite. Since a hot melt adhesive is employed in the pro-cess, the webs need not be subjected to steam preheating, but means are provided at 8 for this purpose in the event some other adhesive is employed.
The web 2 is given a corrugated body configuration by passing it through the nip 10 (FIGURE 1~ between a pair of hollow, sinisoidally contoured, power driven corrugating rolls 12 109~88 3 2828 and 14 which are juxtaposed in parallel but vertically staggered relationship to one another and mated together in conventional fashion at the nip. The upper web receiving roll 12 is driven in the counter clockwise direction, as indicated in FIGURE 1, whereas the lower web discharging roll 14 is driven in the clock-wise direction. The lower roll is also equipped with a vacuum means 16, including a vacuum generator 17, for temporarily retaining the corrugated layer web 2 on the exterior surface 13 of the roll after the web has exited from the nip 10 with its ~~
corrugated body configuration. The vacuum means 16 is also operative to maintain the corrugated layer web 2 in close registry with the contour of the surface 18, and the web 2 is maintained in this condition while the ridges 20 of the same are spotted with adhesive and the webs 2 and 4 are laminated with one another at the ridges. The adhesive is applied to the ridges of the web 2 by a hollow, cylindrical, power driven adhesive appli- -cator roll 22 which is mounted in parallel juxtaposition to the roll 14 and contacted with the ridges 20 while the web 2 is sub-ject to the vacuum in the roll 14. The webs 2 and 4 are laminated thereafter by a pressure roll 24 which is in receipt of the facing layer web 4 and rotatably mounted in parallel juxta-position with the roll 14 so as to feed the facing layer web in the direction of travel of the corrugated layer web, and to bond the facing layer web to the ridges of the corrugated layer web as the latter exits from its path of travel around the roll 14.
Afterward, the laminar composite 6 is reversed in direction and if desired, fed into a second lamination stage (not shown) where a second facing layer web is bonded to the composite in a some-what similar manner but on the opposite side of the web 2, as explained in the earlier Application.
3 2~8 ~OYH~U~ P 12 The adhesive applicator roll 22 is mounted so as to be co-extensive with the lower corrugating roll 14 in the axial direction thereof, and is driven in the counter clockwise direc-tion as indicated. The outside surface 26 of the roll is plain and smooth, and according to the invention, while the applicator roll is rotated, the hot melt adhesive is repeatedly successively deposited on the roll in spaced parallel lines 28 crosswise of the ridges 20 of the corrugated surface defining web 2, the lines and ridges are contacted with one another so that portions of the lines are deposited on the ridges in the aforementioned series of spots, and the balance of the lines is removed from the roll to a neutral zone 32 separate from the webs. See FIGURE 2. The adhe-sive is deposited on the applicator roll by a satellite system 34 which discharges the adhesive in streams 36 of the same that are adapted to impinge on the surface 26 of the roll along spaced parallel lines extending about the roll crosswise of the ridges of the web. The streams are formed by extruding the adhesive from a series of orifices 38 that are spaced apart from one another opposite the roll at a location spaced rotationally ahead of the location at which the lines 28 of adhesive on the roll are contacted with the ridges 20 of the web. The adhesive is removed from the applicator roll by doctoring it off with a rectilinearly edged blade 40 which is slidably engaged with the roll at a loca-tion spaced rotationally after the foregoing location at which the lines 28 of adhesive on the applicator roll are contacted with the ridges 20 of the web. Thus, the adhesive is deposited on the roll in the foregoing lines 28, the lines and ridges 20 are contacted with one another, and the balance of the lines is removed from the roll in continuous sequence at angularly spaced intervals about the axis of rotation of the roll 22.
