PWJ—1400型平板纸单面楞纸板机(简称四维单面机),是北京市四维产业总公司研制,由北京四维包装机械厂批量生产的1993年国家级新产品(条码编号:3110600690536)。作为首次实现平板纸生产单面瓦楞纸板的专业包装设备,四维单面机已获得国家专利权(专利编号:92239057.6)。由于四维单面机对广大中小纸箱生产企业,有着特别广泛的推广使用价值,所以被北 PWJ-1400 flat paper single-faced corrugated board machine (abbreviated as 4-D single-sided machine) is a new state-level product (code: 3110600690536) of 1993, which was developed by Beijing Siwei Industrial Corporation and was mass-produced by Beijing Siwei Packaging Machinery Factory. As the first professional flat-panel paper production of single-sided corrugated packaging equipment, four-dimensional single-sided machine has won the national patent (patent number: 92239057.6). As the four-dimensional single-sided machine for the majority of small and medium-sized carton manufacturers, has a particularly wide range of promotional value, it is North