# US 11,440,696 B2 · Fastener-free packaging > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,696 B2 - Document ID: US11440696B2 - Status: Granted - Kind: B2 - Application number: 17/019,440 - Filed: 2020-09-14 - Published: 2020-12-31 - Granted: 2022-09-13 - Earliest claimed: 2018-03-01 - Assignees: Pratt Corrugated Holdings, Inc. - Applicants: Pratt Corrugated Holdings, Inc. - Inventors: John Richard Muse; Shifeng Chen - Web page: https://patentgrep.com/patent/US11440696B2 ## CPC - B65D 5/10: with end closures formed by inward-folding of self-locking flaps hinged to tubular body - B65D 5/106: {the opening being a slot} - B65D 5/4212: {Information or decoration elements, e.g. content indicators, or for mailing (B65D5/522 takes precedence)} - B65D 5/4608: {Handgrip holes} - B31B 50/26: Folding sheets, blanks or webs - B31B 2100/00: Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs - B31B 2110/35: rectangular, e.g. square - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES - B31B: MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making wound articles, e.g. wound tubes, B31C; combined making and filling B65B) ## Abstract Fastener-free packaging includes a plurality of main panels, each main panel comprising an upper panel, a central panel, and a lower panel; at least one attaching connection feature located on at least one lower panel; and at least one receiving connection feature located on at least one lower panel, wherein each lower panel is connected to at least two other lower panels by an attaching connection feature connecting to a receiving connection feature such that all lower panels are connected together thereby forming a bottom. ## Claims ### Claim 1 A blank for forming packaging, the blank comprising: a first main panel; a second main panel connected to the first main panel; a third main panel connected to the second main panel; a fourth main panel connected to the third main panel; and a connection panel connected to the fourth main panel, each main panel further comprising at least one upper panel, at least one central panel, and at least one lower panel, wherein at least one upper panel comprises an attaching connection feature, wherein at least one lower panel comprises an attaching connection feature, wherein at least one upper panel comprises a receiving connection feature, wherein at least one lower panel comprises a receiving connection feature, wherein at least one attaching connection feature comprises a connecting tab and wherein at least one receiving connection feature comprises a connection aperture, wherein the connection aperture is defined in the panel containing the receiving connection feature, wherein each connection aperture comprises a slim portion and an expanded portion, wherein the connection aperture defines a first lateral end, a second lateral end, a first vertical end, and a second vertical end, wherein the slim portion defines a width, and wherein the expanded portion defines a width larger than the width of the slim portion, wherein one upper panel comprises two connecting tabs and a support tab located between the connecting tabs, and wherein a recess is defined between each of the connecting tabs and the support tab. ### Claim 2 (depends on 1) The blank of claim 1, wherein each of the connecting tabs and the support tab define chamfers at outer ends of the tabs. ### Claim 3 (depends on 2) The blank of claim 2, wherein each chamfer is arranged at an angle of greater than 45° relative to the outer ends of the tabs. ### Claim 4 (depends on 1) The blank of claim 1, wherein each recess between each of the connecting tabs and the support tab is defined by sides of the connecting tabs and support tab, and wherein the sides of the connecting tab are angled with respect to the nearest side of the support tab. ### Claim 5 (depends on 4) The blank of claim 4, wherein the sides of the connecting tab are angled at about 30° with respect to the nearest side of the support tab. ### Claim 6 (depends on 1) The blank of claim 1, wherein the recess is terminated by a radius. ### Claim 7 (depends on 1) The blank of claim 1, wherein each connecting tab is of a width and the support tab is of a width, wherein the width of each connecting tab is less than the width of the support tab. ### Claim 8 (depends on 7) The blank of claim 7, wherein the width of each connecting tab is between 70% to 80% of the width of the support tab. ### Claim 9 (depends on 8) The blank of claim 8, wherein the width of each connecting tab is about 75% of the width of the support tab. ### Claim 10 (depends on 1) The blank of claim 1, wherein the expanded portion is defined by an angled portion of one of the first lateral end and the second lateral end. ### Claim 11 (depends on 1) The blank of claim 1, wherein the expanded portion is defined proximate one of the first vertical end and the second vertical end, wherein the expanded portion further defines a notch proximate one of the first lateral end and the second lateral end. ### Claim 12 (depends on 1) The blank of claim 1, wherein the expanded portion defines an angled portion and a notch, wherein the notch terminates at the second lateral end. ### Claim 13 A fastener-free box formed from a blank, the box comprising: a plurality of main panels, each main panel comprising an upper panel, a central panel, and