80results about "Chalks" patented technology

An object of the present invention is to provide a method and device for reading an information code in which an information code displayed on a display can be read without increasing the circuit size of the display device. To read the information code displayed on the display in a predetermined area during each frame display interval, a synchronization signal synchronized with each of the frame display intervals is generated based on noise emitted from the display, and the information code is restored from a captured image signal obtained by capturing a screen of the display as an image in accordance with the synchronization signal.

A liquid chalk assembly includes a first and a second liquid chalk module that are connected together via a first coupling sleeve to point two writing heads provided at front ends of the two modules to two opposite directions. A second coupling sleeve may be further provided to connect at a first end to the front end of the first liquid chalk module and at a second end to a rear end of a third liquid chalk module. Since differently colored liquid chalk material may be contained in different modules, the liquid chalk assembly provides a user with a wide choice of colors in writing.

The invention provides a dust collecting system for recycling chalk. The dust collecting system comprises a blackboard body, an upper dust suction device, a lower dust suction device, a chalk regeneration device, an air introducing device, a controller and a display screen; the upper dust suction device and the lower dust suction device are connected to the chalk regeneration device through guide pipes so that the function that when a teacher wipes a blackboard in class, chalk dust is automatically sucked into the system and is used for secondary manufacturing of the chalk can be achieved, and therefore a good teaching and learning environment can be created, and in addition, the effects of energy conservation, low carbon and environmental protection can be achieved by secondary utilization of the chalk dust; and an introduced draught fan in the chalk regeneration device starts to work so that the internal air pressure of the device can be decreased, the chalk dust can pass through holes in the surface of a blackboard groove of the upper dust suction device and holes in the surface of a blackboard groove of the lower dust suction device and enter the chalk regeneration device through the guide pipes, and after the chalk dust is collected to a certain degree, the chalk manufacturing is started. The system has the advantages of being low in production cost, simple in structure, wide in application range, convenient to use, high in practicality and the like.

Chalk or other messy writing material is coated with wax or another easily applied material to the writing material, preventing the writing material from creating an undesirable mess.

An art medium applicator includes a rotating shaft and an art medium coupled thereto for causing the medium to travel through an application path for transfer to a substrate. The applicator includes a coupling assembly, and may include an applicator tip including a cavity into which the art medium is inserted and supported. An art medium modifier includes a rotating shaft and an art medium modifier coupled thereto for causing the modifier to travel through an application path for modification of an art medium previously applied to a substrate.

A self-righting handheld utensil comprises a weighted base having a generally rounded bottom end, an elongated region extending outwardly from the base, and a use portion. The base, by virtue of its generally rounded bottom and mass, provide for a self-righting function for the disclosed utensil such that, when placed on a flat or substantially flat surface, it counterbalances the utensil to an upright vertical orientation without the need for user intervention or the application of any external force. The base need not become uncoupled from the elongated region and use portion before the user makes operative use of the disclosed utensil. The bottom end of the base may comprise one of several structural embodiments that retain the self-righting function of the utensil.

The invention discloses an intelligent teaching blackboard. A writing wall is arranged on a wall body, and a dust treatment platform is further arranged on the wall body. A first dust suction cavity is formed in the dust treatment platform, and a plurality of dust suction heads which are arranged side by side are arranged on the dust treatment platform. The dust treatment platform is provided witha sliding dust suction sliding block, the end part of a first dust suction pipe is connected with a blackboard eraser, and a plurality of dust suction heads which correspondingly communicate with thefirst dust suction pipe are connected to the blackboard eraser. The two ends of the dust treatment platform are each provided with a chalk making module, and a mixing stirring cavity which communicates with the first dust suction cavity is arranged in each chalk making module. When the blackboard eraser is used for wiping the blackboard, powder can be adsorbed through the dust suction heads. Meanwhile, the powder in the chalk making modules can be used for mixing and stirring so that the purpose of making chalk can be achieved, and the teaching input is further reduced.

