摘要:
A method and apparatus is disclosed which employs a pulse-controlled microdroplet fluid delivery system for precisely dispensing fragrances and other odor producing vapors. The pulse-controlled fluid delivery device is capable of ejecting microdroplets of fluid with a diameter less than 350 micrometers at a controlled ejection rate based upon inkjet printing technology. The pulse-controlled fluid delivery system includes mechanisms for vaporizing the fluids and delivery of the vapors to the nose, which is controlled by a programmable system controller capable of real time data-driven dispensing with a multi-fluid capability. Synthesis of custom fragrances is made possible by a multijet programmed control system which adjusts dispensing rates of components. Calibration of a prior art “electronic nose” is disclosed. A precise calibration gas is produced in real-time to counteract the effect of drifting.
摘要:
A method for making a laminated carrier film for use in releasing interstitial fluid from skin for collection or measurement includes providing a printhead having an orifice and a reservoir containing a meltable absorber substance, the printhead being capable in response to electrical signals, to eject droplets of said meltable absorber substance from the orifice; supporting a carrier film having a series of spaced apart openings for a meltable absorber substance on a support base, in close proximity to the printhead, whereby the spaced apart openings on the carrier film can be positioned relative to the orifice to receive absorber substance droplets ejected from the printhead; filling the spaced apart openings of the carrier film with meltable absorber substance ejected from the printhead; and covering the carrier film on one side with a clear polymer film strip selected to allow laser energy to pass through the clear polymer film in order to reach the meltable absorber substance inside the openings.
摘要:
A method and apparatus is disclosed which employs a pulse-controlled microdroplet fluid delivery system for precisely dispensing fragrances and other odor producing vapors. The pulse-controlled fluid delivery device is capable of ejecting microdroplets of fluid with a diameter less than 350 micrometers at a controlled ejection rate based upon ink-jet printing technology. The pulse-controlled fluid delivery system includes mechanisms for vaporizing the fluids and delivery of the vapors to the nose, which is controlled by a programmable system controller capable of real time data-driven dispensing with a multi-fluid capability. Synthesis of custom fragrances is made possible by a multijet programmed control system which adjusts dispensing rates of components. Calibration of a prior art “electronic nose” is disclosed. A precise calibration gas is produced in real-time to counteract the effect of drifting.
摘要:
A more reliable and precise method of determining the olfactory threshold is provided by a digitally operated apparatus that dispenses controlled amounts of a volatile test fluid from a digital jetting device of the type used for ink jet printing. A precise number and size of micro droplets are dispensed onto a heater which vaporizes the fluid at a test location where a patient can sniff and report whether the odor is sensed. Incremental adjustments are made to determine the approximate threshold of olfactory perception of the odor. Sensors are included to verify dispensing and to coordinate dispensing with breathing.
摘要:
A carrier film has one or more openings or wells loaded with a meltable absorbing substance for absorbing laser energy. The carrier film has a clear film which covers one side of the opening containing the absorber substance and the open side of the opening in the carrier film is positioned adjacent to the skin and irradiated through the clear cover film by a laser beam. The melted laser energy absorbing substance is ejected to form a spot laying on the skin. After moving the carrier film, a laser beam impinges the spot thereby raising a tiny blister on the skin containing interstitial fluid. The interstitial fluid is collected for diagnosis and analysis. A method of making and loading the carrier film with a digitally operated dispenser of the type used for ink jet printing is disclosed. Special construction of the opening appears to enhance ejection.
摘要:
Arrays of electro-mechanical dispensers are used to form extremely small drops of fluid and locate them precisely on substrate surfaces in miniature arrays. The printed arrays may consist of DNA, immunoassay reagents or the like. A positioning support such as an X-Y table moves the dispensing devices and substrate surfaces relative to each other to locate the drops on the substrates in predetermined patterns. Arrays of probes as dense as one thousand per square centimeter with center-to-center spacing as small as twenty-five micrometers are formed.
摘要:
Method for manufacturing a sidewall actuatable, high density channel array for an ink jet printhead. A first surface of a main body portion formed from an inactive material is conductively bonded to a first surface of a first intermediate body portion formed from an active material. A plurality of parallel grooves are then machined through the first intermediate body portion and part of the main body portion to form a plurality of channels separated by a corresponding plurality of sidewall actuators comprised of a first sidewall section formed from an inactive material and a second sidewall section formed from an active material. A top body portion is then conductively mounted to the intermediate body portion.
摘要:
An ink jet printhead includes of a lower body part having a base section and a plurality of generally parallel spaced projections extending upwardly therefrom and an upper body part having a top section and a corresponding plurality of generally parallel spaced projections extending downwardly therefrom. The top sides of the lower body projections are conductively mounted to the bottom sides of the upper body projections to form sidewalls which define a plurality of ink-carrying channels. Strips of a conductive adhesive mount the lower and upper body projections together and a controller is electrically connected to the strips to selectively impart either a positive, zero, or negative voltage to each strip. The lower body part is formed using a piezoelectric material poled in a first direction generally perpendicular to the channels and the upper body part is formed using a piezoelectric material also poled in the first direction. By applying a positive voltage to a first strip of conductive adhesive and a negative voltage to an adjacent strip of conductive adhesive, first and second electric fields oppositely orientated to each other and normal to the direction of poling are produced in the lower and upper body projections which form first and second sidewalls for the channel, thereby causing the first and second sidewalls to deform in first and second channel expanding directions, respectively.
摘要:
A spot size modulatable, drop-on-demand type ink jet printhead and associated methods for ejecting volume modulatable droplets of ink therefrom. The ink jet printhead includes a main body portion having first and second ink carrying channels longitudinally extending therethrough and a cover plate fixedly mounted thereto. Formed in the cover plate is a tapered orifice which extends from first and second openings along a back side surface to a third opening along a front side surface thereof. The cover plate is mounted to the main body portion such that the first opening is in communication with the first ink carrying channel and the second opening is in communication with the second ink carrying channel. The ink jet printhead further includes first and second actuators coupled with the first and second ink carrying channels, respectively. Volume modulatable droplets of ink may be ejected from the ink jet printhead by simultaneously applying a voltage pulse having a selected magnitude to the first ink carrying channel and a voltage pulse having a magnitude ranging between zero and the selected magnitude to the second ink carrying channel. Alternately, volume modulatable droplets of ink may be ejected from the ink jet printhead by sequentially applying a voltage pulse having a selected time duration to the first ink carrying channel and a voltage pulse having a time duration ranging between zero and the selected time duration to the second ink carrying channel.
摘要:
Method for manufacturing a sidewall actuatable, high density channel array for an ink jet printhead. A first surface of a main body portion formed from an active material is conductively bonded to a first surface of a first intermediate body portion formed from an active material. A plurality of parallel grooves are then machined through the first intermediate body portion and part of the main body portion to form a plurality of channels separated by a corresponding plurality of sidewall actuators comprised of a first sidewall section formed from an active material and a second sidewall section formed from an active material. A top body portion is then conductively mounted to the intermediate body portion.