37results about How to "Minimize air leakage" patented technology

One embodiment of the present invention is an improved sheet glass forming apparatus. In another embodiment, a precise thermal control system redistributes the flow of molten glass at the weirs to counteract the degradation of the sheet forming apparatus which inevitably occurs during manufacturing. In yet another embodiment, the invention introduces a counteracting force to the stresses on the trough in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming trough. Another embodiment creates a variable external cross-section which provides hydraulic stresses that are in opposition to the surface tension and body force stresses and thus, reduces the influence of surface tension and body forces. In an alternative embodiment, the glass is preferentially cooled across its width to create forming stresses during solidification, which ensures that the glass sheet drawn is inherently flat. In an additional embodiment, the internal pressure is adjusted in each of the major components of the forming apparatus such that the pressure difference across any leakage path to the forming zone is essentially zero. Therefore, air leakage in the apparatus is minimized even though the cracks and openings exist during initial operation and develop during manufacturing.

Mechanism for producing vacuum pressure and air flow for drawing recording paper of various widths to the platen surface of a printer enables such pressure and air flow to be held in a suitable range without adjusting the suction. A first suction area of specified width is disposed width-wise in the middle of the platen surface that opposes the inkjet head of the printer, and second suction areas are disposed on the left and right sides of the first suction area, the front edge of which is offset from the front edge of the second suction areas. The first suction area is divided to form first chambers, each having a first suction hole that communicates with a vacuum channel. The second suction areas are segmented to form second chambers, some, but not all, of which are formed with second suction holes that are spaced from the first suction holes.

Apparatus and process for dispensing fluids, such as chemical concrete admixtures, using an air-operated pump and load cell for supporting and measuring at least substantially 100% of the weight of the pump and fluid dispensed through the pump. A double-action, dual piston design of the air-operated pump allows positive air pressure to be used during both fluid-filling and fluid-expelling phases.

A medium suction support device includes a medium support table, a suction unit, a plurality of flexible tube members and a sliding member. Through-holes are formed in the medium support table to pass through the medium support table. The suction unit is disposed on a side of the back surface to suction the recording medium disposed on the medium support surface via the through-holes. One opening end of each of the flexible tube members surrounds a corresponding one of the through-holes on the back surface. The sliding member is configured to move in parallel along the back surface. The sliding member has openings formed in an opposing surface facing the back surface with each of the openings being configured to respectively accommodate the other opening end of a corresponding one of the flexible tube members. The openings have different lengths in a parallel movement direction of the sliding member.

A disk drive slit shroud mitigates a discontinuity in the bypass channel with an additional wall feature formed on the slit shroud. When installed, the wall feature fills the gap in the wall of the bypass channel that would otherwise be required to accommodate a slit shroud of sufficient surface area. The discontinuity in the channel wall is needed for manufacturing clearance during the installation of the slit shroud. The slit shroud design includes the wall feature which, when installed, fills up the gap in the channel wall to maintain a relatively flush conduit for the bypass channel.