Abstract: A cutter is composed of a blade body and a stem. The blade body has an engage hole made up of a grip hole and a lock hole which is narrower than the grip hole and is extended to and connected with the grip hole. A peripheral portion of the lock hole defines a marginal portion. The stem has a blade body mounting section for supporting the blade body being put thereon. The blade body mounting section includes an engage projection adapted to be fitted in the engage hole of the blade body. The engage projection has a lock groove for receiving the marginal portion. The stem is provided with a push member adapted when controlled to push a first portion, on the side of the grip hole, of the blade body, whereby in response to the pushing action of the push member a second portion, substantially facing the grip hole, of the blade body is curved and separated from the engage projection.

Abstract: A pair of grip scissors is provided which comprises a grip scissor body having a pair of mutually open/close-able scissor segments, a housing case capable of housing therein the grip scissor body movably in the lengthwise direction thereof and of projecting the grip scissor body outward, at least one slide groove formed in the housing case and extending in the lengthwise direction thereof, and a slider coupled to the grip scissor body and movable reciprocatingly along the slide groove of the housing case.

Abstract: A safety razor has a handle or grip foldable into a box-shaped case. The handle is made of a thin plastics blank having a multiplicity of bending lines. In use, the blank is folded into the handle having a rectangular cross section. When not in use, the blank is folded into a case with a blade holder which carries a blade being accommodated therein. The blade holder is separate from the handle and can be mounted on a blade holder mount integraly formed with an upper end of the handle. Stiffening ribs are attached to and disposed between the handle and the blade holder mount for preventing the blade holder mount from being vibrated up and down during use.

Abstract: A cutter having a circular rotary blade comprises: a handle; a blade mounting section formed on one end of the handle; a circular blade secured to one side of the blade mounting section and rotatably carried at its central portion; a slot having an opening formed in the blade mounting section at a position behind the central portion of the circular disc and corresponding to the circular blade; a pressing member movably received in the slot and projectable through the opening of the slot into pressure contact with one side of the circular blade; and an operation member adapted to limit the movement of the pressing member so as to adjust the pressure of contact between the pressing member and the circular blade, the operation member being held in engagement with the pressing member through cam means and positioned on the opposite side of the blade mounting section to the circular blade.

Abstract: A knife apparatus comprises an elongated handle member formed with a groove of a C-like cross-section, a slide unit disposed longitudinally slidably within the groove, and a blade slidably disposed in the groove and having a base portion connected to the slide unit. Locking member is provided for the slider unit and adapted to mesh with a tooth train formed in at least one longitudinal edge of the groove, to thereby immobilize the slide unit and hence the blade relative to the handle. A manipulator plate having a cam groove is disposed on the slide unit over the locking member to control the locking member, whereby the slide unit is moved between the locked and the released positions under the control of the manipulator plate.

Abstract: A safety razor having a retractable blade member. The safety razor has a platform integral with the handle portion of the razor and provided with a recess formed in the upper surface thereof, a blade support member movably received by the recess of the platform, a blade member provided with front cutting edge and secured to and supported by said blade support member so as to project forwardly from the latter, a cover member fixed to the platform and cooperating with the latter in movably holding therebetween the blade support member together with the blade member, and apparatus for moving the blade member between a first position where the cutting edge is fully retracted and disappears behind the cover member and a second position where the cutting edge is fully extended. The cover member and the platform cooperate with each other in defining therebetween an elongated opening through which the cutting edge is moved in and out as the blade supporting member is moved by the above-mentioned apparatus.

Abstract: A knife having an elongated holder provided therein with a channel to the exterior at its upper side through a slot provided in the top wall of the holder, a blade carrier having a slider slidably received by the channel of the holder, and a blade detachably secured to the blade carrier through an engagement between a projection formed on the front end portion of the slider and an aperture formed in the base portion of the blade. The knife further has a spring or the like for resiliently biasing the front end portion of the slider to bring the projection into engagement with the cooperating aperture in the blade, and a manually depressable finger portion for causing a downward movement of the front end portion of the slider to disengage the projection from the aperture in the blade against the resilient biasing force. The finger portion, which is integral with the slider through the slot, has a width greater than that of the slot, so that the finger portion cannot be depressed normally.

Abstract: A shaver unit comprises at least one blade unit, a case member and a cover member. The case member has a blade accommodating space defined therein for accommodating the blade unit while the shaver unit is not in use for shaving and a blade fitting recess for fittingly and detachably receiving the blade unit while the shaver unit is used for shaving. The cover member is detachably attached to the case member to cover the blade unit accommodated in the accommodating space. The case member further has a portion serving as a handle gripped by the user's hand during shaving.

Abstract: A two-bladed safety razor has a platform unitary with the handle of the razor. The platform movably supports a blade carrier plate which in turn fixedly carries a shaving blade unit including an upper blade, lower blade and a spacer member interposed between the upper and lower blades. A cap member overlying the upper blade is connected to the platform. Between the upper and lower blades, interposed is an ejecting member which is fixed to at least one of the cap member and the platform. Means are provided for causing a movement of the blade carrier plate and, hence, of the shaving blade unit to and from a fully retracted position relatively to the ejecting member. The ejecting member is so located that the cutting edge of the lower blade is positioned flush with or behind the front surface of the ejecting member when the blade assembly takes the fully retracted position.