lOYHD~U~ 3 288 More specifically, in the illustrated arrangement, the adhesive is heated to a fluid condition and pumped at 42 into an apertured manifold 44 under a pressure at which it extrudes from the apertures 38 of the manifold in the direction of the applica-tor roll. Also, the removed adhesive is collected in a sump 46 when it is doctored off of the applicator roll, and the pump 42 is connected with the sump to recirculate the collected adhesive to the manifold. The collected adhesive is also reheated between the sump and the pump to renew the fluid condition of the adhe-sive; and the manifold is heated to sustain the fluid conditionof the adhesive therein. The connection between the pump and the manifold is seen at 47; the connection between the sump and the pump is seen at 48; and the means for reheating the adhesive are associated with the pump unit at 42 as indicated. The means for heating the manifold ta~e the form of a pair of heater tubes 50 which are contiguous to and co-extensive with the manifold on opposite sides thereof in a plane perpendicular to the discharge path of the streams 36.
As indicated earlier, the pump 42 is normally a vari-able speed pump, and there are means 52 interconnected betweenthe pump and the applicator roll to vary the speed of the pump in response to variation in the speed of the applicator roll, so as to maintain the rate at which the adhesive is supplied to the manifold commensurate with the speed of the applicator roll.
Normally, the pump and reheater unit 42 also includes means for filtering the adhesive as indicated.
PLANAR AND CORRUGATED SURFACE DEFINING
LAYERS OF SHEET MATERIAL
Related APplication This Application is based in part on our copending Application Serial No. 255,859, entitled ME~HOD OF LAMINATING
PLANAR AND CORRUGATED SURFACE DEFINING LAYERS OF SHEET MATERIAL
filed June 28, 1976.
The Invention in General In the above Application, a method and apparatus are disclosed for laminating two or more layers of sheet material, one of which has a corrugated surface thereon and the other of which has a planar surface thereon. According to the method, the corrugated surface def ining layer is passed about a carrier roll -having a pressure differential thereacross to retain the layer ~
thereon, and the carrier roll is rotated in juxtaposit~on with an ~ `
, . .
adhesive applicator roll having spaced, parallel lines of adhe- ;
sive formed thereon crosswise of the ridges of the corrugated surface defining layer. The applicator roll is also rotated and while it is rotated, the lines of adhesive and ridges are con-tacted with one another so that portions of the lines are depos- -~
ited on the ridges in series of spaced, pressure deformable spots of adhesive extending along the lengths of the ridges. There-after the planar surface of the other layer is contacted with the series of spots and the two layers are pressed together so that they splay the respective spots into the spaces there~etween and form-substantially continuous lines of adhesive along the lengths of the ridges by which the two layers bond together, including at -1- ~
0f~88 P 12 points on the planar surface of the other layer coinciding with the spaces between the spots.
According to the present invention, while the adhesive applicator roll is rotated, the adhesive is repeatedly succes-sively deposited on the applicator roll in the foregoing lines crosswise of the ridges of the corrugated surface defining layer, the lines and ridges are contacted with one another so that por-tions of the lines are deposited in the foregoing series of spots on the ridges of the corrugated surface defining layer, and the balance of the lines of adhesive is removed from the applicator roll to a neutral zone separate from the layers. In this way, the lines of adhesive on the applicator roll are renewed from time to time, and if desired, the removed adhesive can be renewed in character and reused in whole or in part to form the new lines.
Preferably, the lines of adhesive are renewed over the course of each 360 rotation of the applicator roll, and the removed adhe-sive is renewed in character and reused in full to form new lines. For example, where the adhesive is of a type which requires that it be preheated to a fluid condition before it is deposited on the applicator roll, preferably the removed adhesive is reheated to renew the fluid condition of it, and then it is reused in forming new lines on the roll. The adhesive may also be filtered before it is reheated and reused.
