117 results about "Thermal paper" patented technology

The invention discloses a thermosensitive desktop barcode printer capable of adapting to various paper widths, the device comprises a printing seat and a pressing cover, a roll paper fixing piece and a paper feeding channel are arranged in the printing seat, a Bluetooth module used for being in control connection with a computer or a mobile terminal is arranged in the pressing cover, centering positioning blocks are arranged on two sides of the top of the paper feeding channel in a sliding manner; centering positioning clamps are arranged on the outer walls of the two sides of the roll paper fixing piece in a sliding mode, synchronous driving pieces are arranged between the centering positioning blocks and the centering positioning clamps, a driving rubber roller is arranged at the outer end of the paper feeding channel, and an anti-scraping and anti-tearing paper cutter is rotationally arranged at the position, located on the outer side of the driving rubber roller, of the bottom of the gland. The distance between the two sets of centering positioning blocks and the two sets of centering positioning clamps is adjusted through the synchronous driving piece to adapt to thermo-sensitive paper of different widths, meanwhile, the anti-scraping paper tearing knife can be made to tilt when the rubber roller is driven to rotate, the phenomenon that a printed object is scratched by a sawtooth-shaped paper tearing knife edge in the printing process is avoided, and meanwhile paper clamping is avoided.

The invention discloses a two-color printing method based on a thermal printer. The two-color printing method comprises the steps that a two-color printing mode is started; performing color configuration on different types of to-be-printed information, and respectively setting the to-be-printed information as a first color and a second color; converting the character data to be printed into dot matrix data; according to the color configuration, converting the dot matrix data into double-color printing dot matrix data according to a double-color printing data encoding format; the control chip of the thermal printer separates second color printing data from the two-color printing dot matrix data, and respectively restores all the two-color printing dot matrix data and the second color printing data into 1-bit single-color printing dot matrix data; calculating the first color heating time and the second color heating time of the double-color thermo-sensitive paper according to the restored double-color printing dot matrix data and the second color printing data; and according to the first color heating time and the second color heating time, the printing head is controlled to heat the two-color thermo-sensitive paper in a time-sharing mode, and two-color printing is achieved. The printing information identification degree can be improved.

The invention firstly provides a structure of environment-friendly bottomless paper type thermo-sensitive paper. The structure comprises a base material, and a thermo-sensitive coating and a silicone oil layer which are sequentially laminated on one surface of the base material, the thermosensitive coating comprises a color developing layer, a pre-coating layer and a bottom coating layer which are laminated in sequence, and the bottom coating layer is laminated on one surface of the base material; secondly, a coating system is provided, and a color developing agent comprises 4, 4 '-sulfonyl diphenol; the invention also provides a preparation method which is used for preparing the thermo-sensitive paper by adopting the structure and the coating system, and comprises the following steps: coating the color developing layer on the surface of the pre-coating layer by using curtain coating; a novel structure is designed, a basis is provided for the self-curling release performance of the thermo-sensitive paper, a coating system uses 4, 4 '-sulfonyldiphenol, so that the color saturation, the light resistance and the stability of the thermo-sensitive paper can be improved, the thermo-sensitive paper does not react with silicone oil, the release performance is improved, a curtain coating method is adopted based on the structure and the coating system, and the self-curling release performance of the thermo-sensitive paper is improved. And the coating uniformity, color development and other properties of the thermo-sensitive paper are effectively improved, and the environment-friendly thermo-sensitive paper which is fast in reaction, bright in color and high in definition during printing is integrally formed.

The utility model discloses a label printer belongs to label printing technical field, and this printer includes printer casing, installation chamber, thermal paper roll, base, mounting base, connecting block, connecting block, side baffle, dust absorption net cylinder, dust absorption box, dust absorption pipeline and micro -pump, through micro -pump makes the dust absorption box place produce suction, thereby can make the dust of thermal paper roll contact mounting base outer wall inhale, and through dust absorption pipeline enter the inside of filter box and be blocked by filter core, thereby can avoid the purpose that the impurity dust of thermal paper roll surface exists and influences the imaging effect, through the pull handle, can conveniently draw out filter core and clean or replace, and through the fixed connection between dust absorption box and both sides side baffle, can make the opening of dust absorption box always face upwards, and further make the effect of dust absorption better.

