Uses high frequency energy to seal dielectric materials , i.e. vinyl. Typically high frequency sealing uses a bar of varying lengths and widths (1/4″ to 2″). The dimension of the sealing bar creates the sealing pattern — straight or curved. This process creates very nice looking seals, although high frequency sealing is relatively slow, expensive and only works with a limited range of materials, and does not work well with dissimilar materials.
Uses noise energy to seal thermo-plastic materials. Noise frequencies vary from approximately 15KHz (loud noise – larger sealing area) to 40 KHz (relatively quiet –small sealing area). Typical seam widths range from 1/4″ to 1″. Ultrasonic sealing can either be accomplished with a bar sealer or a rotary sealer. Not all materials can be ultrasonically sealed, although the material range is much greater than high frequency sealing.
Uses a heated platen located between the layers to be welded. The heated platen or wedge moves between the layers with very little friction and therefore wedge welding is, perhaps, the fastest method for welding long lengths of material. Wedge welding can be used to produce straight and curved sealing patterns. Works very well with almost all thermo-plastic materials from plastics to synthetic textiles. Works better with thicker or heavier materials (over 20 mil per layer). Wedge welding used predominantly to weld vinyl or pvc coated textiles, high density materials (20-80 mil HDPE), synthetic textiles including polypropylene, polyester and nylon. For more information on wedge welding and wedge welding suppliers to the industry, go to: http://www.wedgewelding.com/.
Uses a heated nichrome wire under pressure to seal a wide range of materials. Takes the form of a bar sealer and is used predominantly to produce straight sealing patterns. Works best with thin materials ranging from under 5 to 10 mil to produce a seam width ranging from 1/8″ to 1/2″ on materials such as supported or unsupported vinyl, polyethylene, and many flexible materials.
Very similar to Impulse Sealing, however pulses the heated nichrome wire. The pulsing action emulates High Frequency and Ultrasonic heat sealing at significantly less cost. The method developed by Novaseal is commonly used to make outdoor signs, billboards, posters and drapery systems, among other industrial uses where reduced sealing time is important. Works best with lightweight materials including polyethylene, vinyls and other thermoplastic materials ranging from 5 to 30 mil in thickness. Seam width ranges from 1/4″ to 1″, where 1″ is the most popular.
Artist with Space Browsers
Space Browswers are simple airborne tele-robots. Helium-filled blimps of human proportions or smaller are propelled by lightweight motor-driven propellors with attached video camera, microphone and speaker allow for remote operation and interaction experiences.
More images are available here
Archigram was an avant-garde architectural group formed in the 1960s – based at the Architectural Association, London – that was futurist, anti-heroic and pro-consumerist, drawing inspiration from technology in order to create a new reality that was solely expressed through hypothetical projects. The main members of the group were Peter Cook, Warren Chalk, Ron Herron, Dennis Crompton, Michael Webb and David Greene.
Mike Webb, 1967
On the occasion of an exhibition was in the domed hall of the Kunsthalle in Hamburg installed . In the middle of a square pool of 6 m side length of white plastic tissue a steel tower stood at the top of a glass-cube, in which there were two barrels with natural greenery. On the front sides of the cube were two attached semi-circular, divided into chambers made of transparent foil cushion the lungs, which over alternately controlled blast from the green cube and breathes. Like the wing of a human lung, lifted and pushed by them and they lowered the air is filtered and flavored with artificial additives in a tube system, which led right through the building to a customer location on the square in front of the Kunsthalle.
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