In the presently preferred embodiments of the inven-tion, the adhesive is deposited on the applicator roll in the foregoing lines, the lines and ridges are contacted with one another, and the balance of the lines is removed from the appli-cator roll in continuous sequence at angularly spaced intervals about the axis of rotation of the roll. ~he adhesive is deposited on the applicator roll by discharging it in streams of ~0~ND~ 8~ P 12 the same which are adapted to impinge on the roll along spaced, parallel lines extending about the roll crosswise of the ridges of the corrugated surface defining layer. The adhesive is dis-charged in such streams by extruding it from a series of orifices which are spaced apart from one another opposite the applicator roll at a location spaced rotationally ahead of the location at which the lines of adhesive on the applicator roll are contacted with the ridges of the corrugated surface defining layer. The adhesive is removed from the applicator roll by doctoring it off with a rectilinearly edged blade which is slidably engaged with the roll at a location spaced rotationally after the foregoing location at which the lines of adhesive on the applicator roll are contacted with the ridges of the corrugated surface defining layer.
In one of the presently preferred embodiments of the invention, the adhesive is of the hot melt type and is heated to a fluid condition and forced by a pump into an apertured manifold under a pressure at which it extrudes from the apertures of the manifold in the direction of the applicator roll. The removed 20 adhesive is collected in a sump when it is doctored off of the ~-~
applicator roll, and the pump is connected with the sump to recirculate the collected adhesive to the manifold. The collected adhesive is also reheated between the sump and the pump to renew the fluid condition of the adhesive; and the manifold is heated to sustain the fluid condition of the adhesive therein.
Preferably, the pump is a variable speed pump and the rate at which the adhesive is discharged from the manifold is controlled by varying the speed of the pump. In practice, moreover, the rate is controlled so as to be commensurate with the speed of rotation of the applicator roll.
10~8~ 3 288 In the apparatus of the present invention, there is a rotatably mounted carrier roll, means for passing the corrugated surface defining layer about the carrier roll, means for generat-ing a pressure differential across the carrier roll to retain the corrugated surface defining layer thereon, and an adhesive appli-cator roll which is mounted to rotate in juxtaposition with the corrugated surface defining layer. There are also means for depositing adhesive on the applicator roll in spaced, parallel lines crosswise of the ridges of the corrugated surface defining layer, means for contacting the lines of adhesive and the ridges with one another so that portions of the lines are deposited on the ridges in series of spaced, pressure deformable spots of adhesive extending along the lengths of the ridges, and means for ~
removing the balance of the lines of adhesive from the applicator roll to a neutral zone separate from the layers. There are means for contacting the planar surface of the other layer with the series of spots and presRing the two layers together so that they ~play the respective spots into the spaces therebetween and form substantially continuous lines of adhesive along the lengths of the ridges by which the two layers bond together, including at points on the planar surface of the other layer coinciding with the spaces between the spots.
In the presently preferred embodiments of the appa-ratus, the adhesive depositing means, the adhesive spot forming means, and the adhesive removal means are operable during the rotation of the applicator roll to deposit the adhesive on the applicator roll in the foregoing lines, contact the lines and ridges with one another, and remove the balance of the lines from the applicator roll in continuous sequence at angularly spaced intervals about the axis of rotation of the roll. The adhesive - 1090~88 3 2B8 depositing means include means for discharging the adhesive in streams of the same which are adapted to impinge on the roll along spaced, parallel lines extending about the roll crosswise of the ridges of the corrugated surface defining layer. The adhesive discharge means include means which define a series of orifices that are spaced apart from one another opposite the applicator roll at a location spaced rotationally ahead of the location at which the lines of adhesive on the applicator roll are contacted with the ridges of the corrugated surface defining layer, and means for extruding the adhesive from the orifices in the foregoing streams of the same as indicated. The adhesive removal means include a rectilinearly edged blade which is slid-ably engagable with the applicator roll to doctor off the balance ;
of the lines of adhesive at a location spaced rotationally after ~-the foregoing location at which the lines of adhesive are con- -~
tacted with the ridges of the corrugated surface defining layer. ~ -~
In one of the presently preferred embodiments of the apparatus which i8 especially useful with a hot melt type of adhesive, the orifice defining means takes the form of an aper-tured manifold, and there are means including a pump connectedwith the manifold for heating the adhesive to a fluid condition and pumping the adhesive into the manifold under a pressure at which it extrudes from the apertures of the manifold in the direction of the applicator roll. There are also means defining a sump for collecting the adhesive when it is doctored off of the applicator roll, and a connection between the sump and the pump by which the collected adhesive can be recirculated to the mani-fold. Additionally, there are means for reheating the adhesive between the sump and the pump to renew the fluid condition of the adhesive; and means for heating the manifold to sustain the fluid 1090~ 3 288 condition of the adhesive therein. Also, normally the pump is a variable speed pump and there are means operable to vary the speed of the pump in response to variation in the speed of the applicator roll so as to maintain the rate at which the adhesive is supplied to the manifold commensurate with the speed of the applicator roll.
