Abstract:
Liquid detection devices and perspiration-activated materials powered by liquid-activated hydrogel batteries are disclosed. A liquid detection device and a perspiration-activated material may be powered by a liquid-activated hydrogel battery comprising hydrogel permeated with electrolyte and an anode and a cathode in contact with the hydrogel. The hydrogel may become hydrated responsive to contact with a liquid, supporting ionic communication between the anode and the cathode via the electrolyte. The ionic communication may generate a voltage operative to power the liquid detection device or the perspiration-activated material connected thereto. The liquid detection device may operate to detect a liquid in contact therewith when powered by the hydrated liquid-activated hydrogel battery and to generate a detection event responsive to detecting the liquid. The perspiration-activated material may operate to evaporate and to eliminate odor associated with perspiration in contact therewith.
Abstract:
Printing apparatuses for detection of substrate alignment, methods for manufacture and use thereof, and substrates are disclosed. One printing apparatus may include a printing assembly having at least one conductive alignment sensor with a plurality of inductive coils configured to generate an electromagnetic field. The printing assembly may receive at least one substrate having at least one conductive portion and align the substrate such that the plurality of inductive coils and the conductive portion substantially overlap with each other to form an electromagnetic field having a direction from the at least one conductive alignment sensor to the at least one conductive portion. The direction of the electromagnetic field with respect to the conductive alignment sensor may form an angle. The conductive alignment sensor may be configured to detect a movement of the conductive portion when a change to the angle causes a current change through the plurality of inductive coils.