Patent ID: 11951748
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A key pen for a print liquid supply interface structure, the key pen comprising:
a base portion; and
a longitudinal key pen portion, the longitudinal key pen portion protruding from the base portion up to at least one actuating surface area that extends at a distance of at least 20 mm from the base portion, along a longitudinal pen axis,
wherein the base portion comprises a plurality of datums provided at regular positions around a circle having a mid-point on the longitudinal pen axis; and
wherein the plurality of datums facilitate positioning of the key pen in a predetermined rotational position around the longitudinal pen axis with respect to the print liquid supply interface structure.