A method and apparatus for high speed pouch or bag making from thin, heat-sensitive thermoplastic film webs or multiply webs of paper, film and foil in which the seal pattern may be simple or complex sealing and in which the method is applied to a continuously moving web and sealing is achieved at temperatures below the softening temperatures of the film or the sealing interfaces. A method of forming an open pouch comprising the steps of continuously driving an elongated web of pouch forming material at a constant speed along a pouch making path which extends continuously through a web coating station, a web collating station, an E.B. curing station and a web cutting station. A pattern of a coating is applied to a first surface of a first continuous web of pouch forming material as it is driven continuously through the web coating station to render the interface bondable at a seal line and non-bondable in the area of the storage compartment when subjected to electron beam radiation. A second web is directed into a face-to-face relationship with the first web in the collating station and the collated webs are driven through the E.B. curing station and irradiated with E.B. radiation to bond the bondable areas of the web at the interface while leaving the non-bondable areas free from securement and the pouches are cut from the webs by severing along transverse cut lines.

A method 10 for forming a relatively stiff and/or a substantially tight joint 10, 30, 46 while concomitantly reducing the likelihood that the applied adhesive 12 will seep from the joint 10, 30, 46. In the preferred embodiment of the invention, the adhesive 12 is placed upon about one half of the coverage portion and upon about ten percent of the fillet portion of each coach and one-half coach joint 10, 30. The adhesive 12 is further placed upon at least fifty percent of the coverage portion 48 of a lap joint 46.

Adhesives adapted especially for bonding optical elements and consisting of, as major components, a polyfunctional acrylate and a polythiol, a radical generating photoinitiator, a radical generating heatactivated-curing initiator and a stabilizer against premature onset of curing.

Conventional thermosetting resins are thinned with radiation sensitive or actinic light sensitive materials and then subjected to a dual cure wherein the material is first subjected to ionizing irradiation or actinic light and then to the conventional curing mechanism of the thermosetting resin. The resultant film contains the properties of both the radiation sensitive material and the conventional thermosetting resin and is easily applied as a coating.

A panel assembling method is disclosed which comprises the steps of coating a thermosetting adhesive on the connection area of a first panel to be fixed to the connection area of a second panel, mating the connection areas of the first and second panels, heating a portion of the connection area of the first or second panel to set the adhesive on the portion, by passing a current, possibly a high-frequency current, through the portion between electrodes which are contacted to it, thereby temporarily assembling the first and second panels, and subsequently heating all of the connection area of the first or second panel to set the adhesive entirely on the connection area. An apparatus for partially setting the thermosetting adhesive is also disclosed.