Abstract: A fastener tape for use in the manufacture of reclosable plastic bags is provided. The fastener tape comprises an intermediate layer and a reclosable fastener profile thereon. The intermediate layer includes three layers of co-extruded plastic, with not more than 4% EVA as the outer two layers and HDPE as the middle layer. The intermediate layer is folded so as to bring portions of the intermediate layer into an opposing relationship. These opposing portions are then sealed together by a pair of seal bars. By carefully controlling the sealing temperature, a consistent peel seal is created between the opposing portions of the intermediate layer without the need for an adhesive.

Abstract: A process for forming irrigation drip tape includes, broadly, the steps of a) supplying a longitudinally continuous strip of flexible plastic material in a first direction; b) heating a narrow band of the strip along a longitudinal axis thereof; c) depositing a continuous bead of material on an upper surface of the strip, along the narrow band, while the strip moves in the one direction; d) cooling the strip and the bead; e) folding the strip longitudinally so that the longitudinal edges overlap; and f) sealing said longitudinal edges to form a tubular drip tape with a longitudinal, overlapped seam, with the bead extending parallel to the seam and in opposed, facing relationship thereto.

Abstract: A method of manufacturing plates, such as chipboards, fibre boards and the like boards, where the raw material in form of biomass particles, such as wood chips, wood fibres and the like applied with a thermosetting binder is spread onto a preforming band into an endless mat, and where this mat (B) is pre-compressed in a continuously operating prepress (C ) and then completely pressed in a continuously operating hot press, whereby the mat (B) is compressed into the desired thickness of the finished plate and the thermosetting binder is hardened. According to the invention, the mat (B) is pretreated by means of steam immediately before the introduction into the hot press (E) by means of a device (F) so as to obtain predetermined gradients of moisture content and temperature across the thickness of the mat. As a result the capacity of the apparatus can be increased at the same time as the energy consumption can be reduced.

Abstract: A laminator assembly utilizing either an endless multi-ply belt (27) or a half-lap belt and another endless belt and a roller arrangement (43) to apply pressure to media (55) to be laminated and to convey the media (55) in a controlled manner to pressure rollers.

Abstract: A laminator assembly and lamination method which comprise: a first roller located on a first side of a media passage; a second roller located on a second side of said media passage so as to oppose said first roller, wherein a nip portion is defined between said first and second rollers so as to apply pressure to media in said media passage which passes through said nip portion; and wherein at least one of said first and second rollers is a roller comprising a substantially solid layer (42), a deformable layer (48) surrounding said substantially solid layer, and a perforated layer (46) surrounding said deformable layer forming an outer surface of said at least one of said first and second rollers.

Abstract: The present invention is a conveyor apparatus for conveying a multilayer material to be processed, used in a laminator having an upper chamber and a lower chamber partitioned by a diaphragm with or without a heating device disposed in the lower chamber, wherein a conveying belt is disposed under the multilayer material to pass through only two side edges of all four side edges of each chamber opposed to each other along a conveying direction of the multilayer material. Accordingly, the multilayer material can be conveyed in a reasonable manner without injuring a laminating function by the conveyor apparatus in the laminator.

Abstract: A laminating device includes two pressure rollers pressed toward each other and together defining a pinch and a first feed mechanism for guiding to the pinch a strip of a flexible first substrate provided with a thermally-activated glue layer. The first feed mechanism includes a first heater for heating the first substrate with the glue layer. The laminating device also includes a second feed mechanism for guiding a flexible second substrate to the pinch such that this second substrate and the glue layer are pressed against each other by the pressure rollers. The laminating device also includes a second heater placed in the zone of the pinch upstream thereof for heating the first substrate with the glue layer heated by the first heater and the second substrate immediately prior to the joining together thereof in the pinch, such that a laminate is formed including two substrates mutually connected by the glue layer.

Abstract: A laminating heating module for use in a flatbed laminating machine. The heating module comprises an elongate body portion with at least one heating pad attached thereto. The heating pad is fabricated from silicone rubber and includes three separate heating zones for regulating the heat to the body portion. Attached to each heating zone of the heating pad is a respective thermocouple to control the temperature of each heating zone. The heating module further comprises a thermostat attached to the heating pad and operative to protect the temperature of the body portion of the heating module from overheating.

Abstract: A method to obtaining a product formed by a discontinuous/interrupted material and backing, using a continuous gluing/heating machine. A base material is provided with a thermo adhesive resin or an elastomer. A discontinuous/interrupted material is placed over the base material and pressed or joined to form a product comprising the base material and the discontinuous/interrupted material. The combined produce undergoes a predetermined temperature and a predetermined pressure.

Abstract: The invention relates to a device for the continuous production of plate-shaped products, comprising two endless strips which are positioned one above the other and can be driven. A working gap is formed between the sides of said endless strips, said sides being adjacent to one another and each being conveyed via a support surface. The starting material for processing is conveyed through said working gap which is bordered on each side by an accompanying strip. Said accompanying strip is situated along said working gap between the two endless strips and moves with them, consisting of a flexible sealing strip which has a friction surface on at least one face, said face facing towards an endless strip. Said friction surface increases the static friction between the flexible sealing strip and the endless strip.