A writing board (chalkboard) tool is designed according to the technical principle of attraction between iron materials and magnetic powder. The surface of the writing board (chalkboard) can attract writings of magnetic powder, so that characters in various colors and figures in various colors can be written on the writing board (chalkboard); in addition, a magnetic iron writing board (chalkboard) eraser (9) is covered with a cloth cover (10); when the cloth cover (10) is used with the magnetic iron writing board (chalkboard) eraser (9) to erase the writing board and after the magnetic powder on the writing board is attracted by the magnetic iron writing board (chalkboard) eraser, the cloth cover is placed in a magnetic powder collection box and is then taken off to allow the magnetic powder to leave the cloth cover; the use cycles so, so that saving and environment protection are achieved.

An energy-saving chalk brush includes a box body, a chalk brush body is installed in the box body, and a suction device and a chalk forming device are installed on the box body. The energy-saving chalk brush provided by the invention has simple structure and convenient use, and can solve the problem of chalk dust.

A magnetized writing and amusement device. The device having a first end and a second end. Each of the ends having a magnet embedded with the interior. The magnetics allowing for the coupling of multiple devices together. The first end functions as a cap for the device and conceals a writing implement located within the internal structure of the device.

A novel environment-friendly blackboard system comprises a blackboard frame, four blackboards, a blackboard wiping device and a dust and waste water recovery device. The four blackboards and the blackboard wiping device are arranged on the blackboard frame. The blackboards can move in the blackboard frame. The blackboard frame comprises six vacancies, the four blackboards are located in four of the vacancies of the blackboard frame correspondingly, and the rest of two vacancies including no blackboard can facilitate blackboard movement. A chalk dust groove is arranged below the blackboards andis located at the bottom of the blackboard frame, so that chalk dust generated in the writing process falls into the chalk dust groove. The blackboard wiping device is located on the left side or theright side of the blackboard frame and comprises a dust cover, a wet wiping mechanism and a dry wiping mechanism. The wet wiping mechanism and the dry wiping mechanism are located in the dust cover.The wet wiping mechanism is located below the dust cover. The dry wiping mechanism is located above the dust cover. A water collection groove is further arranged under the wet wiping mechanism and located on the blackboard frame. The dust and waste water recovery device is arranged below the blackboard wiping device.

A wax-based coloring crayon for a porous surface and for a non-porous surface includes at least one wax; an ethoxylated fatty alcohol, stearin, a filler, at least one pigment, and optionally an additive.

The invention discloses an environment-friendly blackboard eraser which comprises a blackboard eraser body. At least one opening is formed in the lower surface of the body. A rotating brush is arranged in each opening and controlled by a motor in the body. Communicating chalk dust channels are formed in the body and include the transverse channel formed in the bottom of the body and the vertical channel formed in one side of the body. The tail end of the vertical channel is provided with an air outlet. One side of the top of the vertical channel is provided with an opening in the direction towards the interior of the body, and the opening communicates with a dust collecting area on the top of the body. The dust collecting area is provided with a water inlet and is in an inverted triangularshape, and the top of the triangular dust collecting area is provided with a storage chamber. When chalk dust is prevented from flying, chalk handwriting is erased, meanwhile the chalk dust is storedto produce regenerated chalks, the number of purchased chalks is reduced, the harm of the chalk dust to human health is reduced, and the chalk dust is effectively utilized.

The invention relates to a chalk for low-temperature ceramic painting/marking and a preparation method of the chalk. The chalk is a donor material which contains a ceramic-use coloring material with use temperature of 700 to 850 DEG C and/or a ceramic-use glaze and has a certain shape. The chalk can make a painting or mark on a base body.

The invention discloses an automatic chalk-making instrument, which comprises a blackboard body, a first vacuum cleaner, a second vacuum cleaner, a third vacuum cleaner, a first hose, a second hose, a third hose and a holding box; the first vacuum cleaner , the second vacuum cleaner and the third vacuum cleaner are fixedly installed on the left end, the right end and the upper end of the blackboard body respectively, and the first vacuum cleaner, the second vacuum cleaner and the third vacuum cleaner are respectively connected to the container through the first hose, the second hose and the third hose The box is connected; it arranges a plurality of vacuum cleaners on the blackboard, and discharges the dust inhaled by the vacuum cleaners into the containing box, which changes the situation in the prior art that the dust flies into the human respiratory tract when wiping the blackboard; The effect of cleanliness and sanitation is achieved.

