什么(me)是裹背條，裹背條是通過(guo)皮殼機(ji)(ji)等機(ji)(ji)械用于精裝(zhuang)書(shu)(shu)(shu)(shu)本(ben)(ben)的(de)書(shu)(shu)(shu)(shu)脊(ji)部分，使書(shu)(shu)(shu)(shu)貼連接得更加牢固。書(shu)(shu)(shu)(shu)脊(ji)制(zhi)作弧長的(de)計(ji)算，本(ben)(ben)器規(gui)格依書(shu)(shu)(shu)(shu)芯(xin)幅面大小(xiao)進行調定，以能將書(shu)(shu)(shu)(shu)芯(xin)平(ping)穩地送(song)進夾書(shu)(shu)(shu)(shu)裝(zhuang)置內為標準。入本(ben)(ben)后的(de)書(shu)(shu)(shu)(shu)冊不斜歪，四角垂直地頂(ding)齊在(zai)夾書(shu)(shu)(shu)(shu)裝(zhuang)置的(de)靠板、側規(gui)內。裁切(qie)尺寸正確一(yi)致(zhi)，其質量(liang)要求(qiu)與規(gui)格誤差與一(yi)般切(qie)書(shu)(shu)(shu)(shu)相(xiang)同。

夾(jia)(jia)書(shu)(shu)簽絲帶裝(zhuang)置安放在切書(shu)(shu)機與(yu)扒圓起脊(ji)機之間(jian)。即(ji)將(jiang)切完的(de)書(shu)(shu)芯，用(yong)分本器從(cong)中(zhong)間(jian)分開，再(zai)由輸放絲帶器將(jiang)絲帶夾(jia)(jia)入中(zhong)心紙書(shu)(shu)芯的(de)中(zhong)間(jian)靠訂縫(feng)一邊(bian)。絲帶夾(jia)(jia)在書(shu)(shu)芯內兩(liang)端各留出粘邊(bian)和(he)使(shi)用(yong)的(de)余地，再(zai)經切刀(dao)（剪刀(dao)式(shi)）將(jiang)其剪斷。

剪斷(duan)后(hou)的(de)絲(si)(si)(si)帶，裹背(bei)(bei)(bei)(bei)(bei)條(tiao)芯部分(fen)被(bei)下面(mian)膠輥(gun)著膠、壓實完成(cheng)夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)簽絲(si)(si)(si)帶過程。書(shu)(shu)(shu)(shu)(shu)(shu)簽絲(si)(si)(si)帶的(de)長度與(yu)一(yi)般(ban)手(shou)工(gong)加工(gong)長度基本相同(tong)，可依書(shu)(shu)(shu)(shu)(shu)(shu)冊幅(fu)面(mian)長度調定。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起脊(ji)(ji)(ji)操作及要求(qiu)。書(shu)(shu)(shu)(shu)(shu)(shu)芯經裁切、夾(jia)粘(zhan)絲(si)(si)(si)帶（或(huo)不夾(jia)粘(zhan)絲(si)(si)(si)帶）后(hou)，繼續傳送（或(huo)翻轉變位）并做90°翻轉，使平放書(shu)(shu)(shu)(shu)(shu)(shu)芯變為(wei)后(hou)背(bei)(bei)(bei)(bei)(bei)朝上（或(huo)朝下）而(er)進(jin)入扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起脊(ji)(ji)(ji)機(ji)(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起脊(ji)(ji)(ji)機(ji)(ji)的(de)加工(gong)，其操作分(fen)為(wei)兩(liang)步，但機(ji)(ji)器的(de)結構(gou)是連在一(yi)起的(de)，均是先扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)后(hou)起脊(ji)(ji)(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起脊(ji)(ji)(ji)機(ji)(ji)在扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)時，由一(yi)組(zu)（或(huo)一(yi)對）圓(yuan)(yuan)(yuan)(yuan)輥(gun)，將書(shu)(shu)(shu)(shu)(shu)(shu)芯壓緊后(hou)作相對旋轉動作），使書(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)扒(ba)(ba)(ba)成(cheng)適當(dang)規(gui)格圓(yuan)(yuan)(yuan)(yuan)勢(shi)，加工(gong)成(cheng)圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)芯。書(shu)(shu)(shu)(shu)(shu)(shu)芯書(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)的(de)形狀分(fen)為(wei)圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有脊(ji)(ji)(ji)、圓(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)(ji)和(he)方背(bei)(bei)(bei)(bei)(bei)（或(huo)稱平背(bei)(bei)(bei)(bei)(bei)）三種。平裝裹背(bei)(bei)(bei)(bei)(bei)條(tiao)書(shu)(shu)(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)不高出書(shu)(shu)(shu)(shu)(shu)(shu)芯平面(mian)，而(er)精裝書(shu)(shu)(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)一(yi)般(ban)要高出書(shu)(shu)(shu)(shu)(shu)(shu)芯的(de)平面(mian)。書(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)分(fen)為(wei)真脊(ji)(ji)(ji)和(he)假脊(ji)(ji)(ji)。