Brief DescriPtion of the Drawing These features will be better understood by reference to the accompanying drawing which illustrates the latter embodi-ment of the invention wherein a hot melt adhesive is extrudedfrom an apertured manifold onto the applicator roll of the lami-nating apparatus.
In the drawing, FIGURE 1 is a part perspective view of the laminating apparatus;
FIGURE 2 is a part end elevational view of the manifold-fed applicator roll in the apparatus; and FIGURE 3 is a part side elevational view of the roll.
Description of the Preferred Embodiment Referring to the drawing, it will be seen that the laminating apparatus employs two webs of paper 2 and 4, and in the process, the web 2 is given a corrugated body configuration and becomes the corrugated layer of the laminar composite 6, while the web 4 remains planar and becomes the facing layer of the composite. Since a hot melt adhesive is employed in the pro-cess, the webs need not be subjected to steam preheating, but means are provided at 8 for this purpose in the event some other adhesive is employed.
The web 2 is given a corrugated body configuration by passing it through the nip 10 (FIGURE 1~ between a pair of hollow, sinisoidally contoured, power driven corrugating rolls 12 109~88 3 2828 and 14 which are juxtaposed in parallel but vertically staggered relationship to one another and mated together in conventional fashion at the nip. The upper web receiving roll 12 is driven in the counter clockwise direction, as indicated in FIGURE 1, whereas the lower web discharging roll 14 is driven in the clock-wise direction. The lower roll is also equipped with a vacuum means 16, including a vacuum generator 17, for temporarily retaining the corrugated layer web 2 on the exterior surface 13 of the roll after the web has exited from the nip 10 with its ~~
corrugated body configuration. The vacuum means 16 is also operative to maintain the corrugated layer web 2 in close registry with the contour of the surface 18, and the web 2 is maintained in this condition while the ridges 20 of the same are spotted with adhesive and the webs 2 and 4 are laminated with one another at the ridges. The adhesive is applied to the ridges of the web 2 by a hollow, cylindrical, power driven adhesive appli- -cator roll 22 which is mounted in parallel juxtaposition to the roll 14 and contacted with the ridges 20 while the web 2 is sub-ject to the vacuum in the roll 14. The webs 2 and 4 are laminated thereafter by a pressure roll 24 which is in receipt of the facing layer web 4 and rotatably mounted in parallel juxta-position with the roll 14 so as to feed the facing layer web in the direction of travel of the corrugated layer web, and to bond the facing layer web to the ridges of the corrugated layer web as the latter exits from its path of travel around the roll 14.
Afterward, the laminar composite 6 is reversed in direction and if desired, fed into a second lamination stage (not shown) where a second facing layer web is bonded to the composite in a some-what similar manner but on the opposite side of the web 2, as explained in the earlier Application.
