Abstract: A fluid ejection device includes a chamber, a first fluid channel and a second fluid channel each communicated with the chamber, a first peninsula extended along the first fluid channel and a second peninsula extended along the second fluid channel, and a first sidewall extended between the first peninsula and the chamber, and a second sidewall extended between the second peninsula and the chamber. The first sidewall is oriented at a first angle to the chamber and the second sidewall is oriented at a second angle to the chamber such that the second angle is different from the first angle.

Abstract: It has been reported that many organic sunscreens lose their efficacy on exposure to UV rays. Further some of the organic sunscreens are known to interact with each other when applied on the skin with or without exposure to UV radiation. Thus such compositions are not stable. They are not very effective in blocking the UV-rays a few minutes or hours after the product has been applied to the skin. Further when such compositions are used and then exposed to sunlight or UV rays, the period over which the skin is actually protected is very short, while the consumer is under the mistaken impression that the composition is protecting his/her skin. This false impression can lead to the consumer exposing himself/herself more to sunlight thereby getting more damage to the skin. A solution to the foregoing problem is provided by a stable sunscreen composition comprising: (a) a complex of a first organic sunscreen % with a first paramagnetic metal ion; and (b) a second organic sunscreen.

Abstract: A fluid ejection device includes a chamber, a first fluid channel and a second fluid channel each communicated with the chamber, a first peninsula extended along the first fluid channel and a second peninsula extended along the second fluid channel, and a first sidewall extended between the first peninsula and the chamber, and a second sidewall extended between the second peninsula and the chamber. The first sidewall is oriented at a first angle to the chamber and the second sidewall is oriented at a second angle to the chamber such that the second angle is different from the first angle.

Abstract: A fluid ejection device includes a chamber, a first fluid channel and a second fluid channel each communicated with the chamber, a first peninsula extended along the first fluid channel and a second peninsula extended along the second fluid channel, and a first sidewall extended between the first peninsula and the chamber, and a second sidewall extended between the second peninsula and the chamber. The first sidewall is oriented at a first angle to the chamber and the second sidewall is oriented at a second angle to the chamber such that the second angle is different from the first angle.

Abstract: The present disclosure relates to a method for printing a secure image on media using an inkjet printing device. The method includes printing an underlayer using an inkjet printing device that penetrates into a front surface of media. The underlayer is configured to define identification indicia. Included in the method is printing a secure image on top of the underlayer using an inkjet printing device. Examination of a back surface opposite the front surface allows viewing of the identification indicia for authenticating the secure image.

Abstract: A fluid ejection device includes a chamber, a first fluid channel and a second fluid channel each communicated with the chamber, a first peninsula extended along the first fluid channel and a second peninsula extended along the second fluid channel, and a first sidewall extended between the first peninsula and the chamber, and a second sidewall extended between the second peninsula and the chamber. The first sidewall is oriented at a first angle to the chamber and the second sidewall is oriented at a second angle to the chamber such that the second angle is different from the first angle.

Abstract: The present disclosure relates to a method for printing a secure image on media using an inkjet printing device. The method includes printing an underlayer using an inkjet printing device that penetrates into a front surface of media. The underlayer is configured to define identification indicia. Included in the method is printing a secure image on top of the underlayer using an inkjet printing device. Examination of a back surface opposite the front surface allows viewing of the identification indicia for authenticating the secure image.

Abstract: The present disclosure relates to a method for printing a secure image on media using an inkjet printing device. The method includes printing an underlayer using an inkjet printing device that penetrates into a front surface of media. The underlayer is configured to define identification indicia. Included in the method is printing a secure image on top of the underlayer using an inkjet printing device. Examination of a back surface opposite the front surface allows viewing of the identification indicia for authenticating the secure image.

Abstract: The present invention is an inkjet print cartridge for use in an inkjet printing apparatus for forming images on print media. The inkjet print cartridge includes an inkjet printhead that is responsive to print control signals for ejecting ink drops onto print media. The inkjet printhead has a manufacturing tolerances associated therewith producing a range of drop weights. The inkjet printhead has a corresponding drop weight from the range of drop weights. Included with the inkjet print cartridge is an information storage device that is associated with the inkjet printhead for storing information for identifying the corresponding drop weight.

Abstract: High frequency of droplet ejection with minimized crosstalk and a uniform large ink droplet weight are realized in an inkjet printer printhead which employs two ink feed channels to couple an ink firing chamber to the source of ink. A first one of the ink feed channels has a lower fluid resistance to ink flowing in the channel than a second one of the ink feed channels. The first ink feed channel and the second ink feed channel each have an inlet to the ink source and are arranged such that the inlet of the first ink feed channel is closer to the ink firing chamber than the inlet of the second ink feed channel. Furthermore, adjacent ink firing chambers are arranged such that a lower fluid resistance ink channel of one ink firing chamber is next to a higher fluid resistance ink channel of a neighboring ink firing chamber. Nozzle diameter, heater resistor, and firing chamber dimensions are also optimized for the printhead.

Abstract: An improved drop-on-demand ink jet print head is formed of a plurality of superposed metal plates that are diffusion bonded into a unit. A plurality of superposed metal plates are diffusion bonded into a unit. Punched and/or etched holes form ink passages that include manifolds that supply ink chambers through restrictors and exit orifices that supply ink to nozzles for ejection as droplets. Crosstalk among nozzles is minimized by the use of a compliant manifold plate and a relief slot in an adjacent nozzle plate so as to be coextensive with its associated manifold. The restrictors and the nozzles are substantially equal in diameter and length. The print head produces droplets up to 80 micrometers in diameter at frequencies up to 7 KHz with little variation in droplet size and velocity as a function of frequency.

Abstract: An impulse ink jet print head and method of fabricating same. The print head comprises a plurality of superposed, contiguous plates including a nozzle plate with at least a pair of nozzles for ejecting ink droplets in a direction perpendicular to a plane of the plates. Another plate is a channel plate defining at least a pair of coplanar axially aligned elongated chambers, each connected to an ink supply and having an outlet communicating with an associated nozzle. A diaphragm plate overlies the channel plate and has transducers thereon for displacing ink in each of the chambers to eject discrete ink droplets from the nozzles. Other plates may include a manifold plate for directing ink to a plurality of pairs of chambers and a restrictor plate with restictor orifices positioned between the manifold plate and each of the chambers. The method of fabricating the print head includes forming the different plates, forming the transducers, and assembling all of the components in a particular relationship.