摘要:
The invention relates to a method for laminating and cutting a laminate (8) comprising a sheet having the shape of a web (1) and separate sheets (2). Said laminate (8) is fed towards a cutting station (9) and a computer controls cutting process as a function of the feed rate and a signal from the rear edge (28) detector. The cutting function of the blade is also controlled by computer as a function of the feed rate. The present invention also provides enhanced cutting precision and enables the combined use of a rear edge detector (28) and a front edge detector (17).
摘要:
A process and apparatus for controllably registering two continuously moving layers of material is provided. A continuously moving first layer has a plurality of components, and a continuously moving second layer has a plurality of reference marks representing a respective plurality of components. The process and apparatus control the distance between reference marks of the second layer to a selected distance, and then controllably registers each reference mark of the second layer to a respective component of the continuously moving first layer.
摘要:
Extrusion coating of a removable thermoplastic material (22) onto freshly painted (non-fully cured paint) surfaces has been found to be an effective method for providing protection against damage during handling, and blocking during stacking, enabling handling of the substrate (10) shortly after painting. Furthermore, the extrusion coating allows the paint (16) to dry and cure on porous and non-porous substrates.
摘要:
A method and apparatus for laminating media sheets to remove trailing edge coating debris as the carrier (32) is removed from the laminated sheet (38) involves imparting a transverse force to the laminated sheet to cause the sheet to abruptly straighten as the trailing edge of the sheet passes by a corner of a carrier separation bar (80) at which the carrier is removed. The transverse force may be imparted by guides such as rollers (90, 92) defining a serpentine path through which the laminated sheet must travel.
摘要:
Described is an adhesive for bonding together, under the action of heat, the surfaces of two layers of material, in particular by bonding points on the surfaces. The adhesive comprises pieces of thermoplastic sheet (1, 2, 3, 4) which are applied to the contact surface of at least one of the layers (5, 7).
摘要:
A process and apparatus for controllably registering two continuously moving layers of material is provided. A continuously moving first layer has a plurality of components, and a continuously moving second layer has a plurality of reference marks representing a respective plurality of components. The process and apparatus control the distance between reference marks of the second layer to a selected distance, and then controllably registers each reference mark of the second layer to a respective component of the continuously moving first layer.
摘要:
To enhance compressed products and the like, the invention proposes that lamination be not effected in the prior art manner by actual calender rollers but by means of a controllable pair of laminating rollers. Here, the sheet is applied in a floating manner with relatively little roller pressure. The sheet can be conveyed to the laminating rollers without tension by means of a controllable application mechanism. The processing rate and the sheet length, for example, can be fed in by computer, and thus the sequence of the application power and also that of a wet cutting device can be controlled via a suitable incremental value generator from the main control unit. It is immediately possible to set processing rates of 60 to 100 metres per minute. Even at the highest rates, the quality is still good.
摘要:
Trennvorrichtung für Bogenkaschiermaschinen zum Separieren der bei der schuppenförmigen Bogenförderung mit einer durchgehenden Filmschicht (9) überzogenen Bogen (11) unter Auftrennung der Filmschicht im Überlappungsbereich, wobei eine gegenüber einer Gegegendruckwalze justierbar verstellbare rotierende Aufreißwalze mit rauher Oberfläche, deren von der Spitze (5) der Vorsprünge aus gemessener Abstand von der Gegendruckwalze größer als die Bogendicke, aber kleiner oder gleich der doppelten Bogendicke ist.
摘要:
A laminating film (10) for applying as a coating to a web of overlapped or underlapped sheets (12) has a line of cuts or perforations (16,14) near one or both of its edges to provide a tear initiation zone when the web of coated sheets arrives at a desheeter (S) where the end sheet is separated from the web by mechanical means not involving knives or shears.