Abstract: A method and an apparatus for manufacturing corrugated boards are disclosed. The method may include the steps of supplying a first web of medium having a first and second sides, wherein each side of the first web having a plurality of flutes, and wherein each flute having a crest, applying a wetting agent and an adhesive composition in a sequential fashion to the plurality of flutes on the first side of the first web, and securing a second web of medium to the plurality of crests on the first side of the first web to form a single-faced corrugated board.

Abstract: A method and an apparatus for manufacturing corrugated boards are disclosed. The method may include the steps of supplying a first web of medium having a first and second sides, wherein each side of the first web having a plurality of flutes, and wherein each flute having a crest, applying a wetting agent and an adhesive composition in a sequential fashion to the plurality of flutes on the first side of the first web, and securing a second web of medium is to the plurality of crests on the first side of the first web to form a single-faced corrugated board.

Abstract: A method and an apparatus for manufacturing corrugated boards are disclosed. The method may include the steps of supplying a first web of medium having a first and second sides, wherein each side of the first web having a plurality of flutes, and wherein each flute having a crest, applying a wetting agent and an adhesive composition in a sequential fashion to the plurality of flutes on the first side of the first web, and securing a second web of medium is to the plurality of crests on the first side of the first web to form a single-faced corrugated board.

Abstract: A corrugating machine for producing single-faced or double-faced corrugated board which utilizes a thermal sensing system to determine the length of the web in the bridge instead of an ink-based sensing system. The corrugating machine includes means for supplying a first paper web, means for corrugating a second paper web to produce a corrugated paper web, and means for adhering the first paper web to the corrugated paper web to form a single-faced corrugated web. The corrugating machine has a splicer for splicing one of the paper webs at a splice point, means for applying a liquid spot, such as water, to one of the paper webs, and means for thermally detecting the liquid spot after the liquid spot is applied, such as a temperature detector. The corrugating machine determines the length of the single-faced corrugated web based upon when the liquid spot is applied by the applying means and when the liquid spot is thermally detected by the detecting means.

Abstract: A valve for applying a flowable material in which it is desired to provide a sharp cutoff in application of the material includes a valve body with a chamber therein in communication with a source of the material to be applied. A movable piston is positioned within the valve body and there is a passage in the piston opening to the chamber with the passage terminating in an application opening. A movable valve stem is positioned to open and close upon the passage chamber opening to control the flow of material to the passage and application opening. A negative pressure is created at the application opening at or immediately after closure of the valve stem upon the passage chamber opening to thereby provide a sharp cutoff in the application of the material from the opening.

Abstract: A control for regulating the application of glue to a defined area of a moving paper board box blank includes a sensor for detecting the presence of the leading and trailing edges of a moving defined glue application area; a glue applicator spaced a fixed distance from the sensor; a pulse generator providing pulses indicative of movement of the application area; and counting means which are connected to the sensor, glue applicator and pulse generator. The sensor initiates a counting action at detection of the leading edge of a glue application area. The counting means initiates glue application after a predetermined number of counted pulses representative of the fixed distance between the sensor and glue applicator. The sensor initiates a second counting action at detection of the trailing edge of a glue application area and the counting means stops glue application after the same predetermined number of pulses representative of the sensor glue applicator fixed distance.

Abstract: A means for detecting the application of glue to a defined area of a moving box blank includes a capacitance device, one plate of which is formed by a sensing surface positioned adjacent the path of box blank movement, with the other plate being formed by the defined area of the box blank and the applied glue. There are means for applying an electric signal to the sensing surface and means for sensing variations in said signal caused by the presence or absence of glue. There is a control circuit for enabling the detector, which control circuit enables the detector after a glue application and after a period of delay consistent with movement of the box blank from the glue applicator to the detector.

Abstract: A means for sensing the amount of a liquid bonding agent applied to secure a corrugated medium to a liner includes a capacitance device, one plate of which is formed by a sensing surface positioned adjacent the corrugated medium, liner and the applied liquid bonding agent. The other plate of the capacitance device is formed by the moving corrugated medium, liner and the applied bonding agent. There are means for applying an electric signal to the sensing surface and means for sensing variations in that signal caused by the amount of the liquid bonding agent applied to the corrugated medium and liner. The sensed variations in the applied electric signal are used to control the application of the bonding agent to the corrugated medium. The capacitance device may include a plurality of individual sensing areas having a width and spacing related to the width and spacing of the tips of the corrugated medium.

Abstract: A system for use in detecting jams in a series of members of defined length which are moving along a predetermined path includes a pulse generator for providing sequential pulses, each representative of a unit of length. A counter having a preset number therein representative of the defined length of a member plus an additional fixed length substantially less than that of a member receives an input from the pulse generator and from a sensor positioned adjacent the path of movement. During the period that a member is sensed, the preset count in the counter is reduced by the pulse generating means and if that count is reduced to zero, a jam condition is indicated and means are provided to stop movement of the members.

Abstract: A system for detecting a jam condition in a series of sequentially moving members which are passing a plurality of stations. The system finds particular application in the production of corrugated board or the like in which at the first station there may be a slitting or slotting or printing drum which is performing an operation on a series of moving corrugated board members. There are detection means at each station and successive signals from one station indicating the presence of a member at that station without a resetting signal from the next sequential station will provide a signal indicative of a jam condition. There are means to prevent a false indication of a jam which can be caused by the absence of a member at the first station in the system.

Abstract: A means for providing a variable fluid pressure responsive to changes in a measured variable includes a fluid pressure reservoir and electrically controlled fluid supply and exhaust valves connected thereto. A pressure-to-voltage transducer is connected at the output of the reservoir and in turn is connected to a comparison means along with means for providing an electrical signal representative of a measured variable. The comparison means provides a difference signal, which difference signal is utilized to control the supply and exhaust valves.

Abstract: A system for controlling, in a corrugating operation, the amount of single face material in a storage area ahead of the double face operation, includes means for sensing the difference between single face and double face drive speeds, and for providing a signal proportional to that difference; means for sensing the amount of single face material entering and leaving the storage area and means for providing a signal proportional to the difference therebetween; means for sensing the speed of material moving adjacent the storage area input and means for sensing the speed of material moving adjacent the storage area output and means for comparing said speeds and for applying the comparison to said material comparison signal; and control means for the single face drive utilizing the speed and material proportional signals as the inputs therefor.

Abstract: A system for detecting a jam condition in a series of sequentially moving members which are passing a plurality of stations. The system finds particular application in the production of corrugated board or the like in which at the first station there may be slitting or slotting or printing drums or the like, which are performing an operation on a series of moving corrugated board members. There are detection means at each station and two successive signals from one station, indicating the presence of a member at that station without a similar signal from the next sequential station, will cause a jam signal to be provided by the circuit.