The utility model discloses a high-speed coating machine which comprises a coating structure, a protective frame is arranged at the output end of the coating structure, a leveling structure is arranged in the protective frame, a winding roller is arranged at the end, away from the coating structure, of the protective frame, and an electric heating roller is rotationally connected into the protective frame. Electric heating rods are arranged in the electric heating roller in an annular array mode. According to the high-speed coating machine provided by the utility model, the leveling structure is arranged, the thermo-sensitive paper is forwards conveyed to the lower part of the tensioning roller after being coated, the tensioning roller moves downwards through matching of the reset spring and the pushing of the crossed jacking rod, so that the thermo-sensitive paper can be tensioned, and meanwhile, the tensioning roller rotates along with the movement of the tensioning roller while the thermo-sensitive paper is conveyed; therefore, the friction force generated when the thermo-sensitive paper is pressed can be effectively reduced, and the thermo-sensitive paper can be effectively prevented from being torn due to overlarge friction force.

A control device includes: a print data acquisition unit configured to acquire print data, which is formed of a plurality of lines and indicates a coloration state of each pixel included in the plurality of lines; a head drive unit configured to supply, to a thermal head formed of a plurality of heating elements each corresponding to the pixel, an electric current for heating the thermal head for each pixel; a motor drive unit configured to supply, to a motor configured to move heat-sensitive paper relative to the thermal head, a drive current for step driving the motor for each line; a speed control unit configured to control, based on the number of colored pixels of a determination subject line among yet-to-be-printed lines of the print data, a relative moving speed of the heat-sensitive paper moved by the motor; and a preheating control unit configured to cause the head drive unit to output, when the determination subject line is a specific line being a line in which the number of colored pixels of the determination subject line exceeds a predetermined value, a preheating current being an electric current for heating the thermal head to such a degree as to prevent coloring of the heat-sensitive paper by a time the specific line is printed.

The application provides a heat-sensitive paper scratch resistance standard, a quality detection standard determination method, a detection method and equipment. The heat-sensitive paper scratch resistance equipment applies different pressures to a scratch head through a pressure device, cooperates with different speeds, and performs scratch resistance testing on the heat-sensitive paper under the same scratch testing material, different testing speeds and different testing pressures. The heat-sensitive paper scratch resistance quality detection method is used for detection according to the testing result. The testing method is scientific, has strong repeatability, and the testing result is stable. The quality of the product can be judged according to the testing result to determine whether the quality meets the requirements. For the unqualified product, loss can be stopped in time, and resource waste is reduced.

The heat preservation carton comprises a carton body and a carton cover, a supporting frame is installed in an opening of the carton body, a first groove of a frame-shaped structure is formed in an inner ring of the supporting frame, a first fixing frame is inserted into the first groove, a heat preservation bag is installed in the first fixing frame, and a second fixing frame is installed in the heat preservation bag. A second groove of a frame-shaped structure is formed in the position, located on the outer side of the first groove, of the supporting frame, a second fixing frame is inserted into the second groove, a heat preservation film for sealing an opening of the heat preservation bag is installed on the surface of the second fixing frame, and positioning assemblies for fixing the carton cover to the carton body are installed on the two sides of the carton cover correspondingly. The heat preservation carton is simple in structure, the heat preservation bag and the heat preservation film can be rapidly assembled through the first fixing frame and the second fixing frame, the opening of the heat preservation bag can be sealed through the heat preservation film, the internal heat preservation effect is improved, the carton cover does not need adhesive tape, and the carton cover and the carton body can be rapidly connected and fixed through the inserting block.

