摘要:
Closure flap folding apparatus includes a transfer cylinder with rows of vacuum ports extending longitudinally along the periphery, a delivery cylinder having a plurality of rows of peripheral vacuum ports extending longitudinally thereon in spaced relation to each other and an intermediate seal fold cylinder also having vacuum ports extending longitudinally thereon. The transfer cylinder and delivery cylinder have the same diameter and are arranged to rotate in the same direction at substantially the same peripheral speed. The seal fold cylinder is positioned between the transfer cylinder and delivery cylinder and is arranged to engage a portion of the envelope transferred thereto by the transfer cylinder and retain engagement of the portion of the envelope while folding of the seal or closure flap takes place. The delivery cylinder engages the body portion of the envelope and transfers the envelope to a collecting device. The seal fold cylinder rotates at the same peripheral speed as the transfer cylinder in a direction opposite thereto and at an exact multiple of the angular velocity of the transfer cylinder, as for example, the seal fold cylinder completes four revolutions to a single revolution of the transfer cylinder. A timing device and valves are provided to exert a suction through the vacuum ports on the seal fold cylinder only when the vacuum ports are in overlying relation with the preselected portion of the envelope blank. The closure flaps may be folded forwardly in overlying relation with the opening in the envelope, rearwardly into overlying relation with the front surface of the envelope, or the envelope may be transferred through the folding device with the closure flap in an open unfolded position.
摘要:
Envelope blank timing and aligning apparatus includes a support table for the envelope blanks with a pair of spaced parallel endless chains. The chains are positioned slightly below the upper surface of the table with pin members extending upwardly therefrom. The pin members engage edge portions of the envelope blank and convey the envelope blank along the table in timed and aligned relation for feeding into the other envelope-forming elements of the machine. A drive for the chains includes a drive shaft connected to a drive gear. A drive sprocket for one of the chains is secured to the drive shaft for rotation therewith. A tubular drive shaft is coaxially positioned on the drive shaft and has a drive sprocket for the other chain secured thereto for rotation therewith. A transmission drive is provided to connect the tubular shaft to the drive shaft and to adjust the phase angle of the tubular shaft relative to the drive shaft and thereby adjust or change the position of the pins on the respective chains relative to each other. The transmission drive includes an idler shaft and meshing spur gears connecting the drive shaft and the idler shaft. Also included in the transmission is a pair of meshing helical gears connecting the idler shaft and the tubular shaft. Axial movement of the idler shaft relative to the drive shaft and tubular shaft moves the gears on the idler shaft relative to the gears on the drive and tubular shaft to rotate one shaft relative to the other and change the phase angle between the drive shaft and the tubular shaft. The adjustment of the phase angle between the respective shafts may be accomplished while the shafts are rotating to thereby adjust the relative position of the aligner pins while the envelope machine is running.
摘要:
Envelope blanks arranged in overlapped relation with the seal flap portions exposed are conveyed past a seal flap gummer mechanism where a roll applicator continuously applies a liquid gum adhesive to the seal flap portions of the envelope blanks. The overlapped envelope blanks are slightly separated to space the portions of the seal flaps having the wet adhesive thereon to prevent the blanks from adhering to each other. The overlapped and slightly separated envelope blanks are then conveyed by two pairs of endless chains through the drier section of the envelope machine to dry the wet seal flap adhesive. Each pair of endless chains has an upper chain with a conveying section positioned in juxtaposition with the upper conveying section of the lower chain. The pairs of chains are positioned in spaced parallel relation and the respective conveying sections frictionally engage the side flap portions of the envelope blanks therebetween and convey the overlapped blanks through the drier section. The chains have laminated block links connected to adjacent lines by pairs of link plates. Both the link and link plates have a generally planar or flat surface and an upper arcuate surface with raised end portions and a recessed intermediate portion. The chains formed from the link blocks and link plates thus have a generally flat surface and a curved surface with outwardly extending spaced, raised portion. The conveying section the the upper chains have the curved surface with the spaced, raised portions engaging the overlapped envelope blanks and the conveying sections of the lower chains have the flat surface engaging the envelope blanks. The lower chains are coated with a silicone rubber to increase the friction between the envelope blanks and the conveying section of the chains without marking the envelope blanks and preventing the envelope blanks from slipping during transport through the drier section.
