935results about "Erasing devices" patented technology

An apparatus and/or method for controlling an ion beam may be provided, and/or a method for preparing an extraction electrode for the same may be provided. In the apparatus, a plurality of extraction electrodes may be disposed in a path of an ion beam. At least one extraction electrode may include a plurality of sub-grids.

[Object] To provide a reversibly thermochromic composition free from accidental discoloration by heat conducting from the opposite side writing surface or by self-heating due to quick writing; and also to provide a solid writing material and a writing ink composition comprising that composition.

[Means to solve the problem] A reversibly thermochromic composition comprising a combination of: (a) a reversibly thermochromic component capable of being discolored or decolored by heat and (b) a component for controlling heat conducting to the reversibly thermochromic component; and also a solid writing material and a writing ink composition comprising that composition.

To prepare a shaped product comprising a thermal adhesive fiber under moisture and having a fiber aggregate nonwoven structure. In the shaped product, the thermal adhesive fibers under moisture are melted to bond to fibers constituting the fiber aggregate nonwoven structure and the bonded fiber ratio is not more than 85%. The shaped product has an apparent density of 0.05 to 0.7 g/cm³, a maximum bending stress of not less than 0.05 MPa in at least one direction, and a bending stress of not less than ⅕ of the maximum bending stress at 1.5 times as large as the bending deflection at the maximum bending stress. The moistenable-thermal adhesive fiber may be a sheath-core form conjugated fiber comprising a sheath part comprising an ethylene-vinyl alcohol-series copolymer and a core part comprising a polyester-series resin. Such a shaped product can be used for a building board or the like since the shaped product has a high bending stress although the product is light and has a low density.

A pushbutton controlled correction tape assembly includes a casing having therein a correction tape assembly having an application head, a pushbutton assembly received in the casing to selectively extend the application head of the correction tape assembly out of the casing so as to apply a correction tape to a surface.

A two piece eraser assembly for use as a rotary tool attachment for abrading surfaces enables quick and easy replacement of worn eraser disks without requiring the assistance of any hand held tools in either the removal or in the reinstallation process. The assembly, including aftermarket replacement parts therefor, comprise an eraser disk and an eraser hub for mounting and holding the eraser disk. The eraser hub includes upper and lower surfaces, wherein the eraser hub upper surface features a centrally positioned throughbore, a flange at the peripheral edge of the hub and a stub shaft on the lower surface positioned axially with the throughbore. The eraser hub includes a plurality of spaced apertures for engaging with and detachably locking eraser disk extensions on the backside, so the eraser disk is mounted flush with the eraser hub. The upper surface of the eraser disk includes a central recess and an aperture in the recess keyed for axially alignment with the throughbore of the eraser hub. The eraser disk is also equipped with a plurality of abrading teeth running radially from the central recess to the peripheral edge thereof. The lower surface opposite the upper surface of the eraser disk further comprises a plurality of mounting elevations keyed for engaging with the spaced apertures or slots in the eraser hub for securely locking the eraser disk to the eraser hub, avoiding slippage of the eraser disk during operation, while allowing quick replacement when worn with manual dexterity only.

A glass dry-erase board. The glass dry-erase board has a smooth transparent glass writing surface. One embodiment utilizes tempered glass sheet, which provides the writing surface and has a non-specular and light blocking rear surface treatment and attached white plastic sheet on the back side of the glass sheet. The glass dry-erase board may include additional features such as wall mounts or one or more utensil trays.

A blackboard eraser including a cube having two semi-cylindrical grooves symmetrically arranged in a longitudinal direction therein, and a central brush atop an elevated surface formed between the two grooves. A longitudinal groove is defined underneath each of the send-cylindrical grooves, and equal-length side brushes, which are affixed to an inner surface of a lid, are respectively positioned in the longitudinal grooves. Two grooves are arranged adjacent to each end of the semi-cylindrical grooves, which provide for a shaft affixed to each end of a roller to dispose therein. The brushes and the rollers form the eraser, which are enclosed within a closed chamber between the lid and the two semi-cylindrical grooves. When erasing chalk dust from a blackboard, the chalk dust sticks to the rollers and is carried to the side brushes. The side brushes then wipes the dust, which falls into the closed chamber.

A marker eraser system for efficiently combining an eraser with a dry erase marker. The marker eraser system includes a body having a tubular structure and a central aperture extending through the tubular structure. The central aperture extends through an inner end to an outer end of the body. An eraser member is attached to the outer end of the eraser unit to erase a removable ink from a dry erase marker. An outer end of the central aperture frictionally receives an outer portion of a first end of a cap of the dry erase marker to allow a user to removably attach the marker eraser system to the cap of the dry erase marker.

A friction body for allowing an image having reversible thermochromism to change color from a first state to a second state by frictional heat, wherein the above-mentioned frictional body has a contact area ranging from 0.5 to 15 mm² when pressed onto a glass plate with a load of 1000 g, a writing instrument containing a reversible thermochromic ink, which is provided with the above-mentioned friction body, and a writing instrument set having the writing instrument containing a reversible thermochromic ink and the above-mentioned friction body.

A writing instrument, which has an inner and outer writing element with separate writing medium reservoirs. The writing elements are coaxially mounted in an outer barrel and axially moveable with respect to one another. A driving mechanism may be actuated to allow a user to selectively extend one writing element. The inner and outer writing elements may have an inner sleeve therebetween to improve, for instance, rigidity of the outer writing element and to prevent contamination of the writing medium reservoirs. An outer sleeve may also be provided over the outer writing element. The outer sleeve can function to hold various components of the outer writing element together, and to allow for clean and easy refill of the outer writing element, especially when the outer writing element is a porous nib with a filler-type writing medium reservoir. The writing instrument is designed so that a user can replace the inner and/or outer writing elements when their respective writing medium have been expended.

