Abstract: A packaging machine has a roll supporting device with a support shaft rotatably supporting a film roll which extends in an axial direction, an elongated bag-forming film being wrapped around the film roll, a bag forming device which pulls out the film from the film roll and forms the film into a shape of a bag, a packaging device for filling the bag-shaped film with articles to be packaged and sealing the film to produce a package, a roll displacing mechanism for displacing the roll supporting device in the axial direction, and a roll position controller for controlling the roll displacing mechanism to adjust the position of the roll supporting device. The bag forming device includes a former for bending the film into a tubular form and a former roller for guiding the film to the former.

Abstract: A poker is provided to a packaging machine which has a former for bending a film into a tubular form and a chute for guiding articles to be packaged into a bag being made below. The poker includes a driver link which is driven to undergo a reciprocating rotary motion around a fixed axis and a generally L-shaped arm member disposed above and behind the former. A base part of the arm member is rotatably connected with a moving end part of the driver link such that the arm member can undergo a reciprocating rotary motion around a mobile axis of rotation which rotates around the stationary axis of rotation. A connecting mechanism is further provided to coordinate these two rotational motions such that the tip of the arm member distal from its mobile axis of rotation will move along a desired trajectory to reach a desired bottom center part of the chute which is likely to become clogged with the articles dropped thereinto.

Abstract: A bag maker-packaging machine adapted for use with formers having different sizes uses pull-down belts to pull by suction an elongated film which has been tubularly formed by a former. When a new former is installed, the pull-down belts are moved from specified belt reference positions towards the surface of the film in a tubular form, and the distance travelled by them until they come into contact with the film surface is measured. After the size of the former is thus identified, positions of some of the components such as a guide roller and a turn bar for the transportation of film to the former are adjusted accordingly. Data corresponding to different former sizes may be stored in a memory and compared with the identified size of the former currently installed. The user can see on a display device what kinds of product can be packaged by using this identified former and may also be informed if the memory does not store any data for formers of the identified size.

Abstract: As a cylindrically formed web of thermoplastic bag-making material is transported longitudinally along a path at a specified speed, a longitudinal sealer with a heater is compressed against and over portions of the material parallel to the path to effect longitudinal sealing. The longitudinal sealer is moved in the meantime along the path at a greater speed in the range of 1.05 to 1.30 times the specified speed of motion of the material such that generation of V-shaped wrinkles known as the chevrons on both sides of the sealed area can be prevented.

Abstract: A dual belt conveyor having a pair of long plates provided with a plurality of edge rollers brought into contact with both lateral belt edges. The long plates are arranged against both lateral belt edges of two superimposed conveyor belts, along the direction of belt travel in the vertical part, so that both long plates are opposite each other. Two link plates are rotatably attached to the long plates on one side of each link plate, and connected with each other through a central pin on the other side of each link plate. A pair of the long plates are engaged with each other through the two link plates in at least three points. The central pins are rotatably attached to an apparatus frame in at least two points. An adjusting member provided on the apparatus frame is connected with one of the central pins at the remaining point.

Abstract: An electromagnetic relay in which an iron core 2 is fixed to a yoke 3, and one end of the yoke 3 is fixed by press-fitting to a base 4. The base 4 is formed with a yoke-receiving groove 4b into which tongue pieces 3e, 3e at one end of the yoke 3 are press-fitted, and a cutout groove 4c into which a head portion 2c of the iron core 2 is received. The yoke 3 is formed with a seal projection 3f disposed by insertion in an opening end of a cutout groove 4c of the base 4. This construction of the electromagnetic relay eliminates poor operation by preventing metal chips produced during assembly from adhering to electrical contacts of the relay.

