Abstract: A speed control system is provided for apparatus and process for shaping and treating web material of indefinite length wherein the apparatus includes a master processing unit, one or more slave processing units communicating with the master unit through web storage or buffer means and a computer. Information as to the desired speed and mode of operation of the master unit and the mode of operation of the slave units is inputted to the computer which communicates with the drive motors of the master and slave units through special buffered isolated amplifiers and automatically controls the speed of the slave units so as to maintain the desired quantity of partially processed web material in the web storage means and to maintain the selected operating speed of the master unit.

Abstract: A dryer-cooling machine for combining a single face corrugated paper web whose flute peaks are wetted by lines of water-based adhesive with a liner web. The machine serves to cure the adhesive and thereby bond the webs together to form doubleface corrugated board. The singleface web and the liner web which overlies the flute peaks are transported by a conveyor belt through a heating zone and a cooling zone. In the heating zone, the belt carrying the webs passes through a funnel. Air is blown through the funnel to create in the converging region above the webs a static pressure which forces the liner into intimate contact with the flute peaks. Above this region are infrared heater elements. The wall of the funnel between the heater elements and the converging region is permeable to infrared rays whereby these rays penetrate the region and are absorbed by the liner to heat the wet adhesive, the resultant water vapors being carried away by the air flowing through the funnel.

Abstract: Effective control of warp in the manufacture of corrugated paperboard sheets on standard corrugator equipment is achieved by the on-line application of a regulated quantity of moisture to one or both sides of the completed corrugated paperboard web after it has been heat-bonded together, while it is still hot from the heat-bonding operation, and prior to its being cut into individual corrugated paperboard sheets. By proper selection of the quantity and placement of the moisture application treatment, it is possible to counterbalance the net effect of the warp-producing conditions developed within the bonded paperboard web prior to and during its bonding operation, so that the resulting paperboard sheets leaving the corrugator will be consistently substantially flat. The moisture application treatment is carried out with an adjustable moisture spray system designed to selectively apply to either or both sides of the bonded paperboard web a variable regulated quantity of moisture.

Abstract: An improved corrugated carboard sheet and a method for producing corrugated cardboard sheets of the type which utilize paper at least for either of the core sheet or the liner sheets, including feeding and shaping the core sheet into the desired corrugated configuration by using corrugating rolls, applying as the adhesive a film of a molten thermoplastic polymer to a face of the corrugated sheet, and pressing a liner sheet against the face of the core sheet covered with adhesive.

Abstract: Pharmaceutical dosage forms comprising an edible web having deposited thereon or at least partially thereon a particulate medicament, the webs being thereafter fabricated and finished to pharmaceutically elegant solid dosage forms having no medicament exposed on an exterior surface. The dosage forms have a consistency of release of medicament which can be controlled to exacting specifications. The disclosed solid dosage forms are prepared by high speed automated equipment and the process by which they are made is characterized by non-destructive quality control analysis and performance evaluation both conducted on-line and integrated into the manufacturing operation. Inclued in the scope of the disclosed invention are certain apparatus and methods of manufacture.

Abstract: A polymer plastic coated paper double-facer corrugating machine equipped with web preheating cylinders having position adjustable wrap control arms is described having a variable response relationship between the machine production speed and a corresponding wrap control arm setting. The double facing nip of the machine is provided with a series coupled pneumatic loading spring and worm jack to set the nip clearance. For transitional support of double faced product between the load variable nip roll and the lower tractor belt of the double-faced board pulling section, an air table is provided.

Abstract: An open-loop method and apparatus for controlling the heating of webs utilized in a corrugating machine for the production of double-face corrugated paperboard as a function of at least one production factor of the corrugator machine. A rotatably journaled heating roll receives a web in contact with a circumferential area of the roll and the circumferential area of contact between the web and the roll is varied by a control circuit. The control circuit varies the contact area by positioning a positionable means relative to the heating roll in response to at least one production factor of the corrugating machine. The control circuit senses the at least one production factor of the machine and generates a signal related to the sensed production factor. The generated production factor related signal is periodically sampled and is stored at a first time.