真(zhen)脊(ji)是(shi)利用書(shu)(shu)(shu)背(bei)上下兩邊變形的(de)弧度高(gao)出書(shu)(shu)(shu)芯(xin)平(ping)面(mian)(mian)；假脊(ji)則是(shi)利用紙板(ban)鑲(xiang)在書(shu)(shu)(shu)背(bei)后形成(cheng)的(de)書(shu)(shu)(shu)脊(ji)，書(shu)(shu)(shu)脊(ji)的(de)脊(ji)高(gao)等于(yu)封面(mian)(mian)紙板(ban)的(de)厚度。方背(bei)書(shu)(shu)(shu)芯(xin)。是(shi)指書(shu)(shu)(shu)芯(xin)的(de)書(shu)(shu)(shu)背(bei)平(ping)直(zhi)方正。書(shu)(shu)(shu)背(bei)不突出，與平(ping)裝(zhuang)書(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)背(bei)基(ji)本相似。

背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)上下(xia)環襯互成直角，由于精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)是用(yong)鎖線訂訂連，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)(de)訂口折縫(feng)里面都(dou)用(yong)線串過，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)脊(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其(qi)它部(bu)分(fen)要厚(hou)一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)(de)帖(tie)數(shu)越(yue)多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)其(qi)它部(bu)分(fen)厚(hou)度(du)的(de)(de)(de)差別也越(yue)大。所以(yi)方(fang)背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的(de)(de)(de)形式一(yi)般只用(yong)于厚(hou)度(du)約為20mm的(de)(de)(de)精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)有(you)脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)有(you)脊(ji)(ji)(ji)又稱圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)真脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)部(bu)呈圓(yuan)(yuan)(yuan)(yuan)(yuan)弧形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)高起有(you)脊(ji)(ji)(ji)壟，堅(jian)硬挺(ting)(ting)實(shi)，這(zhe)種(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)的(de)(de)(de)形式適合于裝(zhuang)(zhuang)(zhuang)訂較(jiao)厚(hou)的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)(zhuang)(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后有(you)明顯的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方(fang)便。目前我國的(de)(de)(de)精(jing)裝(zhuang)(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多采用(yong)這(zhe)種(zhong)圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)有(you)脊(ji)(ji)(ji)的(de)(de)(de)加工形式。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)又稱圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)假脊(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)部(bu)呈圓(yuan)(yuan)(yuan)(yuan)(yuan)弧形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的(de)(de)(de)厚(hou)度(du)相同，堅(jian)實(shi)挺(ting)(ting)括，但(dan)沒有(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)條脊(ji)(ji)(ji)。這(zhe)種(zhong)形式的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)，一(yi)般常與(yu)軟質(zhi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或塑(su)料壓制而成的(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相配套。中(zhong)心紙有(you)些機器(qi)還沒有(you)沖圓(yuan)(yuan)(yuan)(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)置(zhi)，即將方(fang)背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)(xian)進行沖圓(yuan)(yuan)(yuan)(yuan)(yuan)加工，作初(chu)步定(ding)型。先(xian)(xian)根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)厚(hou)度(du)和中(zhong)心紙幅面大小(xiao)調定(ding)好夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)及扒(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)輥(gun)（或沖圓(yuan)(yuan)(yuan)(yuan)(yuan)裝(zhuang)(zhuang)(zhuang)置(zhi)）的(de)(de)(de)規(gui)矩(ju)，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)進入(ru)夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)內并送到扒(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)輥(gun)之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)扒(ba)擠成一(yi)定(ding)圓(yuan)(yuan)(yuan)(yuan)(yuan)勢。