Abstract: An elongated web of bag-making material (S) is bent into a tubular form by a former (2), transported along a path (A), is filled with articles (W) and sealed by a transverse sealer (10) transversely to its direction of motion. A pair of seal jaws (20) supported by rotary arms (12) are rotated in mutually opposite directions by a power-communicating mechanism (P) which includes a trajectory-forming mechanism (H) such that the seal jaws (20) will each travel on a generally D-shaped trajectory with a linear section along the path (A) of the bag-making material (S). Cramming devices (50) are adjustably attached to the rotary arms (12) and stroke the tubularly shaped bag-making material (S) from both sides in forward-backward direction (X) without substantially closing the bag being formed such that the articles (W) can be more efficiently crammed with empty spaces among them effectively reduced.

Abstract: A bag maker bends an elongated flexible bag-making film into a tubular form and transversely seals it by a transverse sealer while filling it with articles to produce packaged bags. The transverse sealer has two seal jaws at both sides of the film being pulled downwards. The seal jaws are each caused to move in a generally D-shaped trajectory with a vertically straight portion where they move along the film, sandwiching it therebetween. The seal jaws are operated so as to move faster than the film while on the top half of the straight portion of the trajectory where stripping takes place and more slowly than the film while on the bottom half of the straight portion such that the film will blouse to make it easier for articles to drop deeper inside the bag being produced. The speed of each seal jaw on the arcuate part of its trajectory is adjusted such that the period of the cyclic motion of the seal jaws need not be modified.

Abstract: A longitudinal sealer for a bag maker-packaging machine is controlled such that when an abnormal condition is detected and the operation of the machine is stopped temporarily and then restarted after the abnormal condition is removed, the mechanism for moving the film and the heater for heating edge parts of the film to seal them together are deactivated and reactivated, but not both at the same time. Deactivation of the heater is delayed after that of the mechanism for moving the fill and/or reactivation of the movement of the film is delayed after that of the heater such that the film is certain to be longitudinally well sealed in spite of the interruption of the sealing operation.

Abstract: A bag maker-packaging machine uses three heaters to make bags, one for longitudinal sealing and two for transverse sealing. A device for automatically setting the temperatures of these three heaters includes a memory which stores temperature data from which an operator can retrieve a standard temperature, to which the longitudinal seal heater is to be set, by specifying the characteristics of the material to be used for making bags. Different temperatures, to which the two transverse seal heaters are to be set, are uniquely determined on the basis of the standard temperature. The standard temperature and the other temperatures thus determined may be displayed in different ways on one or more display devices.

Abstract: An apparatus for correcting zigzag motion of a longitudinally traveling elongated sheet includes a forward signalling sensor on the travel path of the sheet and a first correction mechanism which is on the downstream side of, and is controlled by an open-loop method according to output signals from, this feed forward sensor to quickly correct the lateral displacement of the sheet. A second correction mechanism on the downstream side is controlled by output signals from a backward signalling sensor disposed further downstream thereto to correct by a closed-loop method the error in the correction effected by the first correction mechanism. If a significant trend of the sheet to move laterally in one direction is detected, parameters in the algorithm used by the first correction mechanism are adjusted.

Abstract: A bag maker bends an elongated bag-forming film into a tubular shape, moves it longitudinally along a path, seals its mutually overlapping side edges into a tubular shape, fills it with articles to be packaged and simultaneously seals it transversely with a transverse sealer to make individual filled bags. The transverse sealer has a pair of seal jaws opposite each other across the path of the film, each adapted to move in a D-shaped closed trajectory and inwardly towards each other to transversely seal the film over a seal area. A pair of shutters is disposed on the seal jaws so as to each move behind corresponding one of the seal jaws when moving downward. These shutters are biased inward towards each other and normally protrude inwardly from the inward-facing surfaces of the seal jaws so as to prevent articles intended for the next bag to be produced will not be caught between the seal jaws when transverse sealing is effected.

