Printing device and composition comprising magnetic-color-changeable microcapsules
AssigneeSociete BIC
InventorsSeung Hun Han, Jeongmi Ha, Jin Sung Cha, Woo Yong Jung, Jiyoung Ryu, Jae Hyun Joo
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Abstract
This disclosure relates to a printing device for printing or dispensing a curable printing composition which is capable of changing color in response to the application of a magnetic field in the non-cured state. The printing device may be a handheld device such as a portable pen. The present disclosure further relates to curable compositions, cartridges and methods which may be used in combination with the aforementioned printing devices or in other applications.
Claims19
A device for printing a composition onto a printable medium comprising:
- a cartridge including the composition comprising:
- magnetic-color-changeable microcapsules, wherein the magnetic-color-changeable microcapsules are microcapsules including a curable solvent in which electrically charged particles are dispersed, wherein spacing between the particles is controllable by application of a magnetic field, and wherein the particles reflect a wavelength of light that varies depending on a change in the spacing, wherein the curable solvent includes a resin curable by application of energy, the resin having a weight average molecular weight of about 100 to about 800, and
- wherein the curable solvent has a viscosity of about 5 to about 50 cps measured at 25° C.;
- an ejection unit for ejecting the composition from the cartridge;
- a magnetic field generation unit for applying a magnetic field to the composition ejected from the ejection unit;
- and
- an energy regulation unit for generating and/or blocking energy for curing the composition ejected from the ejection unit, wherein the energy generated from the energy regulation unit is any one selected from among thermal energy, light energy, and chemical energy, and
- wherein the printing device is a handheld writing device.
A composition for printing onto a printable medium comprising magnetic-color-changeable microcapsules, wherein the magnetic-color-changeable microcapsules is a microcapsule including a curable solvent in which electrically charged particles are dispersed, wherein the particles have a spacing therebetween controllable by application of a magnet field, and wherein the particles reflect a wavelength of light that varies depending on a change in the spacing, the curable solvent includes a resin curable by application of energy, the energy being any one selected from among thermal energy, light energy, and chemical energy, the resin has a weight average molecular weight of about 100 to about 800, and the curable solvent has a viscosity of about 5 to about 50 cps measured at 25° C.
Dependencies are inferred from the claim text.