The present invention provides a resin composition having excellent dispersibility, discoloration resistance and antimicrobial properties by blending a resin (A) with an antimicrobial agent (B) in which at least one kind of metal ion selected from the group consisting of silver, copper, zinc, and tin is supported on zeolite, and an antimicrobial agent (C) that includes a silver ion-containing phosphate as an active ingredient, or an antimicrobial agent (D) made of a soluble glass powder containing silver ion.

A cap assembly for closing a container. The cap assembly has: (i) an undercap having a cap body with a top end (or wall) and with at least one endless side wall depending from the top end (or wall) to form a housing for receiving the neck of a container; (ii) an overcap having an overcap body with a top end and with at least one endless side wall depending from the top end to form a housing for receiving and engaging the (cap body of the) undercap; and (iii) an applicator having a stem with a first end for engagement with, or integrally formed with, the undercap within the housing, so that the stem projects from the housing, and a second free end for applying product. The exterior of the undercap body has a series of circumferentially arranged teeth for interengagement with a corresponding series of circumferentially arranged teeth within the housing of the overcap. The two series of teeth being interengageable at a number of relative positions, so that the relative orientation of the overcap to the undercap can be selected. As the undercap is adapted to be attached to the container, relative orientation of the overcap and the container is thus also selectable. In an alternative arrangement the two series of teeth form a safety or child proof cap arrangement. However, the application of a sufficient downward force upon the overcap causes the engagement of the two series of teeth allowing a user to rotate the overcap and undercap in unison. Biasing means may be provided to bias the overcap and undercap apart so that pressure must be applied against the biasing means to remove the cap assembly. Applicators are also provided as an assembly comprising an undercap and an applicator which can be assembled by screwing the undercap on a container into which the applicator has first been placed.

An ergonomic instrument is comprised of an elongated body with a writing tip or tool at the lower end, and an upper end for supporting the base of the index finger. Arcuate arms extending up from the upper end of the body are arranged for being positioned on the sides of the index finger. A concave front groove is arranged along the front side of the body for cradling the tip of the index finger. Concave side grooves are arranged along the sides of the body for cradling the tips of the thumb and middle finger. Forwardly protruding ears are arranged between the front and respective sides for being pinched between the index finger and the thumb, and between the index finger and the middle finger.

A reversibly thermochromic aqueous ink composition comprising water, a water-soluble organic solvent, a reversibly thermochromic microcapsule pigment, a comb-shaped polymeric dispersant having a carboxyl group in a side chain thereof, a nitrogen- and sulfur-containing organic compound, and a water-soluble resin, wherein a reversibly thermochromic composition comprising (A) an electron-donating color-developing organic compound, (B) an electron-accepting compound and (C) a reaction medium that determines the temperature at which the color-developing reaction between the components (A) and (B) occurs is encapsulated in the reversibly thermochromic microcapsule pigment; a writing instrument produced using the ink composition; and a writing instrument set comprising the writing instrument and a friction body.

A writing instrument adapter comprises a tubular housing having a first end adapted to releasably hold a writing instrument such as a pencil, and a second end that provides a cap function and that in one embodiment, is adapted to hold an eraser. The adapter defines air passage means within the housing so that breathing may continue and suffocation may be averted in the instance where the instrument is accidentally lodged in the mouth or throat of a user.

When encoding and decoding are concurrently executed by sharing one image memory, the present invention is able to flexibly cope with a situation in which a change occurs in the image size subject to processing. A memory allocation processing block receives information about the image size and the number of images that are specified for each of encoding and decoding, individually allocates the memory areas corresponding to the specified image size by allocating these memory areas to the free area in the image memory in the number equivalent to the number of images, and outputs the addresses of the allocated memory areas. A memory area management block holds memory area information in which the correlation between the identification information of each allocated memory area and the access information for accessing each memory area and receives the requests from the encoder and the decoder for using the allocated memory areas and returning the used memory areas, thereby managing the use status of each memory area on the basis of the memory area information.

The present invention generally relates to writing tools for applying volatile marking substances over articles but not including removable caps in one ends thereof to prevent drying of their tips. More particularly, the present invention generally relates to writing tools with one or more caps movably or fixedly couple with such tools, operate between off-states and on-states, obstruct openings of such writing tools in order to prevent drying of their tips in the off-states, and clear such openings so as to expose their tips through the openings in the on-states, where the caps are preferably synchronized with the tips. The present invention also relates to various methods of preventing drying of such tips of the writing tools without having to use removable caps, those of incorporating various caps into the writing tools and obstructing and clearing the openings of the writing tools thereby, those of exposing and enclosing such tips between use and rest positions while preventing or minimizing leaking of the marking substances out of the writing tools, those of and so on. The present invention further relates to various processes of providing any of the above writing tools, their members, and/or their units.

A combination pen, pencil and circular marking implement that can be utilized as a pen or pencil writing tool and for circular ink marking on printed surfaces for word game and puzzle solution includes a central passageway for accommodating ink cartridges or lead pencil cartridges encompassed by an ink reservoir that communicates with a cylindrical marking die for circling numbers and letters, and the marking die capable of advancement or retraction by rotation of a tool gripping collar attached to the body of the combination writing and marking implement whereupon rotation of the tool gripping collar engages internal cams for actuating the advancement and retraction of the marking die so that either the pen/pencil writing function or the circular ink marking function can be selected for use.