Abstract: A production method of a heterologous protein, comprising culturing a heterologous protein-producing host prepared by gene manipulation in a medium containing a fatty acid or a salt thereof, and a surfactant and harvesting the heterologous protein from the culture. The production amount of the heterologous protein produced by a heterologous protein-producing host can be increased. Moreover, since decomposition of the heterologous protein by an enzyme derived from the host can be inhibited, enabling large scale production of a heterologous protein.

Abstract: An optical disc recording and/or reproducing apparatus includes a carrier mechanism, an optical pickup apparatus, a shutter and a moving mechanism. The carrier mechanism carries a disc inside and outside the apparatus. The optical pickup apparatus radiates beams on a disc carried by the carrier mechanism. The optical pickup apparatus is provided with an objective lens. The shutter exposes or closes the upper surface of the objective lens. The shutter is provided to the optical pickup apparatus so that the shutter can be moved between a first position for exposing the upper surface of the objective lens and a second position for closing the upper surface of the objective lens. The moving mechanism moves the shutter between the first position and the second position according to recording and/or reproducing operation.

Abstract: A cleaning device for a recording and/or reproducing apparatus including a rotary head device having a drum carrying a magnetic head, with a magnetic tape being used as a recording medium. The cleaning device includes a cleaning member abutted against the magnetic head of the rotary head device for cleaning the magnetic head and an actuating mechanism for causing the cleaning member to be abutted against the magnetic head in the rotating state of the rotary head device. The actuating mechanism causes the cleaning member to be abutted against the magnetic head in the rotating state of the rotary drum prior to the loading of the magnetic tape on the rotary head device by the tape loading mechanism, and releases abutment of the cleaning member against the magnetic head when loading the magnetic tape by the tape loading mechanism on the rotary head device. The magnetic head is cleaned each time the magnetic tape is loaded.

Abstract: A cassette holder for a tape player is provided with a pair of lock releasing projections which are engageable with a pair of grooves formed on the lower surface of a sliding shutter of a tape cassette. One of the projection has a width equal to or slightly smaller than the width of the groove so as to permit engagement with the grooves on the sliding shutter for restricting movement of the tape cassette in a direction transverse to a back and forth direction.

Abstract: A slider lock mechanism for locking a slider slidable along a chassis to set a plurality of modes in a tape player comprises a slider drive unit for transmitting a rotational force of a motor to the slider via a plurality of disc gears for moving the slider; spring biasing means for biasing the slider to return when the slider reaches a pressure contact position; and a braking mechanism including an electromagnetic actuator for braking one of the disc gears by energization of the electromagnetic actuator in the pressure contact position.

Abstract: A magnetic tape cassette recording and/or reproducing apparatus is provided with a novel loading system which includes a magnetic tape cassette holder movable at least horizontally between an eject position wherein the cassette holder extends from the front face of a housing of the recording and/or reproducing apparatus and a loading position wherein the cassette holder is retracted within the housing and the magnetic tape cassette is in its set position. The cassette holder is cooperative with a cassette actuating means which moves a pivotal front closure lid and a sliding lower cassette face closure member of the magnetic tape cassette between open and closed positions. The cassette actuating means is active during the movement of the cassette holder between the eject position and the loading position to open and close the pivotal closure lid and the sliding closure lid of the magnetic tape cassette.

Abstract: A recording and/or reproducing apparatus for a magnetic tape cassette has a rotary head mounted on the recording and/or reproducing apparatus and a loading mechanism for extracting a length of magnetic tape from a magnetic tape cassette and moving the length of magnetic tape to various positions corresponding to various operation modes of the recording and reproducing apparatus. The loading mechanism includes first and second movable members respectively movable along predetermined first and second paths.

Abstract: A magnetic tape cassette is provided with a pivotal closure lid pivotably secured to both sides of a casing for movement between a closed position, in which the front opening of the casing, through which a magnetic tape is accessible for loading onto a rotary head, is covered, and an open position wherein the closure lid is pivoted away from said opening to expose the tape while the cassette is in use. The magnetic tape cassette is also provided with a sliding closure member slidably mounted on the bottom of the casing and cooperative with the aforementioned pivotal closure lid. The sliding closure member is in a closed position while the pivotal closure lid is in its closed position, in which it covers a bottom clearance through which a device constituting part of a tape holding system is inserted, and in an open position while the pivotal closure lid is in its open position to allow the aforementioned device of the tape handling system to reach into the casing through the bottom clearance.