3 2~8 ~OYH~U~ P 12 The adhesive applicator roll 22 is mounted so as to be co-extensive with the lower corrugating roll 14 in the axial direction thereof, and is driven in the counter clockwise direc-tion as indicated. The outside surface 26 of the roll is plain and smooth, and according to the invention, while the applicator roll is rotated, the hot melt adhesive is repeatedly successively deposited on the roll in spaced parallel lines 28 crosswise of the ridges 20 of the corrugated surface defining web 2, the lines and ridges are contacted with one another so that portions of the lines are deposited on the ridges in the aforementioned series of spots, and the balance of the lines is removed from the roll to a neutral zone 32 separate from the webs. See FIGURE 2. The adhe-sive is deposited on the applicator roll by a satellite system 34 which discharges the adhesive in streams 36 of the same that are adapted to impinge on the surface 26 of the roll along spaced parallel lines extending about the roll crosswise of the ridges of the web. The streams are formed by extruding the adhesive from a series of orifices 38 that are spaced apart from one another opposite the roll at a location spaced rotationally ahead of the location at which the lines 28 of adhesive on the roll are contacted with the ridges 20 of the web. The adhesive is removed from the applicator roll by doctoring it off with a rectilinearly edged blade 40 which is slidably engaged with the roll at a loca-tion spaced rotationally after the foregoing location at which the lines 28 of adhesive on the applicator roll are contacted with the ridges 20 of the web. Thus, the adhesive is deposited on the roll in the foregoing lines 28, the lines and ridges 20 are contacted with one another, and the balance of the lines is removed from the roll in continuous sequence at angularly spaced intervals about the axis of rotation of the roll 22.
lOYHD~U~ 3 288 More specifically, in the illustrated arrangement, the adhesive is heated to a fluid condition and pumped at 42 into an apertured manifold 44 under a pressure at which it extrudes from the apertures 38 of the manifold in the direction of the applica-tor roll. Also, the removed adhesive is collected in a sump 46 when it is doctored off of the applicator roll, and the pump 42 is connected with the sump to recirculate the collected adhesive to the manifold. The collected adhesive is also reheated between the sump and the pump to renew the fluid condition of the adhe-sive; and the manifold is heated to sustain the fluid conditionof the adhesive therein. The connection between the pump and the manifold is seen at 47; the connection between the sump and the pump is seen at 48; and the means for reheating the adhesive are associated with the pump unit at 42 as indicated. The means for heating the manifold ta~e the form of a pair of heater tubes 50 which are contiguous to and co-extensive with the manifold on opposite sides thereof in a plane perpendicular to the discharge path of the streams 36.
As indicated earlier, the pump 42 is normally a vari-able speed pump, and there are means 52 interconnected betweenthe pump and the applicator roll to vary the speed of the pump in response to variation in the speed of the applicator roll, so as to maintain the rate at which the adhesive is supplied to the manifold commensurate with the speed of the applicator roll.
Normally, the pump and reheater unit 42 also includes means for filtering the adhesive as indicated.
Claims (17)
1. In the process of laminating two or more layers of sheet material, one of which is corrugated and the other planar, the steps of:
a) passing the corrugated layer about a carrier roll which has a pressure differential across it to retain the layer, b) rotating the carrier roll holding the corrugated layer, c) depositing adhesive by flowing it from a manifold with spaced apart orifices onto the applicator roll in parallel lines oriented transversely to the ridges of the corrugated layer, d) contacting the lines of adhesive and the ridges of the corrugated layer so that portions of the lines are deposited on the ridges as a series of spaced pressure deformable spots of adhesive along the tops of the ridges, e) removing substantially all of the balance of the ad-hesive from the applicator roll to a collection zone from which it is recirculated to the manifold, f) contacting the planar layer with the series of ad-hesive spots on the ridges of the corrugated layer, and g) pressing the two layers together to spread the spots into the spaces between them and bond the layers.
a) passing the corrugated layer about a carrier roll which has a pressure differential across it to retain the layer, b) rotating the carrier roll holding the corrugated layer, c) depositing adhesive by flowing it from a manifold with spaced apart orifices onto the applicator roll in parallel lines oriented transversely to the ridges of the corrugated layer, d) contacting the lines of adhesive and the ridges of the corrugated layer so that portions of the lines are deposited on the ridges as a series of spaced pressure deformable spots of adhesive along the tops of the ridges, e) removing substantially all of the balance of the ad-hesive from the applicator roll to a collection zone from which it is recirculated to the manifold, f) contacting the planar layer with the series of ad-hesive spots on the ridges of the corrugated layer, and g) pressing the two layers together to spread the spots into the spaces between them and bond the layers.
