Abstract:
Methods and apparatus for selectively accessing a portion of a sterile cryopreserved sample are disclosed. The apparatus may include a container configured to receive the cryopreserved sample and having a first portion and a second portion, a heat sink chamber surrounding the first portion of the container, and a heat source adjacent to the second portion of the container. The chamber may be configured to maintain a non-accessed portion of the sample in a cryopreserved state. The heat source may be configured to separating an accessed portion of the sample from the non-accessed portion of the sample while maintaining the viability of the accessed portion while the non-accessed portion is maintained in the cryopreserved state.
Abstract:
An apparatus for inflating and sealing packing cushions utilizes a controller adapted for acquiring information from preconfigured film material and automatically setting one or more operation parameters suitable for inflating and sealing the film. The controller can avoid or limit the need for user input, thus simplifying use of the apparatus.
Abstract:
A method and apparatus for determining the resonance frequency for a vibration welder (12) are described. The vibration frequencies at a predetermined vibration level and on both sides of the resonance frequency are derived and are then used to determine and operate the vibration welder (12) at the resonance frequency. In one embodiment the vibration frequency of the vibration welder (12) is swept up from one side of the resonance point and the vibration amplitude is monitored and a first frequency at a particular vibration amplitude is determined. The same sweeping is done from the other side of the resonance point and a first frequency at a particular vibration amplitude is determined. The same sweeping is done from the other side of the resonance point and a second frequency determined for the same vibration amplitude reference level but on the other side of the resonance frequency. The two measured frequencies are then combined to yield the resonance frequency which can then be used to operate the vibration welder (12).
Abstract:
A cutting assembly and seal integrity monitoring system for a filling and heat sealing line is disclosed which has a continuous conveyor (12) which moves containers (15) past a filling station, a heat seal station (20), a seal integrity monitoring system (26) and a cutting station (28). The cutting station (28) includes a carriage plate (50) and a cutting member (60), (190) mounted on the carriage plate (50). A drive belt (138) is connected to the carriage (50) for driving the carriage (50) on linear bearings (44) and a lifting ram (78), (238) is provided for raising the cutting assembly (60) so that the cutting assembly (60) can be raised and lowered to perform a cutting operation. A seal integrity monitoring system includes cameras (310) which monitor the seal area of a container and supply information to a processor (320). The processor (320) analyses the data received by the cameras by determining the grey intensity of light received and comparing the grey intensity with predetermined intensities so as to determine whether the seal is intact or broken.
Abstract:
When treating items with high-frequency electric power there is a need for making a correct impedance matching can be made between a generator and a tool holding the item to be treated, and there is a need to avoid the formation of standing waves in transmission lines, etc.. In addition there is a need to be able to treat items having a dimension which is comparable with the wave length at the frequency used, and to be able to exactly measure the power transmitted to the treated item. This object is attained by means of a method which comprises tuning of a circuit to resonance and adjustment of an impedance transforming ratio to correct impedance matching, as well as correction of said adjustments during the treatment of the item. For carrying out the method an apparatus is provided which comprises at least two variable impedances as well as means for detecting deviation from resonance and from correct impedance matching. The two variable impedances are preferably a continuously variable capacitor and a continuously variable coil, and the detection is performed by measuring of the standing wave ratio on the transmission line.
Abstract:
A spigot (22) and socket (20) are welded together by inducing a current in an induction member (12) embedded in the weld region. The temperature of the induction member (12) rises until it reaches its Curie temperature, at this point the temperature ceases to rise. The induction member (12) may be embedded in one or both of the spigot (22) and socket (20) or in a separate collar (10) interposed between the two. A welding appliance (30) for inducing current in the induction member may be in the form of a clamp for simultaneously inducing current and clamping the socket (20) onto the spigot (22). A method of forming a socket (20) makes use of extrusion, and includes steps of expanding a tube end, and retracting it over a collar (10) including an induction member (12).
Abstract:
An electro-welding sleeve (A) with a heating component (3) is equipped with an input-output medium (4) for identifying pertinent production and welding data. This input-output medium works bidirectionally, and so the data generated when sleeve (A) is positioned, such as actual welding parameters, working site and ambient temperature, can be stored in the input-output medium (4) of the welding sleeve after the welding process. The sleeve can thus be unmistakably identified at any time.
Abstract:
Die Erfindung bezieht sich auf ein Verfahren zum Messen und/oder Regeln der Schwingungsamplitude eines Ultraschallschwingers (17) einer Ultraschallvorrichtung. Um auf einfache Weise die Schwingungsamplitude des Ultraschallschwingers (17) zu messen bzw. zu regeln, wird vorgeschlagen, dass zumindest einem Bauelement des Ultraschallschwingers (17) ein die Schwingungsamplitude erfassender Sensor zugeordnet wird.
Abstract:
Die Erfindung bezieht sich auf ein Verfahren zum Abquetschen und Abdichten eines Rohres, wobei das Rohr (24) zwischen einer Sonotrode (10) und einem dieser zugeordneten Amboss (22) einer Ultraschallschweißvorrichtung angeordnet ist, die Sonotrode erregt und relativ zu der Gegenelektrode zum Abquetschen und Abdichten des Rohres verstellt wird. Um ein automatisches Abquetschen und Abdichten eines Rohres zu ermöglichen, ohne dass zuvor individuell die Daten des Rohres in eine Ultraschallschweißvorrichtung einzugeben sind, wird vorgeschlagen: - Anordnen des Rohres und Fixieren dieses zwischen der Sonotrode und dem Amboss, - Bestimmen zumindest einer charakteristischen Größe des Rohres bei zwischen der Sonotrode und dem Amboss fixiertem Rohr, - Abrufen von abgelegten Schweißparametern unter Zugrundelegung der zumindest einen charakteristischen Größe und - Erregen der Sonotrode und Relativbewegung der Sonotrode und dem Amboss zueinander zum Abquetschen und Abdichten des Rohres.
Abstract:
A detector detects thermal radiation being emitted from a fusion bond site while a laser beam impinges on and heats at least a portion of the bond site. The detector can provide an electrical signal to a signal processor for controllably adjusting the laser beam power. The electrical signal may be substantially correlated to the temperature of at least a region of the bond site. A workpiece support preferably positions a first and second polymeric body so that a fusion bond site is formed. The laser impinges on at least a portion of the fusion bond site such that it emits thermal radiation. The detector senses the thermal radiation and preferably provides a signal to the signal processor. In an aspect of the present invention, the signal processor controllably adjusts the power of the laser beam based on the signal provide by the detector.