# US 10,308,009 B2 · Magnetic media holder for printer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,308,009 B2 - Document ID: US10308009B2 - Status: Granted - Kind: B2 - Application number: 15/978,351 - Filed: 2018-05-14 - Published: 2018-09-20 - Granted: 2019-06-04 - Earliest claimed: 2015-10-13 - Assignees: Intermec IP Corp. - Applicants: Intermec Technologies Corporation - Inventors: Wai Kit Ho; Harry Nicholas Makabali Lansangan; Ling Siong Chwa - Web page: https://patentgrep.com/patent/US10308009B2 ## CPC - B41F 21/04: Grippers ({B41F21/08, B41F21/10} B41F21/12, B41F21/14 take precedence) - B41J 15/00: Devices or arrangements {of selective printing mechanisms, e.g. ink-jet printers or thermal printers,} specially adapted for supporting or handling copy material in continuous form, e.g. webs - B41J 15/02: Web rolls or spindles; Attaching webs to cores or spindles - B41J 15/042: {for loading rolled-up continuous copy material into printers, e.g. for replacing a used-up paper roll; Point-of-sale printers with openable casings allowing access to the rolled-up continuous copy material} - B65H 2405/40: Holders, supports for rolls - B41F: PRINTING MACHINES OR PRESSES (manifolding devices or office printing machines B41L) - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES ## Abstract A print media holder device has first and second grip members. Permanent magnets are attached to the first and second grip members. An electromagnet is disposed between the first and second grip members, where when the electromagnet is selectively energized the permanent magnets attached to the first and second grip members are repelled in a manner that increases the outer dimension of the print media holder device to grip a media core. ## Claims ### Claim 1 A print media holder device, comprising: a first grip member; at least one permanent magnet attached to the first grip member; a second grip member; and an electromagnet disposed between the first and second grip members, wherein, when the electromagnet is selectively energized, the permanent magnet attached to the first grip member is attracted or repelled in a manner that reduces or increase an outer dimension of the print media holder device. ### Claim 2 (depends on 1) The device according to claim 1, wherein the first grip member terminates at an outermost point with one or more grip edges that are configured to grip the media core. ### Claim 3 (depends on 2) The device according to claim 2, wherein the second grip member terminates at an outermost point with one or more grip edges that are configured to grip the media core. ### Claim 4 (depends on 1) The device according to claim 1, wherein the electromagnet is selectively energized with a specified current to establish a specified attractive force. ### Claim 5 (depends on 1) The device according to claim 1, wherein the print media holder device resides within a printer. ### Claim 6 (depends on 1) The device according to claim 1, wherein the print media holder device having an outer dimension that is defined as a distance from an outermost portion of the first grip member to an outermost portion of the second grip member. ### Claim 7 A print media holder device, comprising: a first grip member having a first grip edge; a first grip member magnet attached to the first grip member; a second grip member having a second grip edge; and a second magnet disposed between the first and second grip edges; wherein at least one of the second magnet and the grip member magnet comprises an electromagnet that is selectively energized in a manner that generates attractive forces or repulsive forces between the grip member magnet and the second magnet such that the first grip edge is pushed inward or outward by magnetic force in a manner that reduces or increases an outer dimension of the print media holder device. ### Claim 8 (depends on 7) The device according to claim 7, wherein the first grip member magnet comprises a permanent magnet, and wherein the second magnet comprises an electromagnet. ### Claim 9 (depends on 7) The device according to claim 7, wherein the first grip member magnet comprises an electromagnet, and wherein the second magnet comprises a permanent magnet. ### Claim 10 (depends on 7) The device according to claim 7, further comprising a second grip member magnet attached to the second grip member. ### Claim 11 (depends on 10) The device according to claim 10, wherein the first and second grip member magnets comprise a permanent magnet, and wherein the second magnet comprises an electromagnet. ### Claim 12 (depends on 10) The device according to claim 10, wherein the first and second grip member magnets comprise an electromagnet, and wherein the second magnet comprises a permanent magnet. ### Claim 13 (depends on 7) The device according to claim 7, wherein the electromagnet is selectively energized with a specified current to establish a specified attractive force. ### Claim 14 (depends on 7) The device according to claim 7, wherein the print media holder device resides within a printer. ### Claim 15 (depends on 7) The device according to claim 7, wherein the print media holder device having an outer dimension that is defined as a distance from an outermost portion of the first grip member to an outermost portion of the second grip member. ### Claim 16 A print media holder device, comprising: a plurality of grip members, each having a grip edge; a plurality of grip member magnets attached to one of the grip member; the print media holder device having an outer diameter that is defined as distance from an outermost portion of a first grip member edge; and a plurality of central magnets disposed at a central location with respect to the plurality of grip members; wherein at least one of the central magnets and the grip member magnets comprises an electromagnet that is selectively energized in a manner that generates repelling or attractive forces between the grip member magnets and the central magnets such that the first grip member edge is pushed outward or inward by magnetic force in a manner that increases or decreases the outer diameter of the print media holder device to grip a media core. ### Claim 17 (depends on 16) The device according to claim 16, wherein the grip member magnets comprise permanent magnets, and wherein the central magnets comprise electromagnets. ### Claim 18 (depends on 16) The device according to claim 16, wherein the grip member magnets comprise electromagnets, and wherein the central magnets comprise permanent magnets. ### Claim 19 (depends on 16) The device according to claim 16, wherein the electromagnet is selectively energized with a specified current to establish a specified repelling or attractive force. ### Claim 20 (depends on 16) The device according to claim 16, wherein the print media holder device resides within a printer. ### Claim 21 (depends on 16) The device according to claim 16, wherein the repelling forces are automatically adjusted using current provided to the electromagnets to maintain contact with inner side of the media core based upon the size of the inner diameter of the media core.