US 11,731,808 B2
Environment-friendly paper protective bag manufacturing apparatus
Jinwei Yan, Shenzhen (CN)
Assigned to BETA (SHENZHEN) PACKAGE PRODUCTS CO., LTD, Shenzhen (CN); and HUIZHOU BETA PACKTECH CO., LTD, Huizhou (CN)
Filed by Beta (Shenzhen) Package Products Co., Ltd, Shenzhen (CN)
Filed on Apr. 6, 2021, as Appl. No. 17/223,029.
Application 16/878,645 is a division of application No. 16/795,554, filed on Feb. 19, 2020, granted, now 10,850,891, issued on Dec. 1, 2020.
Application 17/223,029 is a continuation in part of application No. 16/878,645, filed on May 20, 2020.
Application 16/795,554 is a continuation in part of application No. PCT/CN2019/121161, filed on Nov. 27, 2019.
Application PCT/CN2019/121161 is a continuation in part of application No. PCT/CN2019/110740, filed on Oct. 12, 2019.
Application PCT/CN2019/110740 is a continuation in part of application No. PCT/CN2019/090469, filed on Jun. 10, 2019.
Claims priority of application No. 201910252856.0 (CN), filed on Mar. 29, 2019; application No. 201920419356.7 (CN), filed on Mar. 29, 2019; and application No. 201910731634.7 (CN), filed on Aug. 8, 2019.
Prior Publication US 2021/0221567 A1, Jul. 22, 2021
Int. Cl. B31B 70/02 (2017.01); B31B 70/20 (2017.01); B31B 70/62 (2017.01); B65D 30/08 (2006.01); B31B 70/26 (2017.01); B31B 70/00 (2017.01); B32B 1/00 (2006.01); B32B 3/26 (2006.01); B32B 29/00 (2006.01); B65D 65/40 (2006.01); B65D 81/02 (2006.01); B65D 65/46 (2006.01); B65D 81/03 (2006.01); B31D 5/00 (2017.01); B31B 170/20 (2017.01)
CPC B65D 31/02 (2013.01) [B31B 70/005 (2017.08); B31B 70/02 (2017.08); B31B 70/024 (2017.08); B31B 70/20 (2017.08); B31B 70/26 (2017.08); B31B 70/62 (2017.08); B32B 1/00 (2013.01); B32B 3/266 (2013.01); B32B 29/005 (2013.01); B65D 65/406 (2013.01); B65D 65/44 (2013.01); B65D 65/466 (2013.01); B65D 81/03 (2013.01); B31B 2170/20 (2017.08); B31D 5/0065 (2013.01); B32B 2250/26 (2013.01); B32B 2439/06 (2013.01); B32B 2553/00 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A manufacturing apparatus of an environmental paper protective bag, the paper protective bag made by planar structures, each of the planar structures comprising an inner layer, an outer layer and an inner-core layer arranged between the inner layer and the outer layer to form a buffer, the inner-core layer comprising at least one layer of liner; wherein the at least one layer of liner is a network three-dimensional structure formed by stretching a middle-layer paper material that has been die-cut, the manufacturing apparatus comprising:
first and second planar structure manufacturing devices arranged opposite to each other, each planar structure manufacturing device configured to produce a planar structure of the planar structures, each of the first and second planar structure manufacturing devices comprising:
a frame comprising a working platform arranged along a conveying direction of paper material;
an inner layer unreeling module and an outer layer unreeling module respectively arranged on the frame and respectively configured to unreel inner-layer paper material and outer-layer paper material, and
at least one inner-core layer unreeling module arranged between the inner layer unreeling module and the outer layer unreeling module, and configured to unreel the middle-layer paper material, the inner layer unreeling module, the at least one inner-core layer unreeling module and the outer layer unreeling module arranged in turn along the conveying direction, wherein all the inner-layer paper material, the middle-layer paper material and the outer-layer paper material that have been unreeled are superimposed in turn, and arranged on the working platform to be transmitted along the conveying direction thereof;
a first tension adjusting device arranged between the inner layer unreeling module and the working platform and configured to adjust tension of the inner-layer paper material;
a second tension adjusting device arranged between the inner-core layer unreeling module and the working platform and configured to adjust tension of the middle-layer paper material;
a third tension adjusting device arranged between the outer layer unreeling module and the working platform and configured to adjust tension of the outer-layer paper material;
a stretching module arranged at a rear end of the second tension adjusting device and configured to stretch the middle-layer paper material that has been die-cut into the network three-dimensional structure so as to form the at least one layer of liner and then transmit the at least one layer of liner to the working platform;
a plurality of first gluing modules arranged on the frame and facing-towards the working platform, each of the inner-layer paper material, the at least one layer of liner and the outer-layer paper material associated with at least one of the plurality of first gluing modules, the plurality of first gluing modules configured to glue bonding positions of each layer of the inner-layer paper material, the at least one layer of liner and the outer-layer paper material to join the inner-layer paper material, the at least one layer of liner and the outer-layer paper material together;
a first press-fit module arranged at a back end of the third tension adjusting device and configured to press and fit the glued bonding positions to form the planar structure; and wherein
first and second planar structures produced by the first and second planar structure manufacturing devices, respectively, are superimposed with each other along the conveying direction to be conveyed synchronously;
the manufacturing apparatus further comprising:
a second gluing module configured to glue edge surfaces of any one of the first and second planar structures so as to adhere one of the first and second planar structures to an edge of the other of the first and second planar structures;
a second press-fit module configured to press and fit the glued bonding positions of the first and second planar structures;
a cutting module configured to cut the two pressed planar structures into a plurality of bag-body units;
a gluing and edge-folding module configured to glue sides of the plurality of bag-body units and then fold and press glued sides thereof together to form a bottom of the protective bag.