Abstract: A scanning head ink jet printer prints at high-speed to produce large format output of graphics quality. The printer utilizes variable paper advance interlacing, which allows high speed, full coverage printing with a variety of saber angles. Several series of variable paper advances can be used to optimally correct potential banding problems in the image. The printer utilizes multiple print heads mounted on a single carriage. The multiple print head system allows for higher ink delivery rates than possible on prior art printers. Bi-directional printing allows even faster output, and several adjustments can be made to address the order of ink laydown. The printer utilizes a new calibration pattern wherein different frequencies of marks are printed by different colored ink jets. The marks can be easily analyzed to determine proper calibration setting between jets. The carriage rides on a single rail having upper and lower v-shaped roller tread surfaces.

Abstract: Image data processing using a transformation thereof to device independent, intermediate color space color coordinates while avoiding gamut matching determinations during and in subsequently completing transformation of coordinates to being suited to an output device, and storing such coordinates in an intermediate frame buffer.

Abstract: A round duct and apparatus and method of forming the duct in which the side edges of the duct are formed to interlock when the duct is folded and the flap is secured in place to provide support when the finishing duct tape is applied to seal the flap and complete the joint.

Abstract: A duct closure machine for closing duct board into duct with tape which can close duct having four or more sides. Duct board is moved through the machine by a single source of power driving upper and lower rollers with the lower set of rollers movable to accomodate duct of different size. The tape applicator is shiftable laterally to apply tape to duct of different number of sides such as ten sides. The tape applicator is controlled with a simple power circuit in which power to cut off the tape is only applied for a brief time as the completed duct passes through the machine.

Abstract: Apparatus and method of forming shiplap grooves (21, 23, 25, 26 and 28) in a duct board (12) utilizing a square (35) and measuring indicia (39). The apparatus comprises shiplap groove cutting tools (22) and (24) and an angle square (35) comprising a guide leg (37) and a base leg (36) having indicia (39) indicative of the desired dimensions for a resulting shiplap duct. The shiplap groove cutting tools have sleds (57, 67, 58 and 56) which are placed against the guide leg (37) to be guided by the same to produce shiplap grooves (23, 25 and 26). The length of the spacing between the grooves is equal to the indicated indicia (39) for the narrow sleds (57 and 68) or the indicated indicia plus the thickness of the board for the wide sleds.

Abstract: An electrical dissipator comprising a multiplicity of fine electrically conductive wires having their proximate ends fitted into a hole in an electrically conductive base member and secured therein by crimping to securely grip the ends of the wires. One embodiment of the base member comprises a hollow tube allowing connection over an existing traditional lightning rod. In another embodiment, the base member comprises a solid rod or hollow tube having its proximal end threaded to allow the traditional lightning rod to be unthreaded from its threaded base and replaced. In a third embodiment, the base member comprises an apertured flange for bolting to the structure to be protected from lightning.

Abstract: A skylight structure offering superior water intrusion resistance has a glass plate superposed in spaced relationship above a plastic dome member having an integral inverted U-shaped flange. A cap marginally framing the glass and plastic members has spaced downwardly depending flanges with an inner shorter flange abutting the outer surfaces of the plastic flange and an outer longer flange spaced from and shielding the outer surfaces of the plastic flange. The outside lower end of the U-shaped flange is cured outwardly.

Abstract: A structural panel, such as a window or door sash which is mounted for horizontal sliding movement between a pair of tracks forming its frame and which is pivotable about a vertical axis extending through a pair of apertures in the tracks. The sash is supported for movement along the tracks by respective carriers located adjacent each corner of the sash. The sash includes releasable locking means located within one stile and a pair of pivot assemblies located in the other stile. Each pivot assembly includes a rod which is extendable vertically through an aligned carrier and into the aperture in the associated track. The carrier into which the rods extend includes a rotatable mount to enable the sash to be pivoted out of the frame when the releasable locking means is released.

Abstract: A machine for fastening the flap of a duct board previously cut in a manner to permit it to be folded into duct form; such machine being capable of stapling the flap to the side edge of the board if desired and of applying a sealing tape to the flap and adjacent other edge of the duct board to complete the forming and sealing of a piece of duct board into a duct.

Abstract: A rotary blade cutting assembly wherein a fixed cutting blade and a rotary cutting blade are rotated into radial alignment to thereby effect a cutting operation is provided for performing sequential cutting operations on continuously moving material. The rotary blade is rotated out of alignment with the fixed blade to thereby allow the material to be cut to be positioned with respect to a cutting edge defined by the fixed blade to thereby provide for intermittent cutting of the material by the rotary blade mechanism.

Abstract: A machine for cutting fiberglass board of the type having an impermeable barrier, such as foil, on one face thereof. As a board of fiberglass moves through the machine, the leading edge of the foil is bent down from it normal plane of travel so that a knife edge which is below this plane of travel will be inserted between the foil and remainder of the board.The board is then maintained in its normal plane of travel and the knife edge being below the board forces the barrier to shear away from the board as the board passes through the machine. The knife edge cleans the loosened foil to remove most of the insulation material that might remain adhered thereto.