The utility model relates to the technical field of flatness detection and correction equipment, and discloses flatness detection and correction equipment for thermo-sensitive paper, which comprises a detector body, the surface of the detector body is hinged with a touch display screen through a hinge, the back surface of the touch display screen is fixedly connected with a supporting assembly, and the supporting assembly is fixedly connected with the detector body. The bottom of the supporting assembly is rotatably connected with a movable seat, the interior of the movable seat is in threaded connection with a pushing assembly, the top surface of the detector body is sleeved with four groups of sockets, fixed sleeves are inserted into the sockets, and the interiors of the fixed sleeves are slidably connected with telescopic assemblies. According to the flatness detection and correction equipment for the thermo-sensitive paper, through the arrangement of the supporting assembly and the pushing assembly, the effect of adjusting the angle of the touch display screen is achieved, an operator can check information on the screen more easily, visual fatigue caused by a poor visual angle is reduced, and the comfort and adjustability of the flatness detection and correction equipment for the thermo-sensitive paper are improved.

The utility model discloses a thermo-sensitive paper coating machine with a cooling mechanism, which comprises a coating machine body, the middle part of the coating machine body is rotatably connected with a cooling roller, and the cooling roller is used for rapidly reducing the temperature of a coating after coating; the cooling water tank is arranged on one side of the coating machine body, fins are arranged in the cooling water tank, a refrigeration part is installed at one end of each fin, and a water pump used for conveying cold water into the cooling roller is installed at the top of the cooling water tank. The double-layer cooling system disclosed by the utility model has the beneficial effects that the double-layer cooling system can be used for rapidly reducing the temperature of paper and improving the production efficiency; the cooling water forms closed circulation between the cooling roller and the cooling water tank, so that the water waste is reduced, and the cooling efficiency is improved; air in the air cooling assembly is filtered and dehumidified through the filter box before being blown to the thermo-sensitive paper, so that the cleanliness and dryness of the air are ensured; this helps to prevent adverse effects of moisture and impurities in the air on the thermo-sensitive paper.

This invention relates to a two-color erasable thermal paper and its preparation method, belonging to the field of printing consumables technology. The two-color erasable thermal paper includes, from top to bottom, a protective layer, a thermal coating layer, a base layer, and a substrate. The components of the thermal coating layer, by weight, include: 10-20 parts of filler B, 20-40 parts of color developer, 30-50 parts of adhesive resin B, 10-20 parts of dye, and 10-20 parts of temperature-regulating agent. The addition of a temperature-regulating agent to the thermal coating layer of this invention enables reversible erasing and writing, while improving its color retention performance, eliminating the need for sensitizers. The heat-insulating filler used in the base layer layer of this invention is a high-hollow-ratio material, which can enhance heat insulation and improve the heat resistance and sensitivity of the thermal two-color reversible erasable paper.

The invention relates to the technical field of thermo-sensitive paper, and provides a thermo-sensitive paper surface adhesive and a preparation method thereof. The preparation method comprises the following steps: adding calcium carbonate, kaolin, nano silicon dioxide and expanded microspheres into deionized water, and adding a dispersing agent for dispersion treatment to obtain composite slurry; the preparation method comprises the following steps: adding chitosan into organic acid to prepare an acid solution of chitosan, then adding the acid solution of chitosan, cationic starch, polyvinyl alcohol and water-based acrylic emulsion into deionized water, stirring and dissolving to obtain a mother solution of the composite water-based adhesive; adding the composite slurry into a composite water-based adhesive mother solution, and stirring to obtain a surface adhesive coating solution; and coating the surface of thermosensitive base paper with the surface glue coating liquid, and carrying out drying treatment to obtain the thermosensitive base paper surface glue. According to the preparation method of the thermosensitive base paper surface adhesive, the heat insulation property, the surface strength, the flatness and the coating adaptability of the base paper are synchronously improved on the premise of not damaging the color development performance of a thermosensitive layer.