摘要:
WINDOW PATH CUTTING APPARATUS INCLUDES A PAIR OF WEB PULL ROLLS AND VACUUM ROLL. THE VACUUM ROLLS HAS A SERIES OF SUCTION PORTS ALONG THE PERIPHERY AND A PATCH CUTTING KNIFE BLADE EXTENDING RADIALLY OUTWARDLY THEREFROM. THE PATCH CUTTING KNIFE BLADE ON THE VACUUM ROLL SEVERS WINDOW PATCHES FROM A WEB WHEN IT MOVES INTO CUTTING RELATION WITH A FIXED PATCH CUTTING KNIFE BLADE POSITIONED ADJACENT TO THE VACUUM ROLL AS THE VACUUM ROLL ROTATES RELATIVE TO THE FIXED KNIFE BLADE. THE WEB PULL ROLLS ARE DRIVINGLY CONNECTED TO EACH OTHER FOR ROTATION AT SUBSTANTIAL LY THE SAME PERIPHERY SPEED AND ARE SPRING LOADED TO FRICTIONALLY ENGAGE THE PATCH MATERIAL THEREBETWEEN. THE WEB PULL ROLLS ARE CONNECTED TO AND DRIVEN BY A VARIABLE SPEED DRIVE MECHANISM. THE VARIABLE SPEED DRIVE MECHANISM IS IN TURN DRIVINGLY CONNECTED TO A PORTION OF THE ENVELOPE MACHINE AND IS DRIVEN AT MACHINE SPEED IN FIXED RATIO WITH THE MAIN DRIVE SHAFT AND OTHER COMPONENTS OF THE ENVELOPE MACHINE. THE VARIABLE SPEED DRIVE MECHANISM CONTROLS THE PERIPHERAL SPEED OF THE WEB PULL ROLLS AND THUS, CONTROLS THE LENGTH OF THE WINDOW PATCH CUT BY THE PATCH CUTTER KNIFE, BLADES. AN INCREASE IN THE SPEED OF THE WEB PULL ROLLS INCREASES THE LENGTH OF THE PATCH CUT AND CONVERSELY, A DECREASE IN THE SPEED OF THE WEB PULL ROLLS REDUCES THE LENGTH OF THE WINDOW PATCH. THE SPEED OF THE WEB PULL ROLLS CAN BE INCREASED OR DECREASED WHILE THE ENVELOPE MACHINE IS RUNNING. THE VACUUM ROLL IS DRIVEN AT MACHINE SPEED AND THE UNSEVERED END OF THE WINDOW PATCH MATERIAL SLIDES ON THE SURFACE OF THE VACUUM ROLL UNTIL A PORTION IS CUT BY THE CUTTING KNIVES.
摘要:
An apparatus whereby the seal score and bottom score is made on the seal and bottom flaps respectively of envelopes or bag blanks. The apparatus provides for split scoring and an adjustment for different size envelopes or bag blanks. Size changes are accomplished by a running adjustment of the one scorer, relative to the other scorer which remains fixed. The construction is such that the pull-out segment engages each envelope blank at a precise location so that the distance on the envelope blank for the first scoring operation thereon is always predetermined. Thus, a fine running adjustment is permitted along with quick size changes for envelopes or bag blanks. The scoring knives also may be mounted on a common cylinder.
摘要:
Apparatus for applying gum or adhesive to the seal flap of an envelope includes a collator vacuum cylinder that feeds the envelope blanks at a predetermined speed relative to the drive shaft of the envelope machine to a collator roll. The collator roll is driven at a speed arranged to move the envelope blanks into overlapped relation as a band onto a gumming belt conveyor. The gumming belt conveyor and the gumming roll drive mechanism are driven at a speed to maintain the envelope blanks in the band in preselected overlapped relation while adhesive is applied to the exposed flap portion of the envelope blanks by the gumming apparatus. The collator roll, gumming belt conveyor and the gumming roll drive mechanisms are driven in timed relation to each other and are drivingly connected to each other. The collator vacuum cylinder is driven at a fixed ratio relative to the main drive shaft. The input shaft of a variable speed drive mechanism is drivingly connected to the collator vacuum cylinder and the variable speed drive mechanism output shaft is drivingly connected to the apparatus for driving the collator rolls, gumming belt conveyor and the gumming roll drive mechanism. With this arrangement the speed of the collator roll, gumming belt and gumming roll drive mechanism may be changed relative to the speed of the collator vacuum cylinder and thus vary the overlapped relationship of the envelope blanks and the width of the strip of seal gum applied to the seal flap portion of the envelope blank.
摘要:
AN APPARATUS WHEREBY WINDOW ENVELOPES ARE PROVIDED WITH TWO OR MORE WINDOWS HAVING A PATCH CUTTING AND APPLICATION SYSTEM IN WHICH THE MECHANISM PREPARES AND FEEDS INDEPENDENTLY TIMED WINDOW PATCHES TO THE APPROPRIATE LOCATION ON EACH OF THE WINDOW ENVELOPES. THE MECHANISM UTILIZES SUITABLE INDEPENDENT CUTTING CYLINDER TOGETHER WITH A PATCH TRANSFER CYLINDER AND ONE OF THE CUTTING CYLINDERS TRANSFERS THE CUT PATCHES TO A COLLATING CYLINDER.
