摘要:
The invention provides an apparatus and method for automatically opening a plastic bag-type liner as part of a container lining process. The apparatus comprises at least one movable jaw assembly disposed on each side of the liner to be opened and a tongue on the other side of the liner opposing each jaw assembly. To open the bag, the jaws are opened and the jaw assemblies are moved toward and contact the liner and the opposing tongue pushes the liner between the gripping surfaces of the jaws of the opposing jaw assembly as the jaw assemblies begin to move apart, the jaws close, gripping and retaining the layer of liner in direct contact with the gripping surfaces of each jaw, the tongues slide out from between the layers of the liner, separating the sides of the unsealed end of the liner. A stream of air may then be directed into the open end of the bag for completely blowing the bag open prior to placing the bag over the open end of the container to be lined and forcing the liner into the container.
摘要:
A memory system includes at least one or more memory module boards identical in construction and a single computer board containing the control circuits for controlling memory operations. Each board plugs into the main board and includes a memory section having a number of rows of memory chips and an identification section containing circuits for generating signals indicating the board density and the type of memory parts used in constructing the board's memory section. The main board control circuits include a number of decoder circuits which couple to the identification and to the memory section of each memory module board. The decoder circuits receive different address bit combinations of a predetermined multibit address portion of each memory request address. In response to signals generated by the identification sections of the installed memory boards, the decoder circuits are selectively enabled to decode those bit combinations of the address portion specified by the sections for enabling successive addressing of all of the blocks of location within the system.
摘要:
Soft error rewrite control apparatus is included within a memory system for rendering the semiconductor memory modules less susceptible to single bit errors produced by alpha particles and other system disturbances. During a number of successive memory cycles occurring at a predetermined rate, the soft error rewrite control apparatus enables the read out of information stored within each module location, the correction of any single bit errors contained therein and the rewriting of the corrected information back into such location. Diagnostic apparatus is further included which is connected to place the memory system in a state for testing and verifying the operation of the soft error control apparatus. Also, the diagnostic apparatus is connected to condition the soft error control apparatus for operating in a high speed mode enabling the read out correction and rewriting of each location to take place within a minimum amount of time. By monitoring the status of the information being corrected, the diagnostic apparatus is able to signal whether or not the soft error control apparatus is operating properly.
摘要:
A printed circuit board assembly includes at least two layers which is able to accommodate a subsystem such as a memory subsystem designed to have one or more optional features. The two layers of the printed circuit board when etched include the required number of horizontal and vertical paths to be connected to all of the integrated circuit chips to be positioned and interconnected thereon. The required holes for such integrated circuit chips when drilled include first sets of holes for mounting groups of integrated circuit chips required for implementing a first group of features and which are to be interconnected to the other integrated circuit chips of the subsystem mounted on the different sections of the board. Second sets of holes are included on the board so as to have a predetermined relationship with the first sets of holes for mounting alternative groups of integrated circuit chips to be interconnected in a manner to implement other features. Thereafter, the circuit board is populated with only those integrated circuit chips required for construction of a memory subsystem with one or more selected features.
摘要:
A tracking control apparatus, for use with a rotating-head magnetic tape player, provides a tracking control head in fixed rotational association with a playback head so that both scan corresponding parallel paths across the width of the tape in fixed relationship with each other. By so mounting the tracking control head that it overlaps adjacent recorded tracks and senses periodic information included therein, the apparatus provides a control signal for driving a tape capstan servo without need for the additional control track usually required by such apparatus. The periodic information may be, for example, the horizontal sync of a video signal in the adjacent tracks; the control signal is then derived from a comparison of the respective amplitudes of such horizontal component from each track. Since the overlapping position of the tracking head is fixedly related to the tracking position of the playback head, the control signal is indicative of the tracking alignment of the playback head itself. By further mounting the tracking head on the playback head wheel, and by using the record head during playback for such purpose, a dynamic real-time tracking apparatus is provided which additionally dispenses with a separate tracking control head.
摘要:
A reel drive apparatus is provided for driving the reels of a coaxial-reel tape cassette in fast forward or reverse. In one embodiment, as the cassette is placed on a tape recorder, a friction wheel mounted for rotation on a flexible shaft extending from the recorder locates in a space defined between a pair of concentric flanges mounted for rotation with respect to the reels. The friction wheel is disposed to alternately engage the concentric flanges and reversibly drive the reels. By securing each flange to a corresponding one of the coaxial reels, the tape is positively transported in either direction.
摘要:
Apparatus and a method for generating timing signals to be utilized in latched type memories only when the address signals are valid. A CAS signal is generated in response to an RAS signal via a device which tracks the worst case delay of memory address signals and does not permit the application of the CAS signal to memory until the worst case delay of the memory address signals has been accounted for.A memory array is comprised of any combination of latched or non-latched tri-state memories. The latched memories are coupled to a data bus utilizing conventional TTL circuits in combination with a power driver to simulate conventional tri-state buffer circuits. When the power driver/drivers remove(s) power from TTL circuits, the tri-state characteristics are simulated; whereas when the power driver applies power to the TTL circuits, they operate in their normal mode and present a normal impedance between the data bus and data-out lines of the memory array.
摘要:
Apparatus and method for generating substrate bias for the refresh apparatus of volatile memory elements associated with data processing units. A refresh oscillator in the refresh apparatus is utilized to drive a chopper circuit or high level driver in combination with a rectifier network for obtaining raw negative voltage. The raw voltage is filtered and adjusted to the correct value on the metal oxide semiconductor (MOS) memory board and distributed to each random access memory (RAM).
摘要:
An apparatus is disclosed which comprises an improved voltage driver circuit. Commonly available voltage driver circuits are deficient for driving n-channel MOS RAMs due to insufficient peak voltage and extended rise time. The apparatus, without requiring an additional voltage power supply or modifications to the memory system environment, effectively increases an internal drive voltage which results in the desired performance characteristics for driver circuits.
摘要:
A vaginal treatment composition that employs a therapeutic agent to inhibit and/or treat vaginal infection is provided. The therapeutic agent is capable of inhibiting and/or killing Gardnerella (e.g., Gardnerella vaginalis), Candida (e.g., Candida albicans), and/or Trichomonas (e.g., Trichomonas vaginalis) pathogens. Desirably, such antimicrobial efficacy is achieved without substantially inhibiting the growth of Lactobacillus acidophilus. For instance, sugars and/or sugar alcohols may be employed in the present invention as a therapeutic agent for inhibiting and/or treating vaginal infection. In one particular embodiment, D-xylitol is used as the therapeutic agent.