Abstract: Rigid-when-wet, but foldable, corrugated paperboard and process of making same by applying phenolic resin to contiguous surfaces of the outer liner, the medium, and the inner liner without substantially altering the hygroscopicity of the exposed faces of the liners, and adhering the three components together before the resin is cured.

Abstract: Apparatus for applying pressure in a controlled manner to a moving web of material for the purpose of transferring heat to the web passing over heating means, for curing the adhesive thus bonding together the component sheets making up the web, includes a plurality of pressure rolls resting directly or indirectly on the web, manual and automatic adjustments for varying the effective weight of the rolls to vary said applied pressure in accord with variations in the speed of the web, such being adjustable for varying the rate of said adjustment, and an arrangement for preselecting a condition such that at zero web speed, the effective weight has an initial positive or negative value.

Abstract: Apparatus for supplying heat and pressure to a corrugated paper board comprising heated means for supporting a web of the board as it is drawn thereover, an endless belt whose lower flight is adapted to overlie the web while it is drawn over said heated means and a plurality of freely rotatable transversely extending parallel longitudinally spaced rolls engaging the upper surface of the lower flight of said belt, at least some of said rolls being journaled in bearings located in pivoted levers, there being resilient spring means for applying a variable force to said levers, whereby an adjustment of the effective weight of at least some of the rolls on said belt may be made.

Abstract: Corrugated board is formed by heating the plastic coated bonding surface of a liner web to a plasticizing temperature against the Teflon coated surface of a rotating heating drum and, while plasticized, fused against the flute crests of a corrugated medium web. The fusion bonded joints are set in the nip of a chilled pressure roll for stripping of the board unit from the corrugating roll surface. Speed of the single-face unit is primarily controlled as a function of the magnitude of angular wrap of the liner web about the heating drum. Temperature of the bonding surface of the liner web is sensed upon removal from the heating drum for the purpose of speed trim adjustment.

Abstract: A method and apparatus for improving overall quality and reducing warp in corrugated paperboard blanks by controlling a number of interrelated production factors in the production of a double-face corrugated paperboard web from which the blanks are made including the selection of product variables, production of the web, observation of warp characteristics, and adjustment of production factors affecting warp characteristics. Apparatus for controlling warp characteristics includes water sprays at various points along the production apparatus, tensioning devices for various lamina of the composite web, wrap devices for controlling heat supplied to the lamina, adhesive-gap control devices affecting moisture content of the lamina, pressure and flotation devices for controlling heat exposure time of the web, and feedback devices for automatically maintaining selected relationships between the production factors as a function of production speed.

Abstract: The separate machines of a corrugator are coupled so that they can be operated in synchronization. The separate machines are controlled as a unit by use of tachometer feedback signals which eliminate motor speed drift and permit operation at relatively high speed during an order change.

Abstract: Method and apparatus are disclosed for monitoring the quantity of single face paperboard on the bridge of a corrugator so that a unit length of paperboard will remain on the bridge for a preselected time irrespective of the speed of the corrugator to properly season the paperboard. Signals indicative of input and output of paperboard to the bridge are compared with a signal indicative of a preselected time and a signal is generated to effect changes in the single facer machine motor speed.

Abstract: Method and apparatus are disclosed for making a laminated board of thermoplastic resin. The laminated board is formed of a pocketed core sheet having inverted and non-inverted pockets disposed between a pair of face sheets which are bonded to the extremities of the pockets. The core sheet is advanced directly from the extrusion die to a roll-forming means which deforms the core sheet to form the pockets in a continuous manner. The face sheets are advanced from the respective extrusion dies on opposite sides of the core sheet and are joined therewith at controlled temperatures so as to form a bond by fusion with the extremities of the pockets. The roll-forming means comprises a drum with multiple convex and concave forming elements with means for vacuum drawing the core sheet against the forming elements and means for forced air removal of the core sheet from the roll-forming means.