摘要:
Envelope blanks with a wet adhesive applied to the seal flap portion are conveyed through a drier by an endless chain conveyor. The conveyor is driven at the same speed as the other machine components to serially convey the blanks as they are supplied to the conveyor from the seal gum applicator and collator section of the machine. A wound rotor motor is provided to drive the machine components and the drier conveyor. The rotor voltage of the wound rotor motor varies inversely with the speed of the motor, the maximum voltage being generated when the motor speed is at a minimum. A drier circuit is provided that includes a separate source of current with the drier resistors and silicon controlled rectifier in series. The source of current for the the drier circuit is also connected to the output coils of a magnetic amplifier in a heater control circuit. The magnetic amplifier is connected to a pulse transformer and the output coils of the pulse transformer provide a signal to control the gates of the silicon controlled rectifiers. With this arrangement the magnetic amplifier controls the firing angle of the SCRs and the current flowing through the heater resistors. The heater control circuit is arranged so that the magnetic amplifier without a substantial feed-back voltage from the rotor is full on and supplies heat to the drier at the maximum intensity. This condition is approached when the machine is running at maximum design speed where a minimum voltage feed-back is generated. As the speed of the machine and of the wound rotor motor is reduced, the rotor voltage increases and a feed-back of this rotor voltage through the input coil of the magnetic amplifier serves as a negative control on the magnetic amplifier to reduce the current flow through the output coils and in turn reduce the current flow through the SCRs to the heater resistors. As the speed of the motor and the machine is reduced further, the rotor feed-back voltage increases and thereby increases the voltage in the magnetic amplifier input coil to apply an increased negative control and further reduce the current flow through the SCRs to the heater elements. The rotor voltage supplied t the heater control circuit as a feed-back from the wound rotor motor, increases or decreases the heat intensity of the drier. As the motor speed increases, the rotor voltage decreases and the drier heat intensity increases. Conversely, when the motor speed decreases, the rotor voltage increases and as a negative control, decreases the drier heat intensity proportionately.
摘要:
Drive for an envelope machine is provided by a pair of wound rotor motors. The motors are mounted adjacent opposite ends of an envelope machine and are drivingly connected to different components of the envelope machine. The motors are electrically connected to each other to drive all of the envelope machine components in proper timed relation to each other to form envelopes from envelope blanks. The wound rotor motors have their stators connected in parallel and their rotors electrically connected to each other. A rotor circuit is provided and includes resistors and silicon controlled rectifiers. The silicon controlled rectifiers provide speed control for the motors by controlling the current flow through the resistors. A speed control circuit provides for stepless, smooth increase or decrease in the speed of the motors and of the envelope machine components driven thereby. The motors, because of the electrical connection of the rotors to each other, maintain the rotors in substantial alignment with little or no angular displacement between the rotors while the motors are running and driving the envelope machine components. A separate synchronization circuit is provided to rotate one of the rotors while the rotors are not connected to each other to position the rotors in substantial alignment. After the rotors are substantially aligned by the synchronization circuit, control relays are energized to close relay contacts and electrically connect the rotors to each other so that the rotors of the motors are first aligned with substantially no angular displacement therebetween. The speed of both motors may be changed by increasing or decreasing the amount of current flow through the resistors in the rotor circuit. Silicon controlled rectifiers in the rotor circuit control the amount of current flowing through the rotor circuit and the firing angle of the silicon controlled rectifiers is controlled by a separate speed control circuit. Safety circuits are provided to require the speed control circuit to be energized before the rotor circuit is closed. The resistors in the rotor circuit are positioned in the drier for the seal flap adhesive and provide a portion of the heat for the drier.
摘要:
In an envelope making machine a band of overlapped blanks is conveyed from an adhesive drier to a blank separator by a refeeder. The refeeder has pairs of inner and outer endless belts that are driven at the same speed with the outer belts overlying portions of the inner belts. The belts engage the band of overlapped blanks therebetween and convey the band from the drier to the separator. is positioned beneath an idler roll carriage that has an end release roll adjacent the separator. The separator includes pull-out rollers with a radially extending pull-out segment on one roller that engages the front or leading edge of the blank and accelerates the front blank to separate it from the band of overlapped blanks and feed it in timed relation to the subsequent elements of the envelope forming apparatus. When the length of the blank changes or when the dimension of the conveyors in the drier and refeeder increase with increased operating temperatures of the machine, an adjustment is required in the phasing or timing of the blanks delivered to the separator so that the pull-out segment continues to engage the front leading edge of the blank. The disclosed refeeder adjusts the timing of the blanks by changing the effective length of the refeeder conveyor and thus the distance that the band of overlapped blanks travels from the drier to the separator. The length of the refeeder conveyor is changed by moving two reference frames or drums relative to each other. Movement of one reference drum changes the effective length of the path followed by the blanks and movement of the other reference drum changes the effective length of the inner belts. The outer belts have spring loaded take-up idlers that proportionately adjust the effective length of the outer belts to conform to that of the inner belts. An endless chain drive mechanism for the inner and outer belts is connected to the pair of reference drums so that the effective length of the chain is adjusted with the reference drums. The pitch diameter of the belt drive pulleys and belt drive sprockets is substantially the same so that the chain velocity remains constant and the phase relation of the chain drive changes with the endless belts.