US 12,214,396 B2
Seam forming apparatus for elbow duct
Sung Keun Noh, Suwon-si (KR); Ok Tae Kim, Yongin-si (KR); and Dong Woo Kang, Hwaseong-si (KR)
Assigned to Sung Keun Noh, Yongin-si (KR); and Ok Tae Kim, Yongin-si (KR)
Appl. No. 18/013,284
Filed by Sung Keun Noh, Suwon-si (KR); and Ok Tae Kim, Yongin-si (KR)
PCT Filed Apr. 15, 2021, PCT No. PCT/KR2021/004737
§ 371(c)(1), (2) Date Dec. 28, 2022,
PCT Pub. No. WO2022/025389, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 10-2020-0093136 (KR), filed on Jul. 27, 2020.
Prior Publication US 2023/0249238 A1, Aug. 10, 2023
Int. Cl. B21C 37/10 (2006.01); B21D 19/04 (2006.01); B21D 39/04 (2006.01)
CPC B21C 37/101 (2013.01) [B21C 37/104 (2013.01); B21D 19/046 (2013.01); B21D 39/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A device for forming seam of elbow duct, that molds a lockseam by bending a flange of one pair of adjacent unit members among a plurality of unit members constituting the elbow duct, wherein the device comprises:
a base that supports a lower portion of the one pair of unit members;
an elevating part that moves the base up and down;
an angle adjustment part that adjusts a supporting angle of the base;
a fixing chuck that supports an inner circumferential surface of a connecting portion of the one pair of unit members;
a rotating part that rotates the fixing chuck; and
a forming part that bends the flange of the one pair of unit members in a state where the flange is in contact to each other, to form the seam.