# US 11,897,720 B2 · Filament spool dry box > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,720 B2 - Document ID: US11897720B2 - Status: Granted - Kind: B2 - Application number: 17/341,403 - Filed: 2021-06-08 - Published: 2022-12-08 - Granted: 2024-02-13 - Earliest claimed: 2021-06-08 - Applicants: Chung-Wu Ting - Inventors: Chung-Wu Ting - Web page: https://patentgrep.com/patent/US11897720B2 ## CPC - B65H 49/322: {Enclosing boxes with supporting means for the package or reel during unwinding} - B29C 64/118: using filamentary material being melted, e.g. fused deposition modelling [FDM] - B29C 64/255: Enclosures for the building material, e.g. powder containers - B22F 2999/00: Aspects linked to processes or compositions used in powder metallurgy - B29C 64/307: Handling of material to be used in additive manufacturing - B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor - B33Y 40/00: Auxiliary operations or equipment, e.g. for material handling - B33Y 40/10: Pre-treatment - B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING ## Abstract A filament spool dry box includes a shell, a dehumidifier and a sleeve component. The shell includes a hanging structure configured to allow a bracket to be disposed in for hanging the shell. The dehumidifier is disposed inside the shell. The sleeve component is rotatably disposed inside the shell and configured to allow a filament to be disposed on. A central axis of the hanging structure is offset from and above a central axis of the sleeve component. The filament spool dry box can isolate the filament from an external environment outside the shell and remove moisture from an internal environment inside the shell by the dehumidifier. Therefore, the filament spool dry box can prevent the filament inside the shell from absorbing moisture. Furthermore, the filament spool dry box can replace disposable spools in the prior art and be energy saving and environmental protecting. ## Claims ### Claim 1 A filament spool dry box comprising: a shell comprising a hanging structure configured to allow a bracket to be disposed in for hanging the shell, wherein the shell further comprises a first shell portion and a second shell portion detachably combined together, the first shell portion comprises a first shell body and a first inner combining portion protruding from an inner periphery of the first shell body, the second shell portion comprises a second shell body and a second inner combining portion protruding from an inner periphery of the second shell body, and the first inner combining portion and the second inner combining portion cooperatively form the hanging structure; a dehumidifier disposed inside the shell; and a sleeve component rotatably disposed inside the shell and configured to allow a filament to be disposed on, a central axis of the hanging structure being offset from a central axis of the sleeve component. ### Claim 2 (depends on 1) The filament spool dry box of claim 1, wherein the hanging structure comprises an upper guiding portion for cooperating with an upper arc-shaped portion of the sleeve component to guide a movement of the sleeve component. ### Claim 3 (depends on 1) The filament spool dry box of claim 1, wherein the first inner combining portion is combined with the second inner combining portion in a sealing manner when the first shell portion is combined with the second shell portion. ### Claim 4 (depends on 2) The filament spool dry box of claim 2, further comprising at least one bearing component rotatably disposed inside the shell and for rotatably supporting the upper arc-shaped portion of the sleeve component. ### Claim 5 (depends on 4) The filament spool dry box of claim 4, wherein a cross section of the at least one bearing component is an internally tangent circle of a cross section of the sleeve component. ### Claim 6 (depends on 1) The filament spool dry box of claim 1, wherein the shell further comprises a guiding structure, the guiding structure comprises a lower guiding portion for cooperating with a lower arc-shaped portion of the sleeve component to guide a movement of the sleeve component. ### Claim 7 (depends on 6) The filament spool dry box of claim 6, wherein the first shell portion further comprises a first supporting portion protruding from the first shell body and located adjacent to the first inner combining portion, the second shell portion further comprises a second supporting portion protruding from the second shell body and located adjacent to the second inner combining portion, the first supporting portion and the second supporting portion cooperatively form the guiding structure, and the first inner combining portion is combined with the second inner combining portion in a sealing manner when the first shell portion is combined with the second shell portion. ### Claim 8 (depends on 7) The filament spool dry box of claim 7, wherein the first supporting portion is not completely attached with the second supporting portion when the first shell portion is combined with the second shell portion. ### Claim 9 (depends on 6) The filament spool dry box of claim 6, further comprising at least one bearing component rotatably disposed inside the shell and for rotatably supporting an upper arc-shaped portion of the sleeve component. ### Claim 10 (depends on 9) The filament spool dry box of claim 9, wherein a cross section of the at least one bearing component is an internally tangent circle of a cross section of the sleeve component. ### Claim 11 (depends on 6) The filament spool dry box of claim 6, wherein the dehumidifier is disposed on the guiding structure. ### Claim 12 (depends on 1) The filament spool dry box of claim 1, further comprising at least one bearing component rotatably disposed inside the shell and for rotatably supporting an upper arc-shaped portion of the sleeve component. ### Claim 13 (depends on 12) The filament spool dry box of claim 12, wherein a cross section of the at least one bearing component is an internally tangent circle of a cross section of the sleeve component. ### Claim 14 (depends on 1) The filament spool dry box of claim 1, further comprising a sealing assembly disposed between the first shell portion and the second shell portion. ### Claim 15 (depends on 14) The filament spool dry box of claim 14, wherein the sealing assembly comprises an inner sealing component and an outer sealing component, the first shell portion further comprises a first outer combining portion, the second shell portion further comprises a second outer combining portion, the inner sealing component is disposed between the first inner combining portion and the second inner combining portion, and the outer sealing component is disposed between the first outer combining portion and the second outer combining portion. ### Claim 16 (depends on 15) The filament spool dry box of claim 15, wherein the shell further comprises at least one discharge port, the outer sealing component comprises at least one through hole structure disposed in the at least one discharge port and configured to allow the filament to pass through. ### Claim 17 (depends on 16) The filament spool dry box of claim 16, further comprising at least one insert disposed in the at least one through hole structure for reducing friction acting on the filament. ### Claim 18 (depends on 1) The filament spool dry box of claim 1, further comprising at least one engaging component, and the at least one engaging component being configured to engage with the first shell portion and the second shell portion. ### Claim 19 (depends on 18) The filament spool dry box of claim 18, wherein the first shell portion further comprises a first outer combining portion protruding from an outer periphery of the first shell body, a combining surface of the first inner combining portion protrudes more than a combining surface of the first outer combining portion, the second shell portion further comprises a second outer combining portion protruding from an outer periphery of the second shell body, a combining surface of the second inner combining portion protrudes more than a combining surface of the second outer combining portion, the at least one engaging component is configured to engage with the first outer combining portion and the second outer combining portion, and the first shell portion and the second shell portion are deformed by the at least one engaging component to generate a resilient force to drive the first inner combining portion and the second inner combining portion to be combined with each other. ### Claim 20 (depends on 1) The filament spool dry box of claim 1, further comprising at least one release film disposed on at least one inner wall of the shell for reducing friction acting on the filament and/or the sleeve component.