Abstract: A method for the production of a plastics pipe (9) comprising an inner core and an outer removable skin bonded thereto, which method comprises co-extruding molten polymeric materials forming the inner core and the outer removable skin layer from one or more extruder dies, bringing the polymeric materials together and allowing them to solidify, and conditioning the solidified polymeric materials at a temperature and for a time sufficient to influence the adhesion of the outer skin layer to the inner core, such that on cooling the adhesion of the outer skin layer to the inner core is sufficient to prevent substantial undesired relative movement between the skin layer and the core during installation of the pipe (9), but insufficient to prevent the outer skin layer from being clearly removed by peeling, at least at the ends of the pipe (9), and insufficient to cause a substantial reduction in the impact strength of the inner core.

Abstract: A method for the production of a plastics pipe (9) comprising an inner core and an outer removable skin bonded thereto, which method comprises co-extruding molten polymeric materials forming the inner core and the outer removable skin layer from one or more extruder dies, bringing the polymeric materials together and allowing them to solidify, and conditioning the solidified polymeric materials at a temperature and for a time sufficient to influence the adhesion of the outer skin layer to the inner core, such that on cooling the adhesion of the outer skin layer to the inner core is sufficient to prevent substantial undesired relative movement between the skin layer and the core during installation of the pipe (9), but insufficient to prevent the outer skin layer from being clearly removed by peeling, at least at the ends of the pipe (9), and insufficient to cause a substantial reduction in the impact strength of the inner core.

Abstract: ? An information transmission system which comprises a system base station including; a transmitter arranged for communication with a plurality of mobile receiver units, via a mobile radio system; a CPU in which data is registered appertaining to a plurality of different subjects; an alert signal generator; and an SMS (Short Message Service) message generator, the alert signal generator being responsive to data stored in the CPU for initiating the generation of an appropriate SMS message by the SMS message generator for transmission via the transmitter and the mobile radio system to a mobile receiver units or units, consequent upon registration in the CPU of data appertaining to a predetermined subject. The system is especially suitable for use in airport passenger flight departure information applications, wherein the mobile receiver units are carried by passengers and used to update them with flight data using the SMS.

Abstract: A leveling machine for slit steel which removes bends and bumps in the steel prior to recoiling. The leveler includes top and bottom sets of rollers of varying sizes to accommodate varying gauges of steel. The top of rollers is attached to a frame which pivots relative to the bottom frame to ensure proper roller orientation.

Abstract: An inflatable toy is described, in the nature of a free-standing punching bag, which includes front and rear panels joined to each other to form a substantially sealed enclosure capable of retaining gas under pressure. An internal or intermediate panel is provided inside of the enclosure and is spaced substantially equally from the front and rear panels. The front and intermediate panels are formed of a transparent material while the rear panel is opaque. Images are imprinted on the internal surfaces of the three panels, the images cooperating with each other to produce an illusion of three dimensions and composite image which continuously changes with different angles of observation of the inflatable article.