Abstract: An air injection nozzle has an air injection face with a number of air injection holes arrayed at an interval (Py) in first and second staggered rows. The first row and the second rows are positioned at an interval (Px). The air injection face and the sheet running face confront each other at a distance (L). The air injection holes in the air injection face have a diameter (D). The interval (Px), the interval (Py), the distance (L) and the diameter (D) satisfy Formula (1): 6?(L/D)/(Px/Py)?9, and Formula (2): 4?L/D?8. This air injection nozzle is employed as a resin film heat treating apparatus in a tenter oven to be used for manufacturing the resin film.

Abstract: In a pin tenter, a wet film is conveyed and dried in a state that edges of the wet film are pierced by pins. The plurality of pins are fixed to a pin plate. The pin plate is supported by a pin carrier. The pin carrier is disposed between rails. Movement of the pin carrier is guided by the rails. Nitrogen gas is supplied through a nozzle to the inside of a rail cover in a gas purge area, and thus the inside of the rail cover is pressurized. Atmospheric gas containing solvent gas in the pin tenter is prevented from entering the inside of the rail cover. Accordingly, precipitation of additives and the like on the rails and the pin carrier is eliminated. A suction device sucks nitrogen gas together with foreign substances such as dust from the inside of the pressurized rail cover.

Abstract: A spin head includes a rotatable plate, first chucking pins and second chucking pins for supporting a edge portion of a substrate loaded on the plate, and a driving unit for selectively driving the first and second chucking pins. The driving unit includes a first magnet connected to the first chucking pin and disposed at a first height, a second magnet connected to the second chucking pin and disposed at a second height, and a driving magnet for driving the first and second magnets. The driving magnet is elevated by means of an elevating member to selectively apply a magnetic force to the first or second magnet and moves in the radius outside direction of the first or second chucking pin due to a magnetic force.

Abstract: An apparatus for drying semiconductor wafers includes a bath for receiving semiconductor wafers and for holding a fluid, a chamber for providing an area where vapor is flowable over the bath, a supply pipeline for supplying vapor to the chamber, a vapor discharging pipeline for expunging vapor in the chamber, a fluid discharging pipeline for draining fluid in the chamber therefrom, and a protector for maintaining a distance between the semiconductor wafers during a drying process.

Abstract: A drying section for drying and controlling shrinkage of a moist fiber web in a paper making machine is provided, the web having a predetermined width and opposed transverse ends. Such a drying section comprises a plurality of drying section members configured to receive and forward the web in a machine direction. Each drying section member has opposed ends in a transverse direction. The drying section members further comprise a first drying section member and a second drying section member, with the second drying section member being separated from the first drying section member so as to define an intermediate zone therebetween. The drying section further comprises a primary belt set having a belt member wrapping about each of the opposed ends of each of the drying section members. Each belt member is configured in an endless loop and has a width less than half of the width of the web.

Abstract: A method and flotation dryer unit effects drying of a web such as a coated paper web. The flotation dryer unit advantageously includes several nozzle boxes extending across the web for feeding drying air toward the web to be dried, a distribution chamber for drying air for leading the dry air into the nozzle boxes, and a suction chamber for gathering the drying air led toward the web from the web area and for directing it to the side of the web. The suction chamber is divided into an equalizing space and an air transport chamber by a perforated plate for equalizing the return air flow occurring from the web area.

Abstract: Flexible edge sealing membranes cooperate with the heating surface of a vacuum preheater and a web moving over the surface (1) to minimize air loss in the portions of the heating surface not covered by the web, (2) to prevent differential heating of the edges of the web induced by unrestricted air flow, and (3) to provide reduced friction contact with the edge portions of the web.

Abstract: Tenter driers are frequently used for drying textile webs whose edges have an increased weight per unit area or have been treated with glue. It is extremely difficult to dry the edges to the same degree of residual humidity as the remainder of the web. In the inlet region, the blower box has been replaced by blower pipes extending parallel to the chain rails. The pipes are connected to the recirculated air system of the drier and provided with nozzle apertures directed towards the web edges. Since only a low drying capacity is available, the drier either has to be extended or the throughput speed has to be decreased. With the drier according to the invention, a longitudinal section which starts at the inlet and extends over at least 20% of the total length is equipped with blower pipes (27, 28) aligned parallel to the chain rails (13, 14). Blower boxes (18, 19) are also mounted in this longitudinal section, both above and below the textile web (15).

Abstract: An apparatus for continuous drying and shrinking of textile knitted or woven good incorporates at least one drying station that includes several oppositely disposed and oppositely hot-air nozzles which are offset relative to each other and directed into a through-channel defined thereby. At least upper and lower endless rotating, porous guide belts limit the channel above and below.

Abstract: An essentially non-contact holddown system for a corrugator double backer utilizes vacuum pressure through the lower heating section which supports the double face corrugated web. Continuous edge sealing membranes overlie the edges of the web and form, with the web edge and the surface of the heating section, vacuum chambers into which air is drawn from the flute spaces in the double face web.