The invention relates to the technical field of thermo-sensitive paper production and processing.The mother roll slitting mechanism of the thermo-sensitive paper slitting machine comprises a slitting machine body, a slitting rack is fixedly installed on one side of the slitting machine body, a support and a base are fixedly installed at the top of the slitting rack, and a pressing roller is rotationally installed at the top of the support; the top of the bracket is provided with a processing assembly for slitting the thermo-sensitive paper; the two side frames are both arranged at the top of the base, and one side of each side frame is provided with an anti-wrinkling structure used for rolling a thermo-sensitive paper mother roll to be flat; the supporting seat is fixedly mounted at the top of the side frame, a supporting rod is fixedly mounted on one side of the top of the supporting seat, and an adjusting rod and a guide rod which are in contact with the supporting rod are arranged on the supporting seat; the two side frames drive the supporting rods and the adjusting rods which are used for fixing the mother rolls to synchronously adjust the distance, the adjusting rods and the supporting rods on the two sides can conduct adaptive limiting on the mother rolls with different widths, and therefore the mother roll slitting device can be suitable for slitting the mother rolls with different widths.

The utility model discloses a thermo-sensitive paper adhesive sticker coating machine, which relates to the technical field of thermo-sensitive paper adhesive coating machines and comprises a main body, a limiting shaft, a steering shaft and a plurality of auxiliary shafts are rotatably connected in the main body, and guide belts are sleeved outside the limiting shaft, the steering shaft and the auxiliary shafts. A rotating shaft matched with the guide belt is rotationally connected to an opening in the bottom end of the main body, a glue groove is formed in the main body, a gluing wheel located above the glue groove is rotationally connected to the interior of the main body, and the gluing wheel is matched with the guide belt through a limiting shaft; and a roller matched with the guide belt is rotationally connected to the position, located behind the glue coating wheel, in the main body, and the roller is located above the glue groove. Glue is smeared on the lower surface of thermo-sensitive paper through the glue smearing wheel, the thermo-sensitive paper is rolled through the roller along with continuous operation of the thermo-sensitive paper, and therefore redundant glue on the surface of the thermo-sensitive paper is extruded out and dripped into the glue groove again, and recycling of the redundant glue is completed.

This utility model relates to a pressure vessel edge detection mechanism, including a shell, a scale plate, a DC geared motor, a battery, a push-button switch, a first spool with thermal paper wound on it, an empty second spool, a detection rod, a compression spring, an indicator block, and an indicator needle. The beneficial effects are: an indicator needle is installed on the back of the detection rod; the DC geared motor drives the second spool to rotate and wind the thermal paper, causing the thermal paper to move from the first spool to the second spool at the end of the indicator needle. The indicator needle forms a scratch on the thermal paper. If the detection rod moves, it will cause the indicator needle to move in a direction perpendicular to the direction of movement of the thermal paper, thus forming a zigzag mark on the thermal paper. Even if the inspector does not observe the scale value change due to visual fatigue, they can still observe whether there are abnormal areas on the edges of the pressure pipeline through the scratches on the thermal paper.

The application discloses a label output structure of a collection management device, and relates to the technical field of medical auxiliary equipment. The device body is internally provided with an auxiliary mechanism for processing thermal paper. The auxiliary mechanism comprises a plurality of cylinders for cutting the thermal paper. The inside of the device body comprises a label feeding mechanism for spading off the label and transporting the label to the outside of the device body. The label feeding mechanism comprises a pasting plate for spading off the label. The inclined surface of the pasting plate is used to spade into the label and the bottom paper, so as to avoid label curling or tearing caused by traditional vertical tearing. Then, the electric push rod one is retracted to realize uniform speed arc-shaped overturning, so that the label remains flat during transfer, thereby realizing the transfer of the label. The electric push rod two is pressed down to cooperate with the edge blade of the cylinder, so as to realize annular cutting. The waste paper forms an independent circular piece and is pasted to the upper right corner of the label, thereby forming a glue-free grabbing area, so as to avoid the problems of pulling deformation and sticky gloves caused by strong label adhesion.