The invention discloses an edible chalk. The chalk comprises beeswax base material: 51-57%, edible calcium carbonate: 4-8%, food-grade coloring material: 32-36%, glycerin: 2-4%. Oxidant: 2-4%, the beeswax base material includes surfactant: 14-18%, edible oil 8-11%, white beeswax: 52-57%, ethanol: 2-3%, palm oil: 16-22% %; The present invention is made from food-grade raw materials, and has the characteristics of non-toxic, edible and high safety.

The invention discloses a drawing chalk sharpener. Teachers always need sharpening chalks in order to draw standard lines and width, which cost time of the teachers and is harmful to the teachers' health. Two sliders are arranged by centering, two ends of each slider are supported on polished shafts respectively, the middles of the sliders and a bidirectional screw form a threaded pair, and the inner end of a scale is fixed on one of the sliders, and the outer end extends out of a shell. Both sliders of a width adjusting mechanism are provided with sharpening devices. Each sharpening device comprises a motor, a grinding wheel sharpening head and a rigid coupler. A cantilever shaft bracket and the motors are fixed on the sliders by screws. A power supply device controls start and stop of the motors, the motors drive the grinding wheel sharpening heads, and support shafts at the ends of the grinding wheel sharpening heads are supported on the cantilever shaft bracket by rolling bearings, and the grinding wheel sharpening heads of the two sharpening devices are centered. The drawing chalk sharpener is adjustable and capable of sharpening different widths of chalks, and mechanical sharpening of drawing chalks for class teaching is realized.

The invention discloses waste chalk end treatment equipment for teaching and a using method thereof, relates to the technical field of chalk, and aims to solve the problem that waste chalk ends for teaching in the prior art are low in treatment efficiency in the treatment process. A stirring box is mounted below a crushing box, the stirring box is fixedly connected with the crushing box, a pressing plate and a toothed bearing plate are arranged in the crushing box, the pressing plate and the toothed bearing plate are both slidably connected with the crushing box, a stirrer is arranged in the stirring box, a water inlet pipe is mounted at one side of the stirring box, the water inlet pipe is fixedly connected with the stirring box through a flange, a second motor is installed at the other side of the stirring box, the second motor is fixedly connected with the stirring box, a transverse moving box is installed on the front end face of a chalk mold base, and the transverse moving box isfixedly connected with the chalk mold base.

The invention discloses a device capable of collecting and recycling chalk dust. The device comprises a working box, wherein a working groove is formed in the working box, sliding grooves are formed in the upper portion and the lower portion of an inner cavity in the working groove, a collecting box is arranged in the working groove, moving sliding blocks are fixedly installed on the upper and lower end faces of the collecting box, the moving sliding blocks are installed in the sliding grooves in a sliding mode, inner cavities of the collecting box are symmetrically arranged up and down, and achannel opening is formed in the rear wall surface of an inner cavity of the collecting box. After the device is placed at a designated position, the device can automatically clean a blackboard and collect the dropped chalk dust, the collected chalk dust is reshaped into a mold and can be reused, erasing is rapid, simple and convenient, dust is prevented from being transmitted in air, and the safety of a respiratory tract of a teacher is protected.

The invention relates to a chalk forming device, in particular to a pouring type chalk forming device. The pouring type chalk forming device is high in production efficiency and low in labor intensity, and uses recycled chalks for remanufacturing. The pouring type chalk forming device comprises a bottom plate, a mounting frame, a first supporting column, a feeding mechanism, a scraping mechanism and the like, wherein mounting frames are arranged on the left side and the right side of the bottom plate correspondingly, first supporting columns are arranged on the tops of the rear sides of the two mounting frames correspondingly, a feeding mechanism is arranged on the tops of the front sides of the two mounting frames, and the scraping mechanism is arranged between the two first supporting columns. According to the device, a handle is pushed backwards to drive a rolling shaft to rotate backwards, so that a workbench is driven to move backwards, a pouring table is driven to move backwards, and the pouring and feeding effects are achieved; and the top end of a movable rod is pressed, the movable rod is pressed downwards, and a spring is compressed, so that the movable rod is driven to move downwards, a scraping plate is driven to move downwards, and the pressing effect is achieved.