Abstract: The present invention relates to a flexographic method of printing and a flexographic printing apparatus whereby the repeat length is greater than the circumference of the printing roller. This may be achieved by controlling the rotation of the printing roller as a non-printing zone of the printing roller passes a moving web such that an associated non-printed region formed on the web has a length that is greater than the non-printing zone. The rotation of the printing roller may be controlled by suspending the rotation of the printing roller or reducing the speed of rotation when the non-printing zone is in registration with the web and then increasing the speed of rotation to a predetermined printing speed as a printing zone of the printing roller comes into registration with the web.

Abstract: Method of printing and printing apparatus whereby the repeat length is greater than the circumference of the rotary printing screen (5). This may be achieved by controlling the rotation of the screen as a non-printing zone (2) of the screen passes a moving web (w) such that an associated non-printed region formed on the screen has a length that is greater than the non-printing zone. This, in turn, may be achieved by suspending the rotation of the screen or reducing the speed of rotation when the non-printing zone is in registration with the web and then increasing the speed of rotation to a predetermined printing speed as a printing zone (1) of the screen comes into registration with the web.

Abstract: A method of forming a carton including a sleeve member is disclosed. The method includes the steps of locating a sleeve member blank in registration with a carton body blank in a pre-determined position, and attaching an inner surface of the sleeve member blank to an external surface of the carton body blank prior to forming and/or erecting the attached carton and sleeve blanks into a required erect carton shape.

Abstract: Method of printing and printing apparatus whereby the repeat length is greater than the circumference of the rotary printing screen (5). This may be achieved by controlling the rotation of the screen as a non-printing zone (2) of the screen passes a moving web (w) such that an associated non-printed region formed on the screen has a length that is greater than the non-printing zone. This, in turn, may be achieved by suspending the rotation of the screen or reducing the speed of rotation when the non-printing zone is in registration with the web and then increasing the speed of rotation to a predetermined printing speed as a printing zone (1) of the screen comes into registration with the web.

Abstract: The present invention relates to a flexographic method of printing and a flexographic printing apparatus whereby the repeat length is greater than the circumference of the printing roller. This may be achieved by controlling the rotation of the printing roller as a non-printing zone of the printing roller passes a moving web such that an associated non-printed region formed on the web has a length that is greater than the non-printing zone. The rotation of the printing roller may be controlled by suspending the rotation of the printing roller or reducing the speed of rotation when the non-printing zone is in registration with the web and then increasing the speed of rotation to a predetermined printing speed as a printing zone of the printing roller comes into registration with the web.

Abstract: An apparatus for assembling a heat exchanger core matrix has a tube feed means for feeding heat exchanger tubes to a support surface upon which the heat exchanger is assembled and fin feed means for feeding heat exchanger fins to the same support surface. Both the tube feed means and the fin feed means are located above the support surface and, in use, the apparatus is operable to sequentially and vertically feed the tubes and fins to the support surface via a common feed guide. This arrangement enables the manufacture of large format heat exchanger cores.

Abstract: A flat, heat exchanger tube formed by rolling metal strip to fold inwardly the lateral edge regions of the strip to provide a tube having parallel, spaced, generally planar upper and lower walls, one of said lateral edge regions being bent to define a longitudinally extending partition wall extending within the tube towards said lower wall, said partition wall including first and second longitudinally extending regions disposed at an angle to one another so as to provide in one face of the partition wall a longitudinally extending recess receiving the free edge portion of the other of said lateral edge regions of the strip.

Abstract: A flat, heat exchanger tube formed by rolling metal strip to fold inwardly the lateral edge regions of the strip to provide a tube having parallel, spaced, generally planar upper and lower walls, one of said lateral edge regions being bent to define a longitudinally extending partition wall extending within the tube towards said lower wall, said partition wall including first and second longitudinally extending regions disposed at an angle to one another so as to provide in one face of the partition wall a longitudinally extending recess receiving the free edge portion of the other of said lateral edge regions of the strip.