This utility model discloses a backing-free thermal printing label paper, comprising a paper base, a heat insulation layer, a thermal color-developing layer, a silicone oil layer, a waterproof layer, and an adhesive layer. The thermal color-developing layer develops color when heated, meaning the label paper of this utility model is based on thermal paper. In use, the label paper can be directly adhered to the object, such as a package, via the adhesive layer. This utility model uses a backing-free thermal printing label paper, which, compared to traditional self-adhesive labels, avoids the waste of backing paper resources and reduces environmental pollution. Furthermore, the waterproof layer beneath the paper base effectively prevents the paper base from absorbing water, thus avoiding problems such as wrinkles.

The invention discloses a thermal paper coating uniformity dynamic evaluation method driven by deep learning, and relates to the technical field of thermal paper coating uniformity evaluation, and the method comprises the following steps: respectively obtaining images of a piece of thermal paper with a qualified coating and a piece of thermal paper with an unqualified coating, and respectively obtaining qualified coating image data and disqualified coating image data; respectively carrying out image distribution preprocessing to obtain coating distribution image data; respectively carrying out image texture preprocessing to obtain coating texture image data; establishing a coating evaluation model according to the coating distribution image data and the coating texture image data, and dynamically evaluating the coating uniformity of the thermo-sensitive paper; the method is used for solving the problems that when an existing thermal paper coating uniformity evaluation technology is used for evaluating the thermal paper coating uniformity through a gray level image, a deep learning model cannot be used for accurately identifying non-uniformity of the thermal paper coating and other hidden defects, and the thermal paper coating uniformity cannot be accurately evaluated.

The present application discloses an eco-friendly long-lasting heat-sensitive paper, including a substrate layer, a base color layer, a heat-sensitive covering layer, and a protective layer that are arranged sequentially from bottom to top, where the heat-sensitive covering layer is prepared as follows: coating a heat-sensitive covering layer raw material on the base color layer, and oven-drying a resulting product, where the heat-sensitive covering layer raw material is an emulsion obtained by mixing an acrylic hollow microsphere with a host resin. In the present application, an acrylic hollow microsphere that can change from an opaque state to a transparent state after rupturing under heat is used as a heat-sensitive covering layer to cover a base color layer to obtain the heat-sensitive paper with heat-sensitive color development characteristics.

The invention relates to the field of flux valve spraying detection, in particular to a flux spraying detection device and method. The device comprises a soldering flux cleaning mechanism used for cleaning residual soldering flux at a soldering flux valve spraying opening; the thermo-sensitive paper supply mechanism is used for supplying thermo-sensitive paper; wherein the thermo-sensitive paper is used for receiving soldering flux sprayed by the soldering flux valve at a specified position of the thermo-sensitive paper, so that soldering flux spots are formed; the machine vision detection mechanism is used for shooting the soldering flux spot picture and detecting the position and the diameter of the soldering flux spot; and the transferring mechanism is connected with the scaling powder valve so as to drive the scaling powder valve to move to a designated position. The problems of many interference factors and insufficient detection precision of the existing detection scheme can be solved.

The invention relates to the technical field of thermo-sensitive paper production and processing, in particular to a rewinding mechanism of a thermo-sensitive paper slitting machine, which comprises a slitting machine body, a rewinding frame is fixedly mounted on one side of the slitting machine body, and a tensioning assembly for tensioning thermo-sensitive paper is arranged on one side of the rewinding frame; the rotating shaft is rotationally installed on the rewinding frame, and the rotating shaft is provided with a rolling-out assembly used for preventing the thermo-sensitive paper from wrinkling and a winding assembly used for fixing the winding drum; the power assembly is located on one side of the slitting machine body and used for driving the rotating shaft to rotate; the linkage plate drives the butt joint, the extension plate and the moving plate to move in the control groove, so that the sleeve rods on the two sides of the winding roller are driven to synchronously get close to and get away from each other, winding barrels with different diameters can be fixed to the winding roller through the two sleeve rods, in the process of adjusting the distance between the sleeve rods, only a rotating handle needs to be rotated by a person, and the labor intensity of workers is reduced. And the influence on the production efficiency of the thermo-sensitive paper due to the fact that much time is occupied is avoided.