2. The process according to claim 1 wherein the ad-hesive is deposited on the applicator roll in the aforesaid lines, the lines and ridges are contacted with one another, and the ba-lance of the lines is doctored off of the applicator roll in con-tinuous sequence at angularly spaced intervals about the axis of rotation of the roll.
3. The process according to claim 1 wherein the ad-hesive is removed from the applicator roll by doctoring it off with a rectilinearly edged blade at a location spaced rotationally after the foregoing location at which the lines of adhesive are contacted with the ridges of the corrugated surface defining layer.
4. The process according to claim 1 wherein the ad-hesive is of the hot melt type and is heated to a fluid condi-tion and forced by a pump into an apertured manifold under a pressure at which it extrudes from the apertures of the manifold in the direction of the applicator roll.
5. The process according to claim 4 wherein the re-moved adhesive is collected in a sump when it is doctored off of the applicator roll, and the pump is connected with the sump to recirculate the collected adhesive to the manifold.
6. The process according to claim 5 wherein the col-lected adhesive is also reheated between the sump and the pump to renew the fluid condition of the adhesive.
7. The process according to claim 6 wherein the mani-fold is heated to sustain the fluid condition of the adhesive therein.
8. The process according to claim 4 wherein the pump is a variable speed pump and the rate at which the adhesive is discharged from the manifold is controlled by varying the speed of the pump.
9. The process according to claim 8 wherein the rate of adhesive discharge is controlled so as to be commensurate with the speed of rotation of the applicator roll.
10. In an apparatus for laminating two layers of sheet material having corrugated and planar surfaces thereon, respec-tively, wherein the corrugated surface defining layer is passed about a carrier roll and while the corrugated surface defining layer is retained on said roll, series of spaced, pressure de-formable spots of adhesive are formed along the ridges of the corrugated surface thereof, the planar surface of the other layer is contacted with the series of spots and the two layers are pressed together so as to bond the layers together at the surfaces thereof, the improvement wherein the apparatus com-prises an adhesive applicator roll having a plain surface on the periphery thereof, a manifold operatively spaced adjacent to the surface, means for rotating the applicator roll in the path of the adhesive so that the streams impinge on the surface to form a set of spaced parallel lines of adhesive which extend about the periphery of the roll, means for rotating the appli-cator roll and the carrier roll in juxtaposition to one another so that the lines of adhesive contact the ridges of the corru-gated surface defining layer crosswise thereof and portions of the lines deposit on the ridges to form the spots, and means for thereafter removing the balance of the adhesive in said lines from the surface of the applicator roll at a point in the rota-tion of the roll between the point at which the set of lines contacts the ridges of the corrugated surface defining layer and the point at which the streams of adhesive form a new set of lines on the surface of the roll, so that the dimensions and physical characteristics of the lines of adhesive can be con-trolled at the manifold.
11. The apparatus according to claim 10 wherein the adhesive depositing means, the adhesive spot forming means, and the adhesive removal means are operable during the rotation of the applicator roll to deposit the adhesive on the applicator roll in the foregoing lines, contact the lines and ridges with one another, and remove the balance of the lines from the appli-cator roll in continuous sequence at angularly spaced intervals about the axis of rotation of the roll.
12. The apparatus according to claim 10 wherein the adhesive discharge means include means which define a series of orifices in the manifold that are spaced apart from one another opposite the surface of the applicator roll.
13. The apparatus according to claim 12 wherein the adhesive removal means include a rectilinearly edged blade which is slidably engagable with the applicator roll to doctor off the balance of the lines of adhesive at a location spaced ro-tationally after the foregoing location at which the lines of adhesive are contacted with the ridges of the corrugated surface defining layer.
