本文另有中文版。
The official website of Wuxi Qianzhou Xinghua Machinery Co., Ltd. states that the company holds 119 patents, and the honors page presents that figure together with invention and utility-model patents. The same page publishes an index of about 120 public texts, explaining that the entries come from a Google Patents search in which the company is the applicant, that the list is intended to show the public layout of technology in coating, setting and carpet lines, and that it does not claim every item is still legally in force. A complete official list, the page adds, can be provided during an enquiry. This series uses the same cautious standard. The figure of 119 is the total published by the company. It is not treated here as an independently audited count of patents currently in force. Only documents that have been opened in a public patent database, and whose rights holder or applicant has been confirmed, are discussed in detail.
The documents that have been checked cluster along technical lines close to the main business. In coating they include a combination coating head, infeed and outfeed frames for coating machines, and more recent filings for a bitumen composite coating head and a double-sided sizing device for carpet fabric. In carpet finishing they include an automatic carpet shaping and stacking device, a carpet oven, an oven temperature-control device and a steam-box drip-prevention device. In setting and thermal work there is a heated-roller assembly with tension feedback, which the official stenter page also lists as a published patent direction. Xi Jianxing appears frequently among the inventors; Zhou Tian, Ma Changkai, Xi Xiaohu and Pu Zhenyu appear on some documents. Filing and grant dates run from around 2014 through 2023 and 2024.
Among them, the invention patent “Automatic carpet shaping and stacking device” has the grant publication number CN103950581B. It was filed on 13 May 2014, granted on 9 March 2016, and names Ma Changkai and Zhou Tian as inventors. The patent concerns automatic shaping and stacking at the discharge end of a carpet conveyor, so that carpets are counted, guided, patted into shape and pushed onward before packing. The utility model “Combination coating head for a coating machine” (CN205995709U) was filed on 14 July 2016, granted on 8 March 2017, and names Xi Jianxing as inventor. It combines a pneumatic knife-lift with a limit device, an automatic paste-stop device, a fabric guide roller, an aluminium expanding roller and constant-tension detection. The more recent “Bitumen composite coating head” (CN219723533U) was filed on 15 May 2023 and granted on 22 September 2023; the “Double-sided sizing device for carpet fabric” (CN217250268U) was filed on 26 January 2022 and granted on 23 August 2022; the “Heated-roller assembly with tension feedback” (CN220750679U) was filed on 8 September 2023 and granted on 9 April 2024; and the invention patent “Carpet steam-box drip-prevention device” (CN108001040B) was filed on 31 October 2016 and granted on 20 February 2024. Google Patents marks the later items as Active. Current legal status should nonetheless be confirmed on the official register of the China National Intellectual Property Administration.
The other side of the record must also be stated. Some utility models granted around 2016, including “A carpet oven” (CN206131638U) and “An oven temperature-control device for a carpet production line” (CN206131698U), are shown on Google Patents as later terminated for non-payment of annual fees. They remain public technical disclosures that were once granted, and they can be read as evidence of the design thinking of that period, but they should not be described as patents currently in force. The honors page also includes public texts for workshop auxiliary equipment. Even where the applicant is the same company, this series does not treat items far from coating, setting and carpet finishing as core technology.
The official site groups its public-text index into coating heads and infeed/outfeed frames; carpet cutting, packing and slitting; ovens, heating and steam treatment; fabric guidance, web guiding and process auxiliaries; and workshop and auxiliary equipment. That grouping is a reading frame offered by the company for purchasing and technical discussion. It is not a legal-status opinion on each item. The coating-machine page also points to published directions such as a temperature-controlled infeed frame, a combination infeed frame, a combination outfeed frame and coating heads, and states that the actual head type is determined by the model page and the quotation. Read against the product pages, most of these public texts correspond to specific stations on a production line, not to abstract ideas detached from the machines.
A common misreading should be avoided: treating the number of public texts as proof that “all 119 patents are currently in force,” or counting both the application publication and the grant publication of the same family and then claiming a still larger total. The same technical solution often appears both as an application publication and as a grant publication, with different public numbers but in one application family. The official site already reminds readers that “published” or “granted” on a results card does not automatically mean the right is still in force. This article cites names, numbers, dates and inventors only for files that have been opened, and it notes termination or uncertain status where that is known. If the company later provides extracts from the official patent register or an updated list of rights in force, the wording can be corrected on that basis.
A careful reading of the portfolio is therefore this: the company has continued to write the concrete structures of its coating heads, infeed and outfeed, carpet stacking and packing, oven thermal systems, drip prevention and heated-roller tension control into public patent texts; the official site gives a total; and the public databases allow the titles, numbers, filing dates and inventors of specific items to be checked. Readers who wish to discuss a particular technology may, as the official site suggests, note the publication number or the corresponding machine model in an enquiry. The next article looks more closely at coating heads and sizing; the article after that turns to ovens, tension and drip prevention, in each case using only the patent texts and official product descriptions that have been opened.