The present application relates to the technical field of production control, in particular to a kind of online coating data remote acquisition and analysis method and device of heat-sensitive paper production line.The method analyzes heat-sensitive paper image and each information in coating time on time sequence.Analyze the thickness change and shape change between adjacent time, which can effectively quantify the thickness change significance of each thickness area. Quantify the first coating unevenness at each time. Analyzing the linear correlation between the first coating unevenness and the ambient humidity can evaluate the influence of humidity in the current environment, obtain the second coating unevenness, obtain the influence weight of each parameter data on the doctor blade, and adjust the real-time parameter data based on the adjustment amount. The present application quantifies the real unevenness caused by the wear of the doctor blade by analyzing the thickness change and other characteristics in the coating process of heat-sensitive paper on time sequence in real time, combined with the influence of ambient humidity on coating thickness, and then adjusts the doctor blade parameters to avoid further wear of the doctor blade in time.

The utility model relates to the field of thermo-sensitive paper production, in particular to a drying device for thermo-sensitive paper production, which comprises a drying box, connecting openings are arranged at two ends of the drying box, a mounting plate and a connecting roller are arranged on the drying box, a thermo-sensitive paper body is mounted on the connecting roller, a second motor is mounted at the top of the drying box, and a two-way screw is mounted on the second motor. Connecting plates are connected to the two ends of the two-way screw rod, heating bases are arranged at the inner ends of the connecting plates, connecting grooves and heating cavities are formed in the heating bases, heating blocks are installed in the connecting grooves, and heaters are installed in the heating cavities; a sealing cavity is formed in the top of the drying box, the two ends of the sealing cavity are connected with the drying box through ventilation pipes, an insertion groove is formed in the sealing cavity, an insertion frame is connected into the insertion groove, and a drying plate is installed in the insertion frame; according to the thermo-sensitive paper drying device, the direction of the drying device can be effectively and conveniently adjusted, and therefore thermo-sensitive paper can be conveniently produced and processed.

The present application relates to a kind of wear-resistant heat-sensitive color development protective layer and its preparation method and application, belong to the technical field of slurry or paper pulp composition.The wear-resistant heat-sensitive color development protective layer of the present application includes mutually adhered mixed gelatin layer and pigskin gelatin layer;The mixed gelatin layer includes fish skin gelatin, pigskin gelatin and glycerol, and the pigskin gelatin layer includes pigskin gelatin and glycerol.The wear-resistant heat-sensitive color development protective layer not only has excellent wear resistance, but also has high adhesion, can be firmly attached to the surface of heat-sensitive paper, thereby significantly improving its anti-friction performance.

The utility model discloses a thermo-sensitive paper anti-counterfeit label which comprises label paper, the upper side of the label paper is coated with a thermo-sensitive coating, one side, away from the label paper, of the thermo-sensitive coating is fixedly connected with a protective film, the lower side of the label paper is coated with an adhesive layer, one side, away from the label paper, of the adhesive layer is bonded with a release film, and the release film is fixedly connected with the protective film. A plurality of first holes are formed in the vertical side wall of the label paper, the first holes are uniformly distributed in the label paper, a plurality of second holes are formed in the side wall of the left side of the label paper, the second holes are uniformly distributed in the label paper, and the first holes are communicated with the second holes. According to the anti-counterfeit label, the anti-counterfeit label cannot be completely torn off after being pasted, so that the anti-counterfeit label can be prevented from being replaced, and the anti-counterfeit effect of the anti-counterfeit label is effectively improved.

The invention provides a printing control method based on thermal printing, a thermal printer and electronic equipment. The method comprises the following steps: determining the gray level of each pixel point in a current printing point row; a specified number of target point sets are selected according to different gray scale sets, and heating states of all pixel points in each target point set form a data set; according to the color development time interval between the first color development time and the second color development time, the latch time interval between every two data sets is determined, the first color development time is the heating time needed for enabling the thermo-sensitive paper to reach the temperature for full color development, and the second color development time is the heating time needed for enabling the thermo-sensitive paper to reach the temperature for starting color development; and the data sets are sequentially sent to the printing head at the latching time interval according to a preset sending sequence, and printing is completed by the printing head in the enabling time period corresponding to the current printing point row.