14. The apparatus according to claim 12 wherein the adhesive discharge means include an apertured manifold and means including a pump connected with the manifold for heating the ad-hesive to a fluid condition and pumping the adhesive into the manifold under a pressure at which it extrudes from the apertures of the manifold in the direction of the applicator roll.
15. The apparatus according to claim 14 wherein there are means defining a sump for collecting the adhesive when it is doctored off of the applicator roll, and a connection between the sump and the pump by which the collected adhesive can be re-circulated to the manifold.
16. The apparatus according to claim 15 wherein there are also means for reheating the adhesive between the sump and the pump to renew the fluid condition of the adhesive, and means for heating the manifold to sustain the fluid condition of the adhesive therein.
17. The apparatus according to claim 14 wherein the pump is a variable speed pump and there are means operable to vary the speed of the pump in response to variation in the speed of the applicator roll so as to maintain the rate at which the adhesive is supplied to the manifold commensurate with the speed of the applicator roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA302,684A CA1090688A (en) | 1978-05-05 | 1978-05-05 | Method and apparatus for laminating planar and corrugated surface defining layers of sheet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA302,684A CA1090688A (en) | 1978-05-05 | 1978-05-05 | Method and apparatus for laminating planar and corrugated surface defining layers of sheet material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1090688A true CA1090688A (en) | 1980-12-02 |
Family
ID=4111398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA302,684A Expired CA1090688A (en) | 1978-05-05 | 1978-05-05 | Method and apparatus for laminating planar and corrugated surface defining layers of sheet material |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1090688A (en) |
-
1978
- 1978-05-05 CA CA302,684A patent/CA1090688A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3972763A (en) | Method of laminating planar and corrugated surface defining layers of sheet material | |
| FI88188B (en) | PROCEDURE FOR THE FRAMEWORK OF FRAMSTAELLNING AV EN KORRUGERAD SKIVKONSTRUKTION | |
| KR100394265B1 (en) | Process and apparatus for making foreshortened cellulosic structure | |
| CA1128485A (en) | Helically wound core and method of producing same | |
| CA2240072A1 (en) | Method for making three-dimensional, macroscopically-expanded webs having improved functional surfaces | |
| SU1454236A3 (en) | Method of producing upper material | |
| BRPI0607716B1 (en) | METHOD AND DEVICE FOR JOINING PAPER LAYERS | |
| US3425888A (en) | Method and apparatus for producing faced corrugated materials | |
| US5716687A (en) | Fusible bonding sheet and methods of fabrication thereof | |
| US4882005A (en) | Device for making laminated arch corrugated structures | |
| JPH0514611B2 (en) | ||
| CA1090688A (en) | Method and apparatus for laminating planar and corrugated surface defining layers of sheet material | |
| GB2156232A (en) | Reinforced pleated filtering material | |
| US4245975A (en) | Medium retaining device in single faced corrugated cardboard manufacturing machine | |
| EP0855464A3 (en) | Apparatus and process for applying directly or indirectly a liquid or pasty medium onto a moving web | |
| EP0109924B1 (en) | Process and apparatus for producing a composite web | |
| CA1072873A (en) | Corrugating process | |
| US5306384A (en) | Machine for making corrugated board including a vacuum/positive pressure transfer roll | |
| US5925209A (en) | Process and device for producing corrugated board | |
| WO1990004513A1 (en) | Improvements in corrugating machines | |
| EP0424529A4 (en) | Method and apparatus for producing nonwoven fabric | |
| GB2035203A (en) | Method of and apparatus for producing thick contact-adhesive layers | |
| US1173575A (en) | Apparatus for treating webs. | |
| US2766807A (en) | Apparatus and method for making a strip product capable of being wound up and provided with onefaced layer of cured thermosetting resin and product | |
| EP0279850B1 (en) | Corrugated board coating method and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19971202 |