公开(公告)号：US20210064312A1

公开(公告)日：2021-03-04

申请号：US16962271

申请日：2018-01-30

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Bartley Mark HIRST ,  James Michael MAGDICH ,  Paul L. JERAN

IPC: G06F3/12 ,  G06F21/60 ,  H04L9/08

Abstract: An example replaceable printer component includes a communication engine. The communication engine indicates to a host an operation to be performed by the host. The replaceable printer component also includes a sensor engine to measure a property affected by the operation. The replaceable printer component includes a verification engine to determine whether the host performed the operation based on the measurement of the property.

公开(公告)号：US20210060963A1

公开(公告)日：2021-03-04

申请号：US16644607

申请日：2017-10-18

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Paul JERAN ,  Bartley Mark HIRST ,  Jefferson P WARD ,  Dee CHOU

IPC: B41J2/175

Abstract: In one example, an article for a replaceable printer component includes an integrated circuit device having a device controller, a conductor to supply power to the device controller and to carry a signal to and from the device controller, and a sensor operatively connected to the device controller to sense a voltage and/or a frequency on the conductor. The device controller to send an indication of a sensed voltage and/or a sensed frequency to the printer controller.

公开(公告)号：US20200081383A1

公开(公告)日：2020-03-12

申请号：US16462712

申请日：2017-01-25

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Bartley Mark HIRST ,  Mark SHAW ,  Jan ALLEBACH ,  Steven PEKAREK ,  Xiang ZHANG

IPC: G03G15/00 ,  G03G15/20

Abstract: In one example in accordance with the present disclosure, a method for determining media weight is described. According to the method, an energy used by a fusing system over a time interval is calculated and a number of pages processed by the fusing system during that time interval is determined. A fusing energy per processed page is then determined based on the energy used by the fusing system and the number of pages processed by the fusing system during the time interval. A media weight is then determined based on the fusing energy per processed page.

公开(公告)号：US20220335167A1

公开(公告)日：2022-10-20

申请号：US17640788

申请日：2019-10-28

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Bartley Mark HIRST ,  Charles LOGAN ,  Cody RAVENSCROFT

IPC: G06F21/85 ,  G06F21/55

Abstract: In various examples, detecting unauthorized attachment to a communication bus between first and second components according to the present disclosure may include: applying voltage to the communication bus between the first and second components; detecting, at the first or second component, a temporal response to the applied voltage; comparing the detected temporal response to a reference temporal response associated with the communication bus; and based on the comparing, detecting the unauthorized attachment to the communication bus.

公开(公告)号：US20200282735A1

公开(公告)日：2020-09-10

申请号：US16604890

申请日：2017-05-21

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Paul JERAN ,  Bartley Mark HIRST ,  Dee CHOU

IPC: B41J2/175

Abstract: In one example, an integrated circuit device for a replaceable printer component to communicate information about the component to a printer controller when a component with the integrated circuit device is installed in a printer. The integrated circuit device includes a controller, a memory operatively connected to the controller to store and/or generate information about the component, a single pair of conductors to supply power to the controller and to carry data signals to and from the controller, a detector to detect incoming data signals with a signal property associated with the component, and two electrical contacts each connected to one of the conductors to connect the integrated circuit device to a printer controller when a component with the integrated circuit device is installed in a printer.