The present application relates to the based on the heat conduction adjuvant two-color erasable thermal paper and preparation method thereof, relate to printing consumables technical field, two-color erasable thermal paper includes protective layer and thermal coating;The thermal coating includes red thermal coating and black thermal coating arranged from top to bottom in turn, the red thermal coating is provided with protective layer;The component of the protective layer and the red thermal coating includes heat conduction adjuvant, and the color temperature difference between the red thermal coating and the black thermal coating is greater than 20 DEG C.The heat conduction adjuvant is added to the protective layer and the thermal coating, realizes the cooperation of the protective layer and the thermal coating, the display of two colors, and the red and black superimposed color can be erased.

The utility model discloses a material guiding device for a thermo-sensitive paper cutting machine, which relates to the technical field of thermo-sensitive paper production, and is characterized by comprising a fixing frame, a material guiding roller, a limiting mechanism and a traction mechanism, the fixing frame comprises a base and two fixing seats fixedly arranged on the base, the material guiding roller is rotatably arranged between the two fixing seats, and the limiting mechanism is arranged on the material guiding roller. The limiting mechanism comprises two limiting rings slidably connected to the material guide roller in a sleeving mode, the sides, away from each other, of the two limiting rings are fixedly connected with connecting pipes, one ends of the connecting pipes are in threaded connection with connecting rods, and the connecting rods are rotationally installed on the fixing base. And a driving assembly for driving the connecting rod to rotate is arranged in the base and the fixed seat. The device has the technical effects that by arranging the limiting mechanism, when thermo-sensitive paper with different widths is guided, the thermo-sensitive paper can be transversely limited through the two limiting rings, so that the thermo-sensitive paper is prevented from transversely deviating on the material guide roller, and the subsequent cutting quality is improved.

The invention belongs to the technical field of printer equipment, and particularly relates to a self-checking method and device of a thermal printer and the thermal printer. According to the method, a test image is printed, concentration characteristic signals are extracted, the abnormal type of printing concentration is determined, and whether the content currently printed by the thermal printer is clear or not is recognized; according to the abnormal type of the printing concentration and the working environment temperature of the thermal printer, the thermal printer is driven to heat in different heating modes, so that the printing concentration of the thermal printer tends to be normal, and the problem that the printing concentration is not uniform due to different quality and different types of thermal paper is solved; the thermal printer can adapt to the environment temperature to control heating of the paper bin, and the problem that when the temperature is too low, heat energy generated by heating of a printing head is not enough to enable color change of a thermosensitive coating of paper is solved; and by opening the paper bin for heating, the inconvenience in use caused by the fact that the adhesive surface of the thermo-sensitive paper is hardened at low temperature and the thermo-sensitive paper is easily separated from the release paper during bill printing can be avoided.

The utility model discloses a thermal printer, which belongs to the technical field of thermal printers, and comprises a base, a thermal paper discharge tray, a printer main body and a mounting rack, the surface of the base is provided with the thermal paper discharge tray, one side of the surface of the base is provided with the printer main body, and the printer main body is provided with the mounting rack. Mounting frames are installed on the surface of the base and located between the printer body and the thermo-sensitive paper discharging disc, guide rollers are symmetrically installed between the mounting frames, an adjusting mechanism for adjusting the distance between the guide rollers is installed in the mounting frames, and the adjusting mechanism comprises a two-way lead screw, a moving end and a rotating end. Through the arrangement of the guide rollers and the adjusting mechanism, the distance between the two sets of guide rollers can be flexibly controlled, the guide rollers assist the thermo-sensitive paper to enter the printer in the posture parallel to the input port of the printer, friction between the thermo-sensitive paper and the input port of the printer is avoided, and the stability of the whole printer in use is guaranteed.