Abstract: An automated stencil dryer includes a holder mechanism for holding a stencil, a discharge mechanism for discharging air against a stencil positioned in the holder, and a driver mechanism operatively coupled to the discharge mechanism for automatically moving the discharge mechanism so that compressed air can be discharged fully across the surface of the stencil. In one embodiment, the discharge mechanism includes a pair of air knives disposed parallel to one another on opposite sides of the holder so that the stencil is between the air knives when the stencil is positioned in the holder. The air knives are oriented inward toward the stencil when the stencil is positioned in the holder so that air discharged from the air knives is directed against the stencil. In another embodiment, the discharge mechanism includes a pair of air distribution pipes disposed parallel to one another on opposite sides of the holder so that the stencil is between the distribution pipes when the stencil is positioned in the holder.

Abstract: The dryer section of a paper-making machine is fabricated as a number of subsections arranged end-to-end throughout the length, the subsections each including a pair of prefabricated large vertical side frames which provide support for the dryer cans, felt rolls, etc. The subsections can be individually fabricated and do not require precise levelling relative to each other resulting in great improvements in the speed and cost of installation of the dryer section.

Abstract: An apparatus for draining liquid drops from a tentering oven is described, which comprises a plurality of plenum ducts for heating and cooling a film and a tenter for stretching the film. The tentering oven has at least two partition walls between the heating and cooling zones of the oven and wherein each of the partition walls located above the tenter is fitted with a pan and a heater for heating the pan at the lower part thereof, with a blower being installed above the compartment defined by the partition walls.

Abstract: A tentering oven comprises a heating furnace and a tenter. The heating furnace has multiple plenum ducts juxtaposed above and below a film in a direction perpendicular to the flow of the film for blowing hot air to heat the film. The tenter stretches the film transversely and comprises clip bodies, clip levers and liners provided on linked chains, as well as rails composed of chain directing rail members that progressively depart away from each other and a chain drive member. An oil pan is provided beneath a joint of the rail members and each of the plenum ducts is provided in such a way that the hot air discharge port of the ducts is not positioned immediately below the oil pan so as to ensure that the hot air blown from the plenum duct does not make direct contact with the bottom of the oil pan.

Abstract: In the initial region of the dryer section at least one of the dryer groups (23) is developed as a single-felt dryer group in which a single endless felt (F) and the web (9) travel alternately over cylinders (73) and guide suction rolls (73'). In the final region of the dryer section there is present at least one double-felt dryer group (24) in which a web (9) travels alternately over lower (74) and upper (74') cylinders. The single-felt group (23) has an automatic ropeless tail guide device (76, 79) for the threading of the so-called tail. In the double-felt dryer group (24) an automatic ropeless tail guide device (77, 78) is also present.

Abstract: Arrangements are described which allow a printing stock web to be reliably drawn through a drier. A draw-in member which grasps the tip of a printing stock web has a power transmission, e.g. a roller chain, which runs in a guide. Plates or blowing boxes which are movable vertically to the draw-in plane of the printing stock web and form closures in the guide by lateral projections of their side walls are provided to prevent dirt from penetrating into this guide. Rollers or cylinders are provided for additional correction of a lateral displacement of the printing stock web while the web is drawn in by the draw-in member. A friction-locking engagement, i.e.

Abstract: An oven for curing coating material applied to metal sheets (15) has a heating section (17), a cooling section (18) and an incinerator (19) for burning fumes from the coating material. The oven also as a conveyor for carrying sheets through it. The oven is associated with a sheet feeder (11), a coating apparatus (12), and a sheet stacker (13). In one embodiment, a conveyor (16) comprises an air bed (30) and two series of drive members (35) mounted on two endless chains (36). Air is ejected through a matrix of slots in the air bed (30) and thereby creates a cushion for supporting the sheets (15). The air is ejected in a direction which urges the trailing edges of the sheets into engagement with the drive members (35) and the drive members (35) propel the sheets through the oven. In another embodiment, a conveyor (200) comprises two series of drive members (205, 206) mounted on spaced apart chain (208, 209) and arranged in pairs for engaging the trailing and leading edges of metal sheets.

Abstract: Telescoping slot nozzles for use with a rail assembly are disclosed. Each nozzle includes a fixed portion and at least one telescoping portion slidably guided in the fixed portion. Metal-to-metal contact in the nozzle is avoided, thereby allowing the nozzles to operate at high temperatures. The configuration of the nozzle discharge opening can be easily modified to form an air knife, depending upon the particular application. Each nozzle is independent of the others, thereby facilitating retrofitting existing ovens and maintenance of individual nozzles.

Abstract: A web threader assembly comprises at least one flexible stainless steel belt to which the leading edge of a web can be detachably affixed. The belt is conveyed through a web path extending through the dryer or other machine in which the web travels, is guided by a plurality of pulleys and tensioning devices, and is positively driven through the dryer or other web processing machine by its own drive system. The belt is extremely thin and thus permits tight sealing of the dryer or other machine requiring a threading operation and also requires no lubrication, and also can be easily cleaned and thus can be used in sterile environments. If the threader is to be used with a relatively wide web, two spaced apart belts are preferably provided and connected threader bar to which the web is attached. An electronic control system monitors operation of the threader assembly and terminates operation of the threader assembly upon breakage or jamming of the web or the belt.