Abstract: Flexible surface structures (21, 22, 27) are often glued to one another with the application of pressure and heat. Known laminating devices for this purpose are limited in their efficiency. If greater laminating efficiency is to be achieved, an existing laminating device has to be exchanged for a more powerful laminating device. The invention proposes a laminating device constructed in modular fashion and having a plurality of successive laminating stations (12, 14). In this way, the laminating efficiency can be increased by adding new laminating stations (12, 14) to already existing laminating stations (12, 14) which thus do not need to be replaced. In addition, it is proposed that a drying station (17) be provided between successive laminating stations (12, 14), in which drying station the surface structures (21, 22) laminated in the first laminating station (12) are dried before they are joined with a further surface structure (27) in the succeeding second laminating station (14).

Abstract: The invention relates to a process for the production of boards of wood-based material from a mixture of lignocellulose- and/or cellulose-containing particles mixed with a binder, the mat or pressed stock being preheated by means of high-frequency (HF) or microwave (MW) energy and, after transfer into a single or multi-platen press or a continuously operating press, being pressed and cured by the application of pressure and heat. To increase the preheating temperature of the pressed stock and to reduce the pressing factor, the following process steps are provided: (a) the preheating in the core of the mat of pressed stock to ≧85° Celsius takes place after or during the precompaction by traveling wave microwave energy and its reflection in an interaction between emitted and reflected energy into the center of the mat of pressed stock, a.

Abstract: A lamination machine for adhesively heat laminating adjacent surfaces of two lengths of material to each other. The machine includes a flatbed pre-laminating station with upper and lower pre-lamination conveyor belts and banks of heater components immediately above and below. At least one pre-lamination belt is vertically movable to establish and adjust a gap between belts while its associated bank of heating elements is vertically pressuredly movable to thereby tightly maintain proximity of heater elements, belts, and laminate materials. Situated immediately downstream is a pressure roller independently vertically movable to establish and adjust laminate gap distance and, during lamination operation, tensioned against a lower conveyor belt guide roller and movable by a roller pressure driver toward the guide roller.

Abstract: A lamination machine for adhesively heat laminating adjacent surfaces of two or more layers of material to each other. The machine includes upper and lower opposing conveyor belts disposed one above the other to form a lamination passage therebetween and through which layers of material travel during lamination. At least one pressure roller is tensioned against the layers to be laminated. A heating module is disposed between the entrance and pressure roller, while a cooling module is disposed between the pressure roller and an exit. The heating module provides a plurality of rigidly maintained single-structure extruded heater components for melting an adhesion constituent disposed between the layers of material in preparation for lamination.

Abstract: A method and an apparatus for manufacturing thermoset webs of thermoplastic polymer material which is comminuted into particles, such as flakes, granulated material or the like or is ground into powder. The thermoplastic polymer material particles are distributed uniformly on the lower conveyor belt; the distance between the lower and upper conveyor belt is maintained equal to the thickness of the web to be manufactured; the initial layer poured onto the surface area of the lower conveyor belt is applied with such a thickness of the layer that the thermoplastic polymer material particles are subjected during the entire transport between the upper and lower conveyor belts in the heating and cooling sections only to a minimum pressure of at most 0.

Abstract: A laminator assembly and method utilizes an endless belt (17a, 17b, 300) and roller arrangement to apply pressure to media (100) to be laminated and to convey the media in a controlled manner to heated pressure rollers (11a, 11b, 301, 307). In one feature of the invention, control nips can be provided on one or both sides of the heated pressure rollers so as to minimize or eliminate flutes or ripples in the media to be laminated. The control nips can be applied by plate assemblies (29, 30, 315) which create the control nip and also serve to gain control of the media to be laminated prior to the media reaching the heated pressure roller arrangement. In the case where the plate assembly is downstream of the heated pressure roller arrangement, the plates can serve to hold the media flat while it cools down. The endless belts apply a tapering and controlled pressure to the media prior to the media reaching the heated pressure rollers where lamination occurs.

Abstract: A heating device (1) for a corrugated cardboard installation includes several heating plates (3), arranged successively in the direction of advance of a corrugated cardboard web (2). Heating device (1) also includes at least one pressure unit (5), consisting of a bearing (6) arranged diagonally or transverse with respect to the direction of advance of the corrugated cardboard web (2). At least one pressure element (7) is attached to the bearing (6). The pressure element (7) is connected with the bearing (6) in a freely movable manner via at least one elastic medium (11). The elastic medium transfers the weight of the bearing (6) to the pressure element (7).

Abstract: A frame, a drive mechanism for rotating a mandrel, at least two spindles mounted to the frame, a tensioner, and a belt extending between the first and second spindles may be used to roll pre-preg strips or similar sheets of composite materials around the mandrel. The belt over the spindles, and the spindles guide the belt through changes in its direction of travel. The mandrel is mounted in the drive mechanism in contact with the belt, which changes its direction of travel around the mandrel. The lower surface of the belt bears against portions of the spindles, and the mandrel contacts the upper surface of the belt. As the drive mechanism rotates the mandrel, pre-preg sheets are fed between the mandrel and the belt and are thereby wrapped around the mandrel. The belt presses the pre-preg sheets against the mandrel. The wrapped mandrel may then be removed from the apparatus and cured in any suitable manner known in the art to produce a composite tubular article.