Abstract: A form-fill-seal type packaging machine with a transverse sealer having a pair of seal jaws is initially operated for a number of cycles without introducing any articles to be packaged into bags which are being formed from an elongated thermoplastic film, and values of a selected physical variable indicative of the separation between the seal jaws are detected. From an average of these detected values and known variations in the thickness of the film, a standard range is determined for the selected physical variable. When the packaging is operated thereafter with articles introduced into the bags, the same physical variable is measured as each bag is transversely sealed and, if the measured value is outside the standard range, a warning is outputted or the film is not cut across the sealed position into two separated packages. The physical variable to be selected may be the torque on the motor which serves to move the seal jaws towards each other.

Abstract: A packaging machine responds, when a kind of merchandise to be produced, the film or the former which is installed thereon is inputted through a touch panel, by causing its microcomputer to compare the inputted data with the data stored in a read-only memory circuit on merchandises, films and/or formers, to display the merchandise, the identification numbers and pictorial patterns of films and/or the sizes and storage location of formers which correspond to the inputted data, and to select an appropriate merchandise, film and/or former.

Abstract: A monitoring device is used for a web roll which is rotated so as to unwind a web therefrom, for example, for making bags for a packaging machine. The speed of rotation of the web roll is detected by a revolution counter or an eye-mark sensor if the web is provided with eye-marks, and the current outer radius of the web roll is calculated from the detected speed of rotation as well as inputted data such as the length of the web required for making a bag and the number of bags being produced per unit time. The length of the web remaining in the web roll and other related data can be calculated and displayed either all at once or selectably in response to the user's instruction. An alarm signal may be outputted when the calculated outer radius of the web roll becomes small enough according to a preset criterion.

Abstract: An apparatus integrating system such as a product shipping line includes a group of integrated apparatus each provided with a memory device for storing conditions of its operation, an input device through which conditions of operation for the group of apparatus can be set, a display device for displaying conditions and actual modes of operation of the apparatus group and control devices for controlling the apparatus group. Data are exchanged among the control devices of the apparatus through a communication device. Instead of providing a memory device to each apparatus, a master memory may be provided to only one or some of the apparatus or separately and away from the group of apparatus. The user can operate on the input device of any of the apparatus to set not only the conditions of operation of that apparatus but also the conditions of operation of the other apparatus through the communication device.

Abstract: A video signal recording system is provided in which the number of horizontal scanning lines of a high-definition television system video signal is converted to be M times as large as the number of horizontal scanning lines of an ordinary television video signal. The converted video signal is divided into M vertical sections and N horizontal sections so that M.times.N sections of the divided video signal are separately recorded onto M.times.N recording media respectively. In this way, a high-definition television system video signal can be displayed on a plurality of ordinary television receivers without losing the high-definition television system picture quality.

Abstract: A form-fill-seal type combined bag maker and packaging machine uses of a longitudinal sealer to seal together mutually overlapping side edges of an elongated bag-making material wrapped around a loading cylinder in a tubular form. The longitudinal sealer has a sealing unit with a heater supported by a mobile member which can be selectably moved linearly or rotationally such that the sealing unit can be not only correctly positioned but also properly oriented with respect to the loading cylinder currently installed on the packaging machine. The mechanism for moving the sealing unit is supported on an elongated member rotatably supported by the packaging machine so as to be easily moved away when the loading cylinder is removed and replaced by another of a different kind.

Abstract: In a display control device according to this invention, video signals are given in parallel each of a plurality of extracting means via a common bus means. For this reason, each extracting means can selectively extract any of the video signals. Each extracting means extracts a portion of or all of required video signals in correspondence to a display area (an area on the display means defined by a display pattern) to be extracted from each of the video signals. The extracted video signals (concretely real luminance signals, interpolated luminance signals, and color signals) are interpolated in horizontal and vertical directions according to a magnification of the display pattern on the display means. This interpolation is an operation to supplement picture elements corresponding to a number of scanning lines and length of the scanning lines which become short when a specified area of the video signal, which is an original signal, is enlarged.

Abstract: A die plate for use in the extrusion of plastics is provided. Said die plate is capable of preventing or substantially reducing the formation of resin masses at the die face of said die plate by providing an extrusion orafice having an increased diameter in the vicinity of said die face.