a lower panel; at least one attaching connection feature located on at least one lower panel; and at least one receiving connection feature located on at least one lower panel, wherein each lower panel is connected to at least two other lower panels by an attaching connection feature connecting to a receiving connection feature such that all lower panels are connected together thereby forming a bottom, wherein each attaching connection feature comprises a connecting tab and wherein each receiving connection feature comprises a connection aperture, wherein the connection aperture is defined in the panel containing the receiving connection feature, wherein the connection aperture defines a first lateral end, a second lateral end, wherein each connection aperture comprises a slim portion and an expanded portion, wherein the expanded portion is defined by an angled portion of one of the first lateral end and the second lateral end, wherein the slim portion defines a width, and wherein the expanded portion defines a width larger than the width of the slim portion, wherein each connecting tab is inserted into one connection aperture, wherein one upper panel comprises two connecting tabs and a support tab located between the connecting tabs, and wherein a recess is defined between each of the connecting tabs and the support tab. ### Claim 14 (depends on 13) The box of claim 13, wherein each of the connecting tabs and the support tab define chamfers at outer ends of the tabs. ### Claim 15 (depends on 14) The box of claim 14, wherein the connection aperture further defines a first vertical end and a second vertical end. ### Claim 16 (depends on 13) The box of claim 13, wherein each recess between each of the connecting tabs and the support tab is defined by sides of the connecting tabs and support tab, and wherein the sides of the connecting tab are angled with respect to the nearest side of the support tab. ### Claim 17 (depends on 13) The box of claim 13, wherein the recess is terminated by a radius. ### Claim 18 A method of forming a box from a blank, the method comprising the steps of: obtaining a pre-assembled, flattened blank, the pre-assembled blank comprising: a first main panel; a second main panel connected to the first main panel; a third main panel connected to the second main panel; a fourth main panel connected to the third main panel; and a connection panel connected to the fourth main panel, the connection panel being adhered to the first main panel; each main panel further comprising at least one upper panel, at least one central panel, and at least one lower panel, wherein at least one upper panel comprises an attaching connection feature, wherein at least one lower panel comprises an attaching connection feature, wherein at least one upper panel comprises a receiving connection feature, wherein at least one lower panel comprises a receiving connection feature, wherein at least one attaching connection feature comprises a connecting tab and wherein at least one receiving connection feature comprises a connection aperture, wherein the connection aperture is defined in the panel containing the receiving connection feature, wherein the connection aperture defines a first lateral end, a second lateral end, wherein each connection aperture comprises a slim portion and an expanded portion, wherein the expanded portion is defined by an angled portion of one of the first lateral end and the second lateral end, wherein the slim portion defines a width, and wherein the expanded portion defines a width larger than the width of the slim portion, wherein one upper panel comprises two connecting tabs and a support tab located between the connecting tabs, and wherein a recess is defined between each of the connecting tabs and the support tab; expanding the pre-assembled blank to form an expanded structure; forming a bottom of the box, the step of forming the bottom of the box comprising the steps of: arranging each lower panel comprising the receiving connection feature in arrangement covering a bottom end of the expanded structure, arranging each lower panel comprising the attaching connection feature to connect to one receiving connection feature of each of the lower panels comprising the receiving connection feature, and connecting each attaching connection feature to at least one receiving connection feature; and forming a top of the box, the step of forming the top of the box comprising the steps of: arranging each upper panel comprising the receiving connection feature in arrangement covering a top end of the expanded structure, arranging each upper panel comprising the attaching connection feature to connect to one receiving connection feature of each of the upper panels comprising the receiving connection feature, and connecting each attaching connection feature to at least one receiving connection feature. ### Claim 19 (depends on 18) The method of claim 18, wherein the step of connecting each attaching connection feature to at least one receiving connection feature comprises the steps of inserting at least one connection tab of the attaching connection feature into a connection aperture of the receiving connection feature. ### Claim 20 (depends on 18) The method of claim 18, wherein the connection aperture further defines a first vertical end and a second vertical end.