Abstract: A magnetic tape cassette is provided with a pivotal closure lid pivotably secured to both sides of a casing for movement between a closed position, in which the front opening of the casing, through which a magnetic tape is accessible for loading onto a rotary head, is covered, and an open position wherein the closure lid is pivoted away from said opening to expose the tape while the cassette is in use. The magnetic tape cassette is also provided with a sliding closure member slidably mounted on the bottom of the casing and cooperative with the aforementioned pivotal closure lid. The sliding closure member is in a closed position while the pivotal closure lid is in its closed position, in which it covers a bottom clearance through which a device constituting part of a tape holding system is inserted, and in an open position while the pivotal closure lid is in its open position to allow the aforementioned device of the tape handling system to reach into the casing through the bottom clearance.

Abstract: A tape cassette comprises a cassette housing having an upper section, a lower section, a pair of reel hubs rotatably accommodated therein for winding a magnetic tape therearound, and a front opening through which the tape is engageable with a recording and/or reproducing head. The lower section is formed with a pair of openings for respectively receiving reel shafts for rotating the hubs and thereby driving the tape, and the upper section is formed with a recess.

Abstract: A magnetic tape cassette recording and/or reproducing apparatus is provided with a novel loading system which includes a magnetic tape cassette holder movable at least horizontally between an eject position wherein the cassette holder extends from the front face of a housing of the recording and/or reproducing apparatus and a loading position wherein the cassette holder is retracted within the housing and the magnetic tape cassette is in its set position. The cassette holder is cooperative with a cassette actuating means which moves a pivotal front closure lid and a sliding lower cassette face closure member of the magnetic tape cassette between open and closed positions. The cassette actuating means is active during the movement of the cassette holder between the eject position and the loading position to open and close the pivotal closure lid and the sliding closure lid of the magnetic tape cassette.

Abstract: A cassette-type magnetic tape recording and/or reproducing apparatus is comprised of a rotary drum unit having a magnetic head or heads for recording or reproducing signals on a magnetic tape, a loading device movable between a first position and a second position by the operation of a single electric motor, a tape guide device responsive to movement of the loading device to extract the tape from a cassette and to guide the tape by being moved between an inoperative position and an operative position in which a preset tape path is defined in proximity to the drum device, and a pinch roller operating device also associated with the loading device for pressing the pinch roller against the capstan or disengaging the pinch roller from the capstan.

Abstract: A tape cassette comprises a cassette housing having an upper section, a lower section, a pair of reel hubs rotatably accommodated therein for winding a magnetic tape therearound, and a front opening through which the tape is engageable with a recording and/or reproducing head. The lower section is formed with a pair of openings for respectively receiving reel shafts for rotating the hubs and thereby driving the tape, and the upper section is formed with a recess.

Abstract: A magnetic recording and/or reproducing apparatus having a magnetic head assembly, a tape loading mechanism for loading and/or unloading a magnetic tape housed within a tape cassette onto or from the magnetic head assembly, a brake mechanism which can engage with or disengage a supply reel table and a take-up reel table, a common brakes slider for operating the brake mechanism, and a cam gear formed of first and second cam portions and which is driven by a single motor, wherein when the cam gear is rotated, operation of the tape loading mechanism is controlled by the first cam portion and operation the common brake slider is controlled by the second cam portion.

Abstract: A magnetic recording and reproducing apparatus has a housing with a movable section including a cassette holder for moving a magnetic tape cassette between an operative position and an eject position, a magnetic head assembly for carrying out the recording and reproducing operations on magnetic tape withdrawn from the operatively positioned cassette and a tape loading mechanism for loading or unloading the magnetic tape on or from the magnetic head assembly. The movable section is slidably movable in the horizontal direction between an open position where the movable section extends forwardly from the housing and a closed position where the movable section is contained within the housing. When the cassette holder is held in the operative position, the movable section can be positioned at the closed position with the housing. Further, the tape loading mechanism and the cassette holder are operated in correspondence with the motion of the movable section.

Abstract: A magnetic tape cassette is provided with a pivotal closure lid pivotably secured to both sides of a casing for movement between a closed position, in which the front opening of the casing, through which a magnetic tape is accessible for loading onto a rotary head, is covered, and an open position wherein the closure lid is pivoted away from said opening to expose the tape while the cassette is in use. The magnetic tape cassette is also provided with a sliding closure member slidably mounted on the bottom of the casing and cooperative with the aforementioned pivotal closure lid. The sliding closure member is in a closed position while the pivotal closure lid is in its closed position, in which it covers a bottom clearance through which a device constituting part of a tape holding system is inserted, and in an open position while the pivotal closure lid is in its open position to allow the aforementioned device of the tape handling system